Sunday, December 13, 2015
Wednesday, November 18, 2015
Sunday, October 4, 2015
Saturday, August 22, 2015
Saturday, August 15, 2015
Wednesday, July 1, 2015
Saturday, June 27, 2015
Thursday, June 18, 2015
Pay Power Scam
There is a New Scam going on posing as Enersource
A person will call saying that they are from Enersource and that your power will be disconnected if you do not pay $450.00.
There was a problem and you payed your bills to the wrong account number. We will re-imburse you with the money Tomorrow in a Cheque for the same amount. Sorry for the inconvenience.
This call is being recorded will be mentioned many times during the conversation to really get your attention.
You must go to Rexall Pharmacy and ask the lady behind the counter for a PayPower Reload Card with a 10 Digit scratch portion located in the back of this card.
You are to call us back at 1 844-859-5019 Ext 886 and Ask for the floor Supervisor, Jason Field
You must give him the 10 digit number on the back of the card and he will contact the correct person so that your power will not be disconnected.
They even provide a reference number: Ours was 9900786
This is how the Scam goes.
Several things to be aware of are:
1. The Number that these people are using is coming from the United States
1-844-859-5019
2. If you actually call the Number a message comes on asking what your age is and to press the correct number to indicate whether you are over 18 or under 18.
3. They actually keep calling you back and when you ask them to stay on the line they hang up.
4. They specifically ask for the Scratch Pay Power Card with the 10 Digit number on the back.
5. The payment has to be made this way only.
6. No service will be disconnected without you first getting a warning letter etc, or some kind of previous notice of termination of services.
7. Enersource is aware of the situation, as they have a message saying to be aware of these
scammers.
8. When you come against anything slightly peculiar like this , always call the Service first to identify that it is indeed Legitimate and there is a problem.
Hope this helps you.
Gwansoon Lee
A person will call saying that they are from Enersource and that your power will be disconnected if you do not pay $450.00.
There was a problem and you payed your bills to the wrong account number. We will re-imburse you with the money Tomorrow in a Cheque for the same amount. Sorry for the inconvenience.
This call is being recorded will be mentioned many times during the conversation to really get your attention.
You must go to Rexall Pharmacy and ask the lady behind the counter for a PayPower Reload Card with a 10 Digit scratch portion located in the back of this card.
You are to call us back at 1 844-859-5019 Ext 886 and Ask for the floor Supervisor, Jason Field
You must give him the 10 digit number on the back of the card and he will contact the correct person so that your power will not be disconnected.
They even provide a reference number: Ours was 9900786
This is how the Scam goes.
Several things to be aware of are:
1. The Number that these people are using is coming from the United States
1-844-859-5019
2. If you actually call the Number a message comes on asking what your age is and to press the correct number to indicate whether you are over 18 or under 18.
3. They actually keep calling you back and when you ask them to stay on the line they hang up.
4. They specifically ask for the Scratch Pay Power Card with the 10 Digit number on the back.
5. The payment has to be made this way only.
6. No service will be disconnected without you first getting a warning letter etc, or some kind of previous notice of termination of services.
7. Enersource is aware of the situation, as they have a message saying to be aware of these
scammers.
8. When you come against anything slightly peculiar like this , always call the Service first to identify that it is indeed Legitimate and there is a problem.
Hope this helps you.
Gwansoon Lee
Saturday, June 13, 2015
Friday, June 12, 2015
Sunday, June 7, 2015
Sunday, May 24, 2015
Monday, May 18, 2015
Sunday, May 17, 2015
Thursday, May 14, 2015
Tuesday, April 14, 2015
Spitfires Dogfighting Over The Tower of London
Spitfires Over The Tower of London Tattoo
The following photo is from
a Tattoo that we had completed. In this photo there are several spitfire
airplanes having dogfights. The interesting thing is that in the
background as you can see is the Tower Of London. A wonderful Landmark
Indeed.
The colors of the Spitfires
are amazing and bring a realism to this photo as they are almost identical to
the original color scheme of the Airplane. I particularly like the Cammo
Paint Scheme.
A very subjective tattoo
I suppose, a good Title
would be Spitfires Over The Tower Of London or London Has Fallen , for a good
headline in the newspapers.
What is interesting is the
fact that the allies and British for that matter would have allowed the enemy
to enter their Airspace or perhaps penetrate it without their knowledge. Was
their prior knowledge; or did they (the enemy) just sneak in without anyone
knowing this. Perhaps there was a double agent working at the radar station.
This could be deemed as the
final blow to Britain as there is smoke coming from the Tower of London and
looks like it is ready to crumble to the ground . This could also mean the end
of Britain. Once the Enemy has penetrated the British Defences, could this mean
that everything else is already lost. Perhaps this is the end for Britain. The
surrounding territory has already been captured and this was the last Stand for
the British and Their Allies. The war has been lost.
Spitfires Over The Tower of London
The Supermarine Spitfire is a
British single-seat fighter aircraft
that was used by the Royal Air Force
and many other Allied countries during and after the Second World War.
The Spitfire was built in many variants, using several wing configurations, and
was produced in greater numbers than any other British aircraft. It was also the
only British fighter to be in continuous production throughout the war. The
Spitfire continues to be a popular aircraft, with approximately 53
Spitfires being airworthy, while many more
are static exhibits in aviation museums all over the world.
The Spitfire was designed as a
short-range, high-performance interceptor aircraft by R. J. Mitchell,
chief designer at Supermarine Aviation Works (which operated as a subsidiary of Vickers-Armstrong
from 1928). In accordance with its role as an interceptor, Mitchell designed
the Spitfire's distinctive elliptical wing
to have the thinnest possible cross-section; this thin wing enabled the
Spitfire to have a higher top speed than several contemporary fighters,
including the Hawker Hurricane. Mitchell continued to refine the design until his death
from cancer in 1937, whereupon his colleague Joseph
Smith took over as chief designer,
overseeing the development of the Spitfire through its multitude of variants.
During the Battle of Britain
(July–October 1940), the Spitfire was perceived by the public to be the
RAF fighter, though the more numerous Hawker Hurricane
shouldered a greater proportion of the burden against the Luftwaffe.
However, because of its higher performance, Spitfire units had a lower
attrition rate and a higher victory-to-loss ratio than those flying Hurricanes.
After the Battle of Britain, the
Spitfire superseded the Hurricane to become the backbone of RAF Fighter Command, and saw action in the European, Mediterranean,
Pacific and the South-East
Asian theatres. Much loved by its pilots,
the Spitfire served in several roles, including interceptor,
photo-reconnaissance, fighter-bomber and trainer, and it continued to serve in
these roles until the 1950s. The Seafire was a carrier-based adaptation of the Spitfire which served
in the Fleet Air Arm from 1942 through to the mid-1950s. Although the original
airframe was designed to be powered by a Rolls-Royce Merlin engine producing 1,030 hp (768 kW), it was strong enough
and adaptable enough to use increasingly powerful Merlin and, in later marks, Rolls-Royce Griffon engines producing up to 2,340 hp (1,745 kW); as a
consequence of this the Spitfire's performance and capabilities improved, sometimes dramatically, over the course of its
life.
Development
and production[edit]
Origins[edit]
R. J. Mitchell's 1931 design to meet Air
Ministry specification F7/30
for a new and modern fighter capable of 250 mph (400 km/h), the Supermarine Type 224, was an open-cockpit monoplane with bulky gull-wings and a
large fixed, spatted undercarriage powered by the 600 horsepower (450 kW) evaporatively
cooled Rolls-Royce Goshawk engine.[5]
This made its first flight in February 1934.[6]
The Type 224 was a big disappointment to Mitchell and his design team, who
immediately embarked on a series of "cleaned-up" designs, using their
experience with the Schneider Trophy
seaplanes as a starting point. Of the seven designs tendered to F7/30, the Gloster Gladiator
biplane was accepted for service.[7]
Mitchell had already begun working
on a new aircraft, designated Type 300, with a retractable undercarriage and
the wingspan reduced by 6 ft (1.8 m). This was submitted to the Air
Ministry in July 1934, but was not accepted.[8]
The design then went through a series of changes, including the incorporation
of a faired, enclosed cockpit, oxygen-breathing apparatus, smaller and thinner
wings, and the newly developed, more powerful Rolls-Royce PV-XII V-12 engine, later named the "Merlin". In
November 1934 Mitchell, with the backing of Supermarine's owner,
Vickers-Armstrong, started detailed design work on this refined version of the
Type 300[9]
and, on 1 December 1934, the Air Ministry issued contract AM 361140/34,
providing £10,000 for the construction of Mitchell's improved F7/30 design.[10]
On 3 January 1935, the Air Ministry formalised the contract and a new
specification, F10/35, was written around the aircraft.[11]
The unpainted Spitfire prototype K5054
at Eastleigh
airfield, just before the first flight. The angled rudder mass balance and unfaired
main undercarriage and tailskid can be seen. This aircraft was written off
after a landing accident at the Royal
Aircraft Establishment (R.A.E.) at
Farnborough on 4 September 1939.[12]
In April 1935, the armament was
changed from two .303 in (7.7 mm) Vickers machine guns in each wing to four .303 in (7.7 mm) Brownings,[13]
following a recommendation by Squadron Leader Ralph Sorley
of the Operational Requirements section at the Air Ministry.[14]
On 5 March 1936,[15] the prototype (K5054) took off on its first flight
from Eastleigh Aerodrome (later Southampton
Airport). At the controls was Captain Joseph "Mutt" Summers, chief test pilot for Vickers, who is quoted as saying
"Don't touch anything" on landing.[16][nb 2]
This eight-minute flight[14]
came four months after the maiden flight of the contemporary Hurricane.[18]
K5054 was fitted with a new propeller, and Summers flew the
aircraft on 10 March 1936; during this flight the undercarriage was retracted
for the first time.[19]
After the fourth flight, a new engine was fitted, and Summers left the
test-flying to his assistants, Jeffrey Quill
and George Pickering. They soon discovered that the Spitfire[nb 3][22]
was a very good aircraft, but not perfect. The rudder was over-sensitive and
the top speed was just 330 mph (528 km/h), little faster than Sydney Camm's
new Merlin-powered Hurricane.[24]
A new and better-shaped wooden propeller meant the Spitfire reached
348 mph (557 km/h) in level flight in mid-May, when Summers flew K5054
to RAF Martlesham Heath and handed the aircraft over to Squadron Leader Anderson of
the Aeroplane & Armament Experimental Establishment (A&AEE). Here, Flight Lieutenant Humphrey
Edwardes-Jones took over the prototype for the RAF.[25]
He had been given orders to fly the aircraft and then to make his report to the
Air Ministry on landing. Edwardes-Jones's report was positive; his only request
was that the Spitfire be equipped with an undercarriage position indicator.[26]
A week later, on 3 June 1936, the Air Ministry placed an order for 310
Spitfires,[27] before any formal report had been issued by the A&AEE;
interim reports were later issued on a piecemeal basis.[28]
Into
production[edit]
The British public first saw the
Spitfire at the RAF Hendon air-display on Saturday 27 June 1936. Although full-scale
production was supposed to begin immediately, there were numerous problems that
could not be overcome for some time and the first production Spitfire, K9787,
did not roll off the Woolston, Southampton assembly line until mid-1938.[1]
The first and most immediate problem was that the main Supermarine factory at
Woolston was already working at full capacity fulfilling orders for Walrus and Stranraer flying boats. Although outside contractors were supposed to
be involved in manufacturing many important Spitfire components, especially the
wings, Vickers-Armstrong (the parent company) was reluctant to see the Spitfire
being manufactured by outside concerns and was slow to release the necessary
blueprints and subcomponents. As a result of the delays in getting the Spitfire
into full production, the Air Ministry put forward a plan that production of
the Spitfire be stopped after the initial order for 310, after which
Supermarine would build Bristol Beaufighters. The managements of Supermarine and Vickers were able to
convince the Air Ministry that the problems could be overcome and further
orders were placed for 200 Spitfires on 24 March 1938, the two orders covering
the K, L and N prefix serial numbers.[29]
In February 1936 the director of
Vickers-Armstrongs, Sir Robert MacLean, guaranteed production of five aircraft
a week, beginning 15 months after an order was placed. On 3 June 1936, the Air
Ministry placed an order for 310 aircraft, for a price of £1,395,000.[30]
Full-scale production of the Spitfire began at Supermarine's facility in
Woolston, Southampton, but it quickly became clear that the order could not be
completed in the 15 months promised. Supermarine was a small company, already
busy building Walrus and Stranraer flying boats, and Vickers was busy building
the Wellingtons. The initial solution was to subcontract the work.[30]
The first production Spitfire rolled off the assembly line in mid-1938,[1] and was flown by Jeffrey Quill on 15 May 1938, almost 24
months after the initial order.[31]
The final cost of the first 310
aircraft, after delays and increased programme costs, came to £1,870,242 or £1,533 more per
aircraft than originally estimated.[4]
Production aircraft cost about £9,500. The most expensive components were the
hand-fabricated and finished fuselage at approximately £2,500, then the
Rolls-Royce Merlin engine at £2,000, followed by the wings at £1,800 a pair,
guns and undercarriage, both at £800 each, and the propeller at £350.[32]
Manufacturing
at Castle Bromwich[edit]
Spitfire Mk IIA, P7666, EB-Z,
"Observer Corps", was built at Castle Bromwich, and delivered to 41 Squadron on 23 November 1940.[nb 4]
In 1935, the Air Ministry approached
Morris Motors Limited to ask how quickly their Cowley plant
could be turned to aircraft production. In 1936 this informal request for major
manufacturing facilities was turned into a formal scheme to boost British
aircraft production capacity under the leadership of Herbert Austin,
known as the Shadow factory plan. Austin was given the task of building nine new factories,
and to supplement the existing British car manufacturing industry by either adding
to overall capacity or increasing the potential for reorganisation to produce
aircraft and their engines.
Under the plan, on 12 July 1938, the
Air Ministry bought a site consisting of farm fields and a sewage works
next to Castle
Bromwich Aerodrome in Birmingham.
This shadow factory would supplement Supermarine's original factories in
Southampton in building the Spitfire. The Castle
Bromwich Aircraft Factory ordered
the most modern machine tools then available, which were being installed two months after
work started on the site.[4]
Although Morris Motors under Lord Nuffield
(an expert in mass motor-vehicle construction) at first managed and equipped
the factory, it was funded by government money. When the project was first
mooted it was estimated that the factory would be built for £2,000,000,
however, by the beginning of 1939 this cost had doubled to over £4,000,000.[33]
The Spitfire's stressed-skin construction required precision engineering skills
and techniques outside the experience of the local labour force, which took
some time to train. However, even as the first Spitfires were being built in
June 1940 the factory was still incomplete, and there were numerous problems
with the factory management, which ignored tooling and drawings provided by
Supermarine in favour of tools and drawings of its own designs,[34]
and with the workforce which, while not completely stopping production, continually
threatened strikes or "slow downs" until their demands for higher
than average pay rates were met.[35]
By May 1940, Castle Bromwich had not
yet built its first Spitfire, in spite of promises that the factory would be
producing 60 per week starting in April.[33]
On 17 May Lord
Beaverbrook, Minister of Aircraft Production,
telephoned Lord Nuffield and manoeuvered him into handing over control of the
Castle Bromwich plant to Beaverbook's Ministry.[36]
Beaverbrook immediately sent in experienced management staff and experienced
workers from Supermarine and gave over control of the factory to
Vickers-Armstrong. Although it would take some time to resolve the problems, in
June 1940, 10 Mk IIs were built; 23 rolled out in July, 37 in August, and 56 in
September.[37]
By the time production ended at Castle Bromwich in June 1945, a total of 12,129
Spitfires (921 Mk IIs,[38] 4,489 Mk Vs, 5,665 Mk IXs,[39]
and 1,054 Mk XVIs[38])
had been built. CBAF went on to become the largest and most successful plant of
its type during the 1939–45 conflict. As the largest Spitfire factory in the
UK, by producing a maximum of 320 aircraft per month, it built over half of the
approximately 20,000 aircraft of this type.
Production
dispersal[edit]
During the Battle of Britain,
concerted efforts were made by the Luftwaffe to destroy the main
manufacturing plants at Woolston and Itchen, near Southampton. The first bombing raid, which missed the
factories, came on 23 August 1940. Over the next month, other raids were
mounted until, on 26 September 1940, both factories were completely wrecked,[40] with 92 people being killed and a large number injured;
most of the casualties were experienced aircraft production workers.[41]
Fortunately for the future of the
Spitfire, many of the production jigs and machine tools had already been
relocated by 20 September, and steps were being taken to disperse production to
small facilities throughout the Southampton area.[40]
To this end, the British government requisitioned the likes of Vincent's Garage
in Station Square Reading, which later specialised in manufacturing Spitfire
fuselages, and Anna Valley Motors, Salisbury,
which was to become the sole producer of the wing leading-edge fuel tanks for
photo-reconnaissance Spitfires, as well as producing other components. A
purpose-built works, specialising in manufacturing fuselages and installing
engines, was built at Star Road, Caversham in Reading.[41]
The drawing office in which all Spitfire designs were drafted was relocated to
another purpose-built site at Hursley Park,
near Southampton. This site also had an aircraft assembly hangar where many
prototype and experimental Spitfires were assembled, but since it had no
associated aerodrome no Spitfires ever flew from Hursley.
Four towns and their satellite
airfields were chosen to be the focal points for these workshops:[40]
- Southampton and Eastleigh
Airport
- Salisbury with High Post and Chattis Hill aerodromes[nb 5]
- Trowbridge
with Keevil aerodrome
- Reading with Henley and Aldermaston
aerodromes.
- An experimental factory at Newbury was the subject of a
Luftwaffe daylight raid but all missed their target and bombed a
nearby school.
Completed Spitfires were delivered
to the airfields on large Commer "Queen Mary" low-loader articulated trucks, there to be fully
assembled, tested, then passed on to the RAF.[41]
Flight
testing[edit]
All production Spitfires were flight
tested before delivery. During the Second World War, Jeffrey Quill
was Vickers Supermarine's chief test pilot, in charge of flight-testing all
aircraft types built by Vickers Supermarine; he also oversaw a group of 10 to
12 pilots responsible for testing all developmental and production Spitfires
built by the company in the Southampton area.[nb 6]
Quill had also devised the standard testing procedures which, with variations
for specific aircraft designs, operated from 1938.[42][43]
Alex Henshaw,
chief test pilot at Castle Bromwich from 1940, was placed in charge of testing
all Spitfires built at that factory, coordinating a team of 25 pilots; he also
assessed all Spitfire developments. Between 1940 and 1946, Henshaw flew a total
of 2,360 Spitfires and Seafires, more than 10% of total production.[44][45]
Henshaw wrote about flight testing
Spitfires:
After a thorough pre-flight check I
would take off and, once at circuit height, I would trim the aircraft and try
to get her to fly straight and level with hands off the stick ... Once the
trim was satisfactory I would take the Spitfire up in a full-throttle climb at
2,850 rpm to the rated altitude of one or both supercharger blowers. Then
I would make a careful check of the power output from the engine, calibrated
for height and temperature ... If all appeared satisfactory I would then put
her into a dive at full power and 3,000 rpm, and trim her to fly hands and
feet off at 460 mph IAS (Indicated Air Speed). Personally, I never cleared a
Spitfire unless I had carried out a few aerobatic tests to determine how good
or bad she was.
The production test was usually
quite a brisk affair: the initial circuit lasted less than ten minutes and the
main flight took between twenty and thirty minutes. Then the aircraft received
a final once-over by our ground mechanics, any faults were rectified and the
Spitfire was ready for collection.
I loved the Spitfire in all of her many versions. But I have
to admit that the later marks, although they were faster than the earlier ones,
were also much heavier and so did not handle so well. You did not have such
positive control over them. One test of manoeuvrability was to throw her into a
flick-roll and see how many times she rolled. With the Mark II or the Mark V
one got two-and-a-half flick-rolls but the Mark IX was heavier and you got only
one-and-a-half. With the later and still heavier versions, one got even less.
The essence of aircraft design is compromise, and an improvement at one end of
the performance envelope is rarely achieved without a deterioration somewhere
else.[46][47]
When the last Spitfire rolled out in
February 1948,[48] a total of 20,351 examples of all variants had been built,
including two-seat trainers, with
some Spitfires remaining in service well into the 1950s.[3]
The Spitfire was the only British fighter aircraft to be in continuous
production before, during and after the Second World War.[49]
Design[edit]
Airframe[edit]
Spitfire Mk IIa P7350 of the BBMF is the only existing airworthy Spitfire that fought in the
Battle of Britain.
In the mid-1930s, aviation design
teams worldwide started developing a new generation of all-metal, low-wing
fighter aircraft. The French Dewoitine D.520[50]
and Germany's Messerschmitt Bf 109, for example, were designed to take advantage of new
techniques of monocoque construction and the availability of new high-powered,
liquid-cooled, in-line aero engines. They also featured refinements such as
retractable undercarriages, fully enclosed cockpits and low drag, all-metal
wings (all introduced on civil airliners years before but slow to be adopted by
the military, who favoured the biplane's simplicity and manoeuvrability).[51]
Mitchell's design aims were to
create a well-balanced, high-performance bomber interceptor and fighter
aircraft capable of fully exploiting the power of the Merlin engine, while
being relatively easy to fly.[52]
At the time, no enemy fighters were expected to appear over Great Britain; to
carry out the mission of home defence, the design was intended to climb quickly
to meet enemy bombers.[53]
The Spitfire's airframe was complex:
the streamlined, semi-monocoque duralumin fuselage featured a large number of compound curves built
up from a skeleton of 19 formers, also known as frames, starting from frame number one, immediately behind the
propeller unit, to the tail unit attachment frame. The first four frames
supported the glycol header tank and engine cowlings. Frame 5, to which the
engine bearers were secured, supported the weight of the engine and
accessories, and the loads imposed by the engine: this was a strengthened
double frame which also incorporated the fireproof bulkhead and, in later
versions of the Spitfire, the oil tank. This frame also tied the four main
fuselage longerons
to the rest of the airframe.[54]
Behind the bulkhead were five 'U' shaped half-frames which accommodated the
fuel tanks and cockpit. The rear fuselage started at the eleventh frame, to
which the pilot's seat and (later) armour plating was attached, and ended at
the nineteenth, which was mounted at a slight forward angle just forward of the
fin. Each of these nine frames were oval, reducing in size towards the tail,
and incorporated several lightening holes
to reduce their weight as much as possible without weakening them. The U-shaped
frame 20 was the last frame of the fuselage proper and the frame to which the
tail unit was attached. Frames 21, 22 and 23 formed the fin; frame 22
incorporated the tailwheel opening and frame 23 was the rudder post. Before being attached to the main fuselage, the tail
unit frames were held in a jig and the eight horizontal tail formers were
riveted to them.[55]
Supermarine Spitfire Mk XVIe side
elevation drawing.
A combination of 14 longitudinal stringers
and four main longerons attached to the frames helped form a light but rigid
structure to which sheets of alclad stressed skinning were attached. The fuselage plating was
24, 20 and 18 gauge in order of thickness towards the tail, while the fin structure
was completed using short longerons from frames 20 to 23, before being covered
in 22 gauge plating.[56]
The skins of the fuselage, wings and
tailplane were secured by rivets and in critical areas such as the wing forward
of the main spar where an uninterrupted airflow was required, with flush
rivets; the fuselage used standard dome-headed riveting. From February 1943
flush riveting was used on the fuselage, affecting all Spitfire variants.[57]
In some areas, such as at the rear of the wing, and the lower tailplane skins
the top was riveted and the bottom fixed by brass screws which tapped into
strips of spruce bolted to
the lower ribs. The removable wing tips were made up of duralumin skinned
spruce formers.[58]
At first the ailerons, elevators and rudder were fabric-covered. When combat
experience showed that fabric-covered ailerons were impossible to use at high
speeds, a light alloy replaced the fabric, enhancing control throughout the
speed range.[59]
Elliptical
wing design[edit]
In 1934, Mitchell and the design
staff decided to use a semi-elliptical wing shape to solve two conflicting
requirements; the wing needed to be thin, to avoid creating too much drag, while
still able to house a retractable undercarriage, plus armament and ammunition.
An elliptical planform is the most efficient aerodynamic shape for an untwisted
wing, leading to the lowest amount of induced drag. The ellipse was skewed so
that the centre of pressure, which occurs at the quarter-chord position,
aligned with the main spar, thus preventing the wings from twisting. Mitchell
has sometimes been accused of copying the wing shape of the Heinkel He 70,
which first flew in 1932; but as Beverly Shenstone, the aerodynamicist
on Mitchell's team, explained "Our wing was much thinner and had quite a
different section to that of the Heinkel. In any case it would have been simply
asking for trouble to have copied a wing shape from an aircraft designed for an
entirely different purpose."[60][nb 7]
The
elliptical wing was decided upon quite early on. Aerodynamically it was the
best for our purpose because the induced drag caused in producing lift, was lowest when this shape was used: the ellipse
was ... theoretically a perfection ... To reduce drag we wanted the
lowest possible thickness-to-chord,
consistent with the necessary strength. But near the root the wing had to be
thick enough to accommodate the retracted undercarriages and the guns ...
Mitchell was an intensely practical man ... The ellipse was simply the
shape that allowed us the thinnest possible wing with room inside to carry the
necessary structure and the things we wanted to cram in. And it looked nice.
The wing section used was from the NACA 2200 series,
which had been adapted to create a thickness-to-chord ratio of 13% at the root,
reducing to 9.4% at the tip.[63]
A dihedral of six degrees was adopted to give increased lateral
stability.[52]
A feature of the wing which contributed
greatly to its success was an innovative spar boom
design, made up of five square tubes that fitted into each other. As the wing
thinned out along its span the tubes were progressively cut away in a similar
fashion to a leaf spring; two of these booms were linked together by an alloy web,
creating a lightweight and very strong main spar.[64]
The undercarriage legs were attached to pivot points built into the inner, rear
section of the main spar and retracted outwards and slightly backwards into
wells in the non-load-carrying wing structure. The resultant narrow
undercarriage track was considered to be an acceptable compromise as this
reduced the bending loads on the main-spar during landing.[64]
Ahead of the spar, the thick-skinned
leading edge of the wing formed a strong and rigid D-shaped box, which took
most of the wing loads. At the time the wing was designed, this D-shaped
leading edge was intended to house steam condensers for the evaporative cooling
system intended for the PV-XII. Constant problems with the evaporative system
in the Goshawk led to the adoption of a cooling system which used 100% glycol[nb 8].
The radiators were housed in a new radiator-duct designed by Fredrick
Meredith of the RAE at Farnborough; this used the cooling air to generate thrust, greatly reducing the net drag produced by the radiators.[65]
In turn, the leading-edge structure lost its function as a condenser, but it
was later adapted to house integral fuel tanks of various sizes.[66]
The elliptical planform of a
Spitfire PR.Mk.XIX displayed at an air show in 2008. Note the black and white Invasion stripes.
Another feature of the wing was its washout. The trailing edge of the wing twisted slightly upward
along its span, the angle of incidence decreasing from +2° at its root to -½° at its tip.[67]
This caused the wing roots to stall before the tips, reducing tip-stall that could otherwise
have resulted in a spin. As the wing roots started to stall, the aircraft
vibrated, warning the pilot, and hence allowing even relatively inexperienced
pilots to fly the aircraft to the limits of its performance.[68]
This washout was first featured in the wing of the Type 224 and became a
consistent feature in subsequent designs leading to the Spitfire.[69]
The complexity of the wing design, especially the precision required to
manufacture the vital spar and leading-edge structures, at first caused some
major hold-ups in the production of the Spitfire. The problems increased when
the work was put out to subcontractors, most of whom had never dealt with
metal-structured, high-speed aircraft. By June 1939, most of these problems had
been resolved, and production was no longer held up by a lack of wings.[70]
All of the main flight controls were
originally metal structures with fabric covering.[nb 9]Designers
and pilots felt that having ailerons which were too heavy to move (in terms of
effort, not mass) at high speed would avoid possible aileron reversal, stopping
pilots throwing the aircraft around and pulling the wings off. It was also felt
that air combat would take place at relatively low speed and that high-speed
manoeuvring would be physically impossible.[72]
During the Battle of Britain, pilots found the ailerons of the Spitfire were
far too heavy at high speeds, severely restricting lateral manoeuvres such as
rolls and high-speed turns, which were still a feature of air-to-air combat.[73]
Flight tests showed the fabric covering of the ailerons "ballooned"
at high speeds, adversely affecting the aerodynamics. Replacing the fabric
covering with light alloy dramatically improved the ailerons at high speed.[74]
Spitfire HF Mk VII. The shape of the
ellipse was altered by the extended "pointed" wing tips used by the
high-altitude Mk VI and VIIs, and some early Mk VIIIs.
The Spitfire had detachable wing
tips which were secured by two mounting points at the end of each main wing
assembly: when the Spitfire took on a role as a high-altitude fighter (Marks VI
and VII and some early Mk VIIIs) the standard wing tips were replaced by
extended, "pointed" tips which increased the wingspan from 36 ft
10 in (11.23 m) to 40 ft 2 in (12.3 m).[75]
The other wing tip variation, used by several Spitfire variants, was the
"clipped" wing; the standard wing tips were replaced by wooden
fairings which reduced the span to 32 ft 6 in (9.9 m)[76]
The wing tips used spruce formers for most of the internal structure with a light
alloy skin attached using brass screws.[77]
The airflow through the main
radiator was controlled by pneumatic
exit flaps. In early marks of Spitfire (Mk I to Mk VI) the single flap was
operated manually using a lever to the left of the pilot's seat. When the
two-stage Merlin was introduced in the Spitfire Mk IX
the radiators were split to make room for an intercooler radiator; the radiator
under the starboard wing was halved in size and the intercooler radiator housed
alongside. Under the port wing a new radiator fairing housed a square oil
cooler alongside of the other half-radiator unit. The two radiator flaps were
now operated automatically via a thermostat.[78]
The light alloy split flaps
at the trailing edge of the wing were also pneumatically operated via a finger
lever on the instrument panel.[79]
Only two positions were available; fully up or fully down (85°). The flaps were
normally lowered only during the final approach and for landing, and the pilot
was to retract them before taxiing.[nb 10][80]
The ellipse also served as the
design basis for the Spitfire's fin and tailplane assembly, once again
exploiting the shape's favourable aerodynamic characteristics. Both the
elevators and rudder were shaped so that their centre of mass was shifted
forward, thus reducing control-surface flutter. The longer noses and greater
propeller-wash resulting from larger engines in later models necessitated
increasingly larger vertical and, later, horizontal tail surfaces to compensate
for the altered aerodynamics, culminating in those of the Mk 22/24 series which
were 25% larger in area than those of the Mk I.[81][82]
Improved
late wing designs[edit]
As the Spitfire gained more power
and was able to manoeuvre at higher speeds, the possibility that pilots would
encounter aileron reversal increased, and the Supermarine design team set about
redesigning the wings to counter this. The original wing design had a theoretical
aileron reversal speed of 580 mph (930 km/h),[83] which was somewhat lower than that of some contemporary
fighters. The Royal
Aircraft Establishment noted
that, at 400 mph (640 km/h) IAS, roughly 65% of aileron effectiveness was lost, due to wing
twist.[84]
The new wing of the Spitfire F Mk 21
and its successors was designed to help alleviate this problem; the wing's
stiffness was increased by 47%, and a new design of aileron using piano
hinges and geared trim tabs
meant that the theoretical aileron reversal speed was increased to 825 mph
(1,328 km/h).[83][85][86]
Alongside of the redesigned wing Supermarine also experimented with the
original wing, raising the leading edge by one inch (2.54 cm), with the
hope of improving pilot view and reducing drag. This wing was tested on a
modified F Mk 21, also called the F Mk 23, (sometimes referred to as
"Valiant" rather than "Spitfire"). The increase in
performance was minimal and this experiment was abandoned.[87]
Supermarine developed a new laminar flow
wing based on new aerofoil profiles developed by NACA in the United States,
with the objective of reducing drag and improving performance. These laminar
flow airfoils were the Supermarine 371-I used at the root and the 371-II used
at the tip.[88]
Supermarine estimated that the new wing could give an increase in speed of
55 mph (89 km/h) over the Spitfire Mk 21.[89]
The new wing was initially fitted to a Spitfire Mk XIV; later a new fuselage
was designed, with the new fighter becoming the Supermarine Spiteful.[90]
Carburettor
versus fuel injection[edit]
Early in its development, the Merlin
engine's lack of fuel injection meant that both Spitfires and Hurricanes, unlike the Bf
109E, were unable to simply nose down into a steep dive. This meant a Luftwaffe
fighter could simply "bunt" into a high-power dive to escape an
attack, leaving the Spitfire behind, as its fuel was forced out of the carburettor
by negative "g".
RAF fighter pilots soon learned to "half-roll" their aircraft before
diving to pursue their opponents.[91]
Carburettors were adopted because, as Sir Stanley Hooker
explained, the carburettor "increased the performance of the supercharger
and thereby increased the power of the engine."[92]
In March 1941, a metal disc with a hole in it was fitted In the fuel line,
restricting fuel flow to the maximum the engine could consume. While it did not
cure the problem of the initial fuel starvation
in a dive, it did reduce the more serious problem of the carburettor being
flooded with fuel by the fuel pumps under negative "g". It became
known as "Miss Shilling's orifice" as it was invented by Beatrice "Tilly" Shilling. Further improvements were introduced throughout the Merlin
series, with Bendix-manufactured pressure carburettors, which were designed to allow fuel to flow during all
flight attitudes, introduced in 1942.[92]
Armament[edit]
Due to a shortage of Brownings,
which had been selected as the new standard rifle calibre machine gun for the
RAF in 1934, early Spitfires were fitted with only four guns, with the other
four fitted later.[93]
Early tests showed that while the guns worked perfectly on the ground and at
low altitudes, they tended to freeze at high altitude, especially the outer
wing guns. This was because the RAF's Brownings had been modified to fire from
an open bolt; while this prevented overheating
of the cordite used in
British ammunition, it allowed cold air to flow through the barrel unhindered.[94]
Supermarine did not fix the problem until October 1938, when they added hot air
ducts from the rear of the wing mounted radiators to the guns, and bulkheads
around the gunbays to trap the hot air in the wing. Red fabric patches were doped over the
gun ports to protect the guns from cold, dirt and moisture until they were
fired.[95]
Even if the eight Brownings worked perfectly, pilots soon discovered that they
were not sufficient to destroy larger aircraft. Combat reports showed that an
average of 4,500 rounds were needed to shoot down an enemy aircraft. In
November 1938, tests against armoured and unarmoured targets had already indicated
that the introduction of a weapon of at least 20 mm calibre was urgently
needed.[96]
A variant on the Spitfire design with four 20 mm Oerlikon cannon had been
tendered to specification F37/35 but the order for prototypes had gone to the Westland
Whirlwind in January 1939.[97]
In June 1939, a single Spitfire was
fitted with a single drum-fed Hispano in each wing, an installation that required large blisters
on the wing to cover the 60-round drum. The cannon suffered frequent stoppages,
mostly because the guns were mounted on their sides to fit as much of the
magazine as possible within the wing. In January 1940, P/O George Proudman flew
this prototype in combat, but the starboard gun stopped after firing a single
round, while the port gun fired 30 rounds before seizing.[95]
If one cannon seized, the recoil of the other threw the aircraft off aim.
Nevertheless, 30 more cannon-armed Spitfires were ordered for operational
trials, and they were soon known as the Mk IB, to distinguish them from the
Browning-armed Mk IA, and were delivered to No. 19 Squadron beginning in June
1940. The Hispanos were found to be so unreliable that the squadron requested
an exchange of its aircraft with the older Browning-armed aircraft of an
operational training unit. By August, Supermarine had perfected a more reliable
installation with an improved feed mechanism and four .303s in the outer wing
panels. The modified fighters were then delivered to 19 Squadron.[95]
Operational
history[edit]
Service
operations[edit]
The operational history of the
Spitfire with the RAF started
with the first Mk Is K9789, which entered service with 19 Squadron at RAF Duxford
on 4 August 1938.[4]
[nb 11]
The Spitfire achieved legendary status during the Battle of Britain, a
reputation aided by the famous "Spitfire Fund" organised and run by Lord
Beaverbrook, the Minister
of Aircraft Production.[98]
In fact the Hurricane outnumbered the Spitfire throughout the battle, and
shouldered the burden of the defence against the Luftwaffe; however, because of
its higher performance the overall attrition rate of the Spitfire squadrons was
lower than that of the Hurricane units, and the Spitfire units had a higher
victory-to-loss ratio.[99]
The key aim of Fighter Command was to stop the Luftwaffe's bombers, in
practice the tactic, whenever possible, was to use Spitfires to counter German
escort fighters, particularly the Bf 109s, while the Hurricane squadrons
attacked the bombers.[100]
Well-known Spitfire pilots included "Johnnie"
Johnson (34 enemy aircraft shot down),[101] who flew the Spitfire right through his operational career
from late 1940 to 1945. Douglas Bader
(20 e/a) and "Bob" Tuck (27 e/a) flew Spitfires and Hurricanes during the major air
battles of 1940, and both were shot down and became prisoners of war
while flying Spitfires over France in 1941 and 1942.[102]
Paddy Finucane (28–32 e/a) scored all his successes in the fighter before
disappearing over the English Channel
in July 1942.[103]
Some notable Commonwealth pilots were George Beurling
(311⁄3 e/a) from Canada, "Sailor" Malan
(27 e/a) from South Africa,[104]
New Zealanders Alan Deere (17 e/a) and C F Gray (27 e/a)[105][106]
and the Australian Hugo Armstrong (12 e/a).[107]
The Spitfire continued to play
increasingly diverse roles throughout the Second World War and beyond, often in
air forces other than the RAF. The Spitfire, for example, became the first
high-speed photo-reconnaissance aircraft to be operated by the RAF. Sometimes unarmed, they
flew at high, medium and low altitudes, often ranging far into enemy territory
to closely observe the Axis powers and provide an almost continual flow of valuable
intelligence information throughout the war. In 1941 and 1942, PRU Spitfires
provided the first photographs of the Freya
and Würzburg radar systems
and, in 1943, helped confirm that the Germans were building the V1 and V2 Vergeltungswaffe
("vengeance weapons") by photographing Peenemünde,
on the Baltic Sea coast of Germany.[108]
In the Mediterranean the Spitfire
blunted the heavy
attacks on Malta by the Regia Aeronautica
and Luftwaffe
and, from early 1943, helped pave the way for the Allied invasions of Sicily and Italy. On 7 March 1942, 15 Mk Vs carrying 90-gallon fuel tanks
under their bellies took off from HMS Eagle
off the coast of Algeria on a 600-mile flight to Malta.[109]
Those Spitfires V were the first to see service outside Britain.[110]
Over the Northern Territory of Australia, RAAF and RAF Spitfires helped defend the port town of Darwin against air attack by the Japanese
Naval Air Force.[111]
The Spitfire also served on the Eastern
Front: approximately a thousand were
supplied to the Soviet Air Force. Though some were used at the frontline in
1943, most of them saw service with the Protivo-Vozdushnaya
Oborona (English: "Anti-air Defence
Branch"). Spitfire MKVIII's took part in the last battle of WWII involving
the Western allies, in Burma as a ground attack role, helping to defeat a
Japanese breakout
attempt.
During the Second World War, Spitfires
were used by the USAAF in the 4th Fighter Group
until replaced by Republic
P-47 Thunderbolts in March 1943.
The Spitfire is listed in the
appendix to the novel KG 200 as "known to have been regularly flown
by" the German secret operations unit KG 200, which tested, evaluated and sometimes clandestinely
operated captured enemy aircraft during the Second World War.[112]
Speed
and altitude records[edit]
The Spitfire Mk XI flown by Sqn.
Ldr. Martindale, seen here after its flight on 27 April 1944 during which it
was damaged achieving a true airspeed of 606 mph (975 km/h).
Beginning in late 1943, high-speed
diving trials were undertaken at Farnborough to investigate the handling characteristics of aircraft
travelling at speeds near the sound barrier
(i.e., the onset of compressibility effects). Because it had the highest limiting Mach number of any aircraft at that time, a Spitfire XI was chosen to
take part in these trials. Due to the high altitudes necessary for these dives,
a fully feathering Rotol propeller was fitted to prevent overspeeding. It was during these trials that EN409, flown by
Squadron Leader J. R. Tobin, reached 606 mph (975 km/h,
Mach 0.891) in a 45° dive. In April 1944, the same aircraft suffered
engine failure in another dive while being flown by Squadron Leader Anthony F.
Martindale, RAFVR, when the propeller and reduction gear broke off. The dive
put the aircraft to Mach 0.92, the fastest ever recorded in a piston-engined
aircraft, but when the propeller came off the Spitfire, now tail-heavy,
zoom-climbed back to altitude. Martindale blacked out under the 11g loading,
but when he resumed consciousness he found the aircraft at about 40,000 feet
with its (originally straight) wings now slightly swept back.[113]
Martindale successfully glided the Spitfire 20 mi (32 km) back to the
airfield and landed safely.[114]
Martindale was awarded the Air
Force Cross for his exploits.[115]
A Spitfire was modified by the RAE
for high-speed testing of the stabilator
(then known as the "flying tail") of the Miles M.52
supersonic research aircraft. RAE test pilot Eric Brown stated that he tested this successfully during October and
November 1944, attaining Mach 0.86 in a dive.[116]
On 5 February 1952, a Spitfire 19 of
81 Squadron based at Kai Tak in Hong
Kong reached probably the highest altitude ever achieved by a Spitfire. The
pilot, Flight Lieutenant Ted
Powles,[117]
was on a routine flight to survey outside-air temperature and report on other meteorological
conditions at various altitudes in preparation for a proposed new air service
through the area. He climbed to 50,000 ft (15,240 m) indicated
altitude, with a true altitude of 51,550 ft (15,712 m). The cabin
pressure fell below a safe level and, in trying to reduce altitude, he entered
an uncontrollable dive which shook the aircraft violently. He eventually
regained control somewhere below 3,000 ft (900 m) and landed safely
with no discernible damage to his aircraft. Evaluation of the recorded flight
data suggested that, in the dive, he achieved a speed of 690 mph (1,110 km/h,
Mach 0.96), which would have been the highest speed ever reached by a
propeller-driven aircraft, but it has been speculated this figure resulted from
inherent instrument errors.[114]
That
any operational aircraft off the production line, cannons sprouting from its
wings and warts and all, could readily be controlled at this speed when the
early jet aircraft such as Meteors, Vampires, P-80s, etc, could not, was certainly extraordinary.
The critical Mach number of the
Spitfire's original elliptical wing was higher than the subsequently used
laminar-flow-section, straight-tapering-planform wing of the follow-on Supermarine Spiteful, Seafang and Attacker, illustrating that Reginald Mitchell's practical
engineering approach to the problems of high-speed flight had paid off.[119]
Variants[edit]
Overview[edit]
Main articles: Supermarine Spitfire (early Merlin powered variants), Supermarine Spitfire (late Merlin powered variants), Supermarine Spitfire (Griffon powered variants) and Supermarine Spitfire variants: specifications, performance
and armament
Although R. J. Mitchell is
justifiably known as the engineer who designed the Spitfire, his premature
death in 1937 meant that all development after that date was undertaken by a
team led by his chief draughtsman, Joe Smith, who became Supermarine's chief
designer on Mitchell's death. As Jeffrey Quill noted: "If Mitchell was
born to design the Spitfire, Joe Smith was born to defend and develop it."[120]
Pilots of 611 West Lancashire Squadron lend a hand pushing an early Spitfire Mark IXb, Biggin Hill,
late 1942 (RAF Official).
There were 24 marks of Spitfire and
many sub-variants. These covered the Spitfire in development from the Merlin to Griffon engines, the high-speed photo-reconnaissance variants and
the different wing configurations. More Spitfire Mk Vs were built than any
other type, with 6,487 built, followed by the 5,656 Mk IXs.[38]
Different wings, featuring a variety of weapons, were fitted to most marks; the
A wing used eight .303 in (7.7 mm) machine guns, the B wing had four
.303 in (7.7 mm) machine guns and two 20 mm (.79 in) Hispano cannon, and the C or Universal Wing could mount either four
20 mm (.79 in) cannon or two 20 mm (.79 in) and four
.303 in (7.7 mm) machine guns. As the war progressed, the C wing
became more common.[121]
Another armament variation was the E wing which housed two 20 mm
(.79 in) cannon and two .50 in (12.7 mm) Browning machine guns.[122]
Although the Spitfire continued to improve in speed and armament, because of
its limited fuel capacity its range and endurance were also limited: it
remained "short-legged" throughout its life except in the dedicated
photo-reconnaissance role, when its guns were replaced by extra fuel tanks.[123]
Supermarine developed a two-seat
variant known as the T Mk VIII to be used for training, but none
were ordered, and only one example was ever constructed (identified as N32/G-AIDN
by Supermarine).[124]
In the absence of an official two-seater variant, a number of airframes were
crudely converted in the field. These included a 4 Squadron SAAF
Mk VB in North Africa, where a second seat was fitted instead of the upper fuel
tank in front of the cockpit, although it was not a dual-control aircraft and
is thought to have been used as the squadron "run-about."[125]
The only unofficial two-seat conversions that were fitted with dual-controls
were a small number of Russian lend/lease Mk IX aircraft. These were referred
to as Mk IX UTI and differed from the Supermarine proposals by using an inline
"greenhouse" style double canopy rather than the raised
"bubble" type of the T Mk VIII.[125]
In the postwar era, the idea was
revived by Supermarine and a number of two-seat Spitfires were built by
converting old Mk IX airframes with a second "raised" cockpit
featuring a bubble canopy. Ten of these TR9 variants were then sold to the Indian Air Force
along with six to the Irish Air Corps,
three to the Royal Dutch Air Force and one for the Royal
Egyptian Air Force.[124]
Currently a handful of the trainers are known to exist, including both the T Mk
VIII, a T Mk IX based in the U.S., and the "Grace Spitfire" ML407,
a veteran flown operationally by 485(NZ) Squadron in 1944.[126][nb 12]
Seafire[edit]
The Seafire, a name derived
from Sea Spitfire, was a naval version of the Spitfire specially adapted for operation
from aircraft carriers. Although the Spitfire was not designed for the
rough-and-tumble of carrier-deck operations, it was considered to be the best
available fighter at the time, and went on to serve with distinction. The basic
Spitfire design did impose some limitations on the use of the aircraft as a
carrier-based fighter; poor visibility over the nose, for example, meant that
pilots had to be trained to land with their heads out of the cockpit and
looking alongside the port cowling of their Seafire;[127]
also, like the Spitfire, the Seafire had a relatively narrow undercarriage
track, which meant that it was not ideally suited to deck operations.[128]
Early marks of Seafire had relatively few modifications to the standard
Spitfire airframe; however cumulative front line experience meant that most of
the later versions of the Seafire had strengthened airframes, folding wings,
arrestor hooks and other modifications, culminating in the purpose-built
Seafire F/FR Mk 47.[129]
The Seafire II was able to
outperform the A6M5 Zero at low altitudes when the two types were tested against
each other during wartime mock combat exercises.[130]
However, contemporary Allied carrier fighters such as the F6F Hellcat
and F4U Corsair were considerably more robust and so more practical for
carrier operations.[131]
Performance was greatly increased when later versions of the Seafire were
fitted with the Griffon engines. These were too late to see service in the
Second World War.[132]
Griffon-engined
variants[edit]
The first Griffon-powered Spitfire, DP845,
flown by Jeffrey Quill, 1942
The first Rolls Royce Griffon-engined Mk XII flew on August 1942, and first flew
operationally with 41 Squadron in April 1943. This mark could nudge 400 mph
(640 km/h) in level flight and climb to an altitude of 33,000 ft
(10,000 m) in under nine minutes.[133]
As American fighters took over the
long-range escorting of USAAF daylight bombing raids, the Griffon-engined Spitfires
progressively took up the tactical air superiority role, and played a major
role in intercepting the V-1 flying bomb,
while the Merlin-engined variants (mainly the Mk IX and the Packard-engined Mk
XVI) were adapted to the fighter-bomber role.[134]
Although the later Griffon-engined marks lost some of the favourable handling
characteristics of their Merlin-powered predecessors, they could still
outmanoeuvre their main German foes and other, later American and
British-designed fighters.[123]
The final version of the Spitfire,
the Mk 24, first flew at South Marston on 13 April 1946. On 20 February 1948,
almost twelve years from the prototype's first flight, the last production
Spitfire, VN496, left the production line. The Spitfire Mk 24 was used
by only one regular RAF unit, with 80 Squadron replacing their Hawker Tempests
with F Mk 24s in 1947.[135]
80 Squadron continued its patrol and reconnaissance duties from Wunstorf in
Germany as part of the occupation forces, until it relocated to Kai Tak Airport,
Hong Kong in July 1949. During the Chinese Civil War,
80 Squadron's main duty was to defend Hong Kong from perceived Communist
threats.[136]
Operation Firedog during the Malayan Emergency
saw the Spitfire fly over 1,800 operational sorties against the Malaysian
communists.[137]
The last operational sortie of an RAF Spitfire was flown on 1 April 1954, by PR
Mk 19 Spitfire PS888 flying from RAF Seletar,
in Singapore.[138]
The last non-operational flight of a
Spitfire in RAF service, which took place on 9 June 1957, was by a PR Mk 19, PS583,
from RAF Woodvale of the Temperature and Humidity Flight. This was also the
last known flight of a piston-engined fighter in the RAF.[139]
The last nation in the Middle East to operate Spitfires was Syria, which kept
its F 22s until 1953.[137]
In late 1962, Air Marshal Sir John
Nicholls instigated a trial when he flew a
Spitfire PR Mk 19 against an English Electric
Lightning F 3 (a supersonic
jet-engined interceptor) in mock combat at RAF Binbrook.
At the time British Commonwealth forces were involved in possible action
against Indonesia over Malaya
and Nicholls decided to develop tactics to fight the Indonesian Air Force P-51
Mustang, a fighter that had a similar performance to the PR Mk 19.[140]
He concluded that the most effective and safest way for a modern jet-engined
fighter to attack a piston-engined fighter was from below and behind, contrary
to all established fighter-on-fighter doctrine at that time.[141][142]
Operators[edit]
Spitfires Mk Vc (Trop) of 352 (Yugoslav) Squadron RAF (Balkan Air Force)
before first mission on 18 August 1944, from Canne airfield, Italy
|
Survivors[edit]
Spitfire XIVe NH749 of the Commemorative Air Force, based at Camarillo airport, Southern
California, seen with period-dressed crew
members in 2011.
There are approximately 55 Spitfires
and a few Seafires in airworthy condition worldwide, although many air museums
have examples on static display, for example, Chicago's Museum
of Science and Industry has
paired a static Spitfire with a static Ju 87 R-2/Trop. Stuka dive bomber. [nb 13][144]
The oldest surviving Spitfire is a
Mark 1, serial number K9942; it is preserved at the Royal
Air Force Museum Cosford in
Shropshire. This aircraft was the 155th built and first flew in April 1939. It
flew operationally with No. 72 Squadron RAF until June 1940, when it was damaged in a wheels-up
landing. After repair, it was used for training until August 1944, when it
became one of several Battle of Britain
aircraft veterans that were allocated to the Air Historical Branch for future
museum preservation.[145]
What may be the most originally
restored Spitfire in the world is maintained in airworthy condition at Fantasy of Flight
in Polk City, Florida. Over a six-year period in the 1990s, this aircraft was
slowly restored by Personal Plane Services in England using almost 90% of its
original aircraft skins. Owner Kermit Weeks
insisted that the aircraft be restored to original condition as closely as
possible. Machine guns, cannon, gun sight and original working radios are all
installed.[146]
Surviving
Spitfires in Burma[edit]
After hostilities ceased in Asia in
1945, a number of Spitfire Mk.XIVs were reportedly buried, after being greased,
tarred and prepared for long-term storage, in crates in Burma. Excavations carried out in early 2013 failed to locate any
of the rumoured aircraft,[147] however investigation continues.
Memorials[edit]
- A fibreglass replica of the Mk.1 Spitfire Mk1 YT-J
(R6675), flown by Supermarine test pilot Jeffrey Quill
during his brief period of active service with 65 Squadron is on display
at the Battle
of Britain memorial at Capel-le-Ferne
near Folkestone, along with a replica Mk.1 Hurricane representing US-X, in
which Pilot Officer Geoffrey Page
was shot down on 12 August 1940.[148]
- Sentinel is a sculpture depicting three Spitfires in flight by Tim Tolkien
at the roundabout junction (popularly known as Spitfire Island) of the A47
and A452 in Castle Bromwich, Birmingham England, commemorating the main Spitfire
factory. The island sits at the adjoining southern corners of the former
Castle Bromwich Aircraft Factory and Aerodrome (now Castle Vale housing
estate).[149]
There is also both a Spitfire and a Hurricane in the nearby Thinktank Science Museum.[150]
- A sculpture of the prototype Spitfire, K5054,
stands on the roundabout at the entrance to Southampton
International Airport,
which, as Eastleigh Aerodrome, saw the first flight of the aircraft in
March 1936.
- Jeffrey Quill,
the former Supermarine test pilot, initiated a project to build an exact
replica of K5054, the prototype Spitfire to be put on permanent public
display as a memorial to R.J. Mitchell. A team of original Supermarine
designers worked with Aerofab Restorations of Andover for 10 years to
create the facsimile. It was unveiled to the public in April 1993 by Quill
at the RAF Museum, Hendon, and is currently on loan to the Tangmere
Military Aviation Museum.[151]
- A fibreglass replica in the colours of a Polish
Squadron Leader based at the station during the Second World War is on
display at RAF Northolt, the last Battle of Britain Sector Station still in RAF operational service.
- A replica Spitfire is on display on the Thornaby Road
roundabout near the school named after Sir Douglas Bader who flew a Spitfire in the Second World War. This
memorial is in memory of the old RAF base in Thornaby
which is now a residential estate.
- A fibreglass replica of a Spitfire has been mounted on
a pylon in Memorial
Park, Hamilton, New Zealand as a tribute to
all New Zealand fighter pilots who flew Spitfires during the Second World
War.
- At Bentley Priory, the Second World War command centre for Fighter
Command, fibreglass replicas of a Spitfire Mk 1 and a Hurricane Mk 1 can
be seen fixed in a position of attack. This was built as a memorial to
everyone who worked at Bentley Priory during the war.
- A fibreglass replica in the colours of 603 (City of Edinburgh)
Squadron Royal Auxiliary Air Force Spitfire Memorial next to the Edinburgh Airport control tower. This model replaced the original gate guardian
from the former RAF Turnhouse. It is painted to represent serial number L1067 (code
XT-D) "Blue Peter", the personal aircraft of the Squadron
Commander, Squadron Leader George Denholm
DFC.
- A fibreglass replica of a Spitfire Mk IX has been
mounted on a pylon in Jackson Park, Windsor, Ontario alongside a Hurricane as a memorial to Royal
Canadian Air Force
pilots. This display replaces an Avro
Lancaster bomber that had previously been on
display and is currently undergoing restoration.
- One of the few remaining Supermarine Spitfires with a
wartime record is on display (alongside a Hawker Hurricane) at the RAF Manston
Spitfire and Hurricane Memorial Museum, near Kent
International Airport.[152]
- Lodge Hill Garage, Abingdon,
Oxfordshire has a full-size replica
Spitfire as its own rooftop monument. Owner Peter Jewson bought the
replica in a campaign to build the first ever national memorial to honour
the 166 women from the Air
Transport Auxiliary
(ATA) who flew Spitfires and other aircraft from factories to their
operational airbases; 14 died during these ferry flights.[153]
- A fibreglass replica of a Spitfire Mk IX is mounted to
the roof of the speciality shop, Spitfire Emporium, in Kitchener, Ontario.[154]
- There is a replica of a Spitfire (and of a Hurricane)
at the entrance to the Eden Camp Modern History Museum as a memorial to pilots who served in the Battle of
Britain.[155]
- Montrose
Air Station Heritage Centre
has a full size replica Spitfire MkVb LO-D (EP121) on display as a
memorial to the men and women who served at RFC/RAF Montrose.
Replicas[edit]
Several small manufacturers have
produced replica Spitfires, either as complete aircraft, or as kits for
self-building. These range in scale from 3/4 full scale to full-size, although
most use wooden construction, rather than the original all-metal monocoque
design.
The British Historic
Flying Company has either restored or built from
scratch a significant proportion of the Spitfires that are now air-worthy.
Other examples include the Jurca Spit
from France, and those manufactured by Tally Ho Enterprises in Canada,[156]
SAC in California, USA,[157]
and even the microlight Silence Twister from Germany.[158]
Supermarine Aircraft originally from Brisbane,
Australia, and now based in Cisco Texas, manufacture the 80% scale Spitfire Mk 26 and the 90% scale
Mk 26B replicas. The Supermarine
Spitfire Mk 26 and 26B are supplied in kit form
and are the only all-aluminium reproduction Spitfires in production.[159]
The Isaacs Spitfire is a homebuilt 60% scale replica.
Notable
appearances in media[edit]
During and after the Battle of
Britain the Spitfire became a symbol of British resistance: for example, Lord
Beaverbrook's "Spitfire Fund" of 1940
was one campaign which drew widespread public attention to the Spitfire. The
Spitfire continues to be highly popular at airshows, on airfields and in
museums worldwide, and continues to hold an important place in the memories of
many people, especially the few still living who flew the Spitfire in combat.
Numerous, films and documentaries featuring the Spitfire are still being
produced, some of which are listed in this section.
- The
First of the Few
(also known as Spitfire in the U.S. and Canada) (1942) was a
British film produced and directed by Leslie
Howard, with Howard in the starring
role of R.J. Mitchell, and David Niven playing a composite character based
on the Schneider Trophy pilots of 1927, 1929 and 1931, and the Supermarine
test pilot Jeffrey Quill. Some of the footage includes film shot in 1941 of
operational Spitfires and pilots of 501
Squadron (code letters SD). Howard
spent a long time researching the history of the Spitfire's development
for the film; Mrs. Mitchell and her son Gordon were on the set during much
of the production.[160]
The aerobatic flying sequences featured in the last 15 minutes of the film
were made by Jeffrey Quill in early November 1941, flying a Spitfire Mk II
mocked up to represent the prototype.
- Malta Story
(1953), starring Alec Guinness,
Jack Hawkins, Anthony
Steel and Muriel Pavlow,
is a black and white war film telling the story of the defence of Malta
in 1942 when Spitfires were the island's main defence from air attacks.
- Reach
for the Sky (1956) starring Kenneth More
tells the story of Douglas Bader,
using contemporary Spitfire aircraft in the production.
- Battle
of Britain (1969) directed by Guy Hamilton
and starring Laurence Olivier, Michael Caine,
Christopher
Plummer, Ralph Richardson, Michael Redgrave, Susannah York
and many others. Set in 1940, this film features several sequences
involving a total of 12 flying Spitfires (mostly Mk IX versions), as well
as a number of other flying examples of Second World War-era British and
German aircraft.
- Piece
of Cake (1987) starring Tom Burlinson.
Aired on the ITV network in 1987. Based on the novel by Derek Robinson,
the six-part miniseries covered the prewar era to "Battle of Britain
Day," 15 September 1940. The series depicted air combat over the
skies of France and Britain during the early stages of the Second World
War, though using five flying examples of late model Spitfires in place of
the novel's early model Hurricanes. There were shots of Spitfires taking
off and landing together from grass airstrips.
- Dark Blue World
(2001), starring Ondřej Vetchý was a tale of two Czech pilots who escape
Nazi-occupied Europe to fly Spitfires during the Battle of Britain. Jan Svěrák
filmed some new aerial scenes and reused aerial footage from Hamilton's
film.[161]
- James
May's Toy Stories
(2009), starring James May was a BBC TV series which featured an episode in which
children constructed a 1:1 scale model of the Spitfire in the style of the
Airfix
1/72 scale model first released in 1953.
- Doctor Who
- "Victory
of the Daleks" (2010), was an episode
of a popular BBC TV series in which three Spitfires modified for
spaceflight aid in defending London from alien Daleks
during the Blitz.
- Guy Martin's Spitfire
(2014) was a Channel 4 documentary covering the two-year restoration of a
Mark 1 Spitfire, N3200, coded 'QV', that had been buried beneath the sand
for 46 years after crash landing on a French beach during the Dunkirk
evacuation in 1940. Guy Martin
tells the Boy's Own-style story of its pilot, Squadron
Leader Geoffrey Stephenson
and helps in the restoration of the aircraft.[162]
Specifications
(Spitfire Mk VB)[edit]
The Spitfire's performance improved
greatly as WWII progressed, for more information see Supermarine Spitfire variants: specifications, performance
and armament.
General characteristics
- Crew:
one pilot
- Length:
29 ft 11 in (9.12 m)
- Wingspan: 36 ft 10 in (11.23 m)
- Height:
11 ft 5 in (3.86 m)
- Wing area:
242.1 ft2 (22.48 m2)
- Airfoil: NACA 2209.4(tip)
- Empty
weight: 5,065 lb
(2,297 kg)
- Loaded weight:
6,622 lb (3,000 kg)
- Max.
takeoff weight: 6,700 lb (3,039 kg)
- Powerplant: 1 × Rolls-Royce Merlin 45[nb 14]
supercharged V12 engine,
1,470 hp (1,096 kW) at 9,250 ft (2,820 m)
Performance
- Maximum speed: 370
mph, (322 kn, 595 km/h)
- Combat radius: 410 nmi (470
mi, 760 km)
- Ferry
range: 991 nmi (1,135 mi, 1,827 km)
- Service
ceiling: 36,500 ft (11,125 m)
- Rate of climb: 2,600 ft/min (13.2 m/s)
- Wing loading: 27.35 lb/ft2 (133.5 kg/m2)
- Power/mass: 0.22
hp/lb
(0.36 kW/kg)
Armament
- Guns:
- 2 x 20mm Hispano Mk II cannon (60 rounds per gun)
- 4 x .303 in Browning Mk II* machine guns (350 rounds
per gun)
See
also[edit]
Related development
Aircraft of comparable role,
configuration and era
- Bell P-39
- Curtiss P-40
- Dewoitine D.520
- Focke-Wulf Fw 190
- Hawker Hurricane
- Heinkel He 112
- Messerschmitt
Bf 109
- Mikoyan-Gurevich
MiG-3
- North
American P-51 Mustang
- Yakovlev Yak-1
Related lists
- List
of most produced aircraft
- List
of aircraft of the RAF
- List
of aircraft of World War II
- List
of Supermarine Spitfire survivors
References[edit]
Notes[edit]
2.
Jump up ^ Although
this is often perceived as Summers implying the Spitfire was flawless, this is
an error. What he meant was that he wanted nothing touched, especially the
control settings, until he had consulted with Mitchell and the design team and
suggested some improvements.[17]
3.
Jump up ^ The
Air Ministry submitted a list of possible names to Vickers-Armstrongs for the
new aircraft, now known as the Type 300. One of these was the improbable Shrew.
The name Spitfire was suggested by Sir Robert McLean, director of Vickers-Armstrongs at
the time, who called his spirited elder daughter Annie Penrose "a little
spitfire".[20] The word dates from Elizabethan times and refers to a fiery,
ferocious type of person; at the time it usually meant a girl or woman of that
temperament.[21] The name had previously been used
unofficially for Mitchell's earlier F7/30 Type 224 design. Mitchell is reported
to have said it was "just the sort of bloody silly name they would
choose".[22][23]
4.
Jump up ^ The
pilot standing in front of the aircraft is pre-War Olympic hurdler, Sqn. Ldr.
Donald O. Finlay, the Commanding Officer of 41 Squadron from September
1940–August 1941, who adopted the aircraft as his personal mount. The same day
P7666 was delivered to the Squadron, 23 November 1940, Finlay destroyed a Bf
109 on his first operational sortie in the aircraft.
5.
Jump up ^ A
"Spitfire Lane" can be found on the road between Salisbury and Andover leading to the Chattis Hill
aerodrome.
6.
Jump up ^ The
test pilots were based at Highpost and flown by light aircraft to the other
airfields.
7.
Jump up ^ Glancey
notes that Rolls-Royce saw the potential of the He 70 as a flying test-bed for
prototype engines, sending a team to Germany to buy one of the aircraft direct
from Heinkel. The German government approved the deal, but only in return for a
number of Rolls-Royce
Kestrel
engines. He also notes that Shenstone had worked with Ernst Heinkel in Germany.[61]
8.
Jump up ^ Starting
with the Merlin XII fitted in Spitfire Mk IIs in late 1940 this was changed to
a 70% water-30% glycol mix.
9.
Jump up ^ The
fabric used for aircraft control surfaces had to be as light and as strong as
possible: Irish
linen
was often used, or Grade A cotton. Once the material was stretched and doped,
it was weatherproof and aerodynamically smooth. [71]
10.
Jump up ^ On
the ground the flaps were normally lowered only for inspection or for
maintenance. Pilots who forgot to raise the flaps after landing often found
themselves paying a fine.
11.
Jump up ^ This
aircraft survived the war, only to be scrapped in 1945. The first pilot to fly K9789
was Squadron Leader Henry Cozens, whose career had begun in 1917 with the Sopwith Camel and ended after flying Meteor and Vampire jets.[32]
12.
Jump up ^ The
second cockpit of this aircraft has been lowered and is now below the front cockpit.
This modification is known as the Grace Canopy Conversion, and was designed by
Nick Grace, who rebuilt ML407.[126] (For further details on surviving
Spitfires see List of surviving Supermarine Spitfires).
13.
Jump up ^ Both
of these airframes has a significant history in that they were acquired in the
Second World War and used in the first war drives, which preceded the US entry
into the conflict. The Spitfire, donated by the British government in 1940, was
the first example to come to the United States, and was used extensively as a propaganda tool, alongside the Stuka,
recovered from the Middle East.[143]
Citations[edit]
18.
Jump up ^ Fleischman,
John. "Best of Battle of
Britain."
Air & Space, March 2008. Retrieved 3 April
2008.
63.
Jump up ^ Lednicer,
David. "The Incomplete Guide to
Airfoil Usage."
UIUC Applied Aerodynamics Group, 15 September 2010. Retrieved 26 June
2011.
84.
Jump up ^ "NACA Report on lateral control
research, p. 131."
naca.central.cranfield.ac.uk.. Retrieved 27 June 2010.
116.Jump up ^ "UK Space Conference 2008: Test
Pilot Discussion."
space.co.uk. Retrieved 12 October 2009.
137.^ Jump up to: a b Whitehead,
Christopher. "The Supermarine Spitfire, an
operational history."
DeltaWeb International, 1996. Retrieved 30 August 2009.
143.Jump up ^ "Supermarine Mark 1A
Spitfire."
Museum of Science and Industry (Chicago).. Retrieved 30 July 2011.
145.Jump up ^ Simpson,
Andrew. "Supermarine Spitfire Mk.I
K9942/8383M Museum Accession NO.72/A/263". Royal Air Force Museum. Retrieved
2013-06-19.
147.Jump up ^ "Search for 'buried Spitfires'
in Burma called off".
BBC News, 16 February 2013. Retrieved 2 March 2013.
155.Jump up ^ "Eden Camp Modern History Theme
Museum, Malton, North Yorkshire". Aviation Museum Guide UK. Retrieved 5 November 2013.
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External
links[edit]
- The
Spitfire Site – resource library about the Supermarine Spitfire
- Spitfire
Society
- Spitfire
Society - Eastern Wing
- Spitfire/Seafire
Serial Numbers, production contracts and aircraft histories
- K5054
– Supermarine Type 300 prototype Spitfire & production aircraft
history
- Spitfire Performance Testing
- Supermarine Spitfire – History of a legend (RAF Museum)
- The Supermarine Spitfire in Indian Air Force Service
- Spitfire
Pilots, articles about Spitfires and its pilots
- RAF Museum Spitfire Mk VB walk-around photos
- Examples of Photographic Reconnaissance Spitfires
- Sound recordings of Supermarine Spitfire Aircraft
- Wasp
Wings, a 1945 National Film Board of
Canada documentary film on the role of Supermarine Spitfires in the Second
World War
- Pacific
Spitfires – The Supermarine Spitfire in RAAF Service
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