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Republic P-47 Thunderbolt

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Nicknamed the 'Jug' the P-47 Thunderbolt entered service with the United States Army Air Force in May 1942 and would later be able to escort bombers all the way to Germany. It was used by a number of air forces, including the Royal Air Force who used the Republic P-47 Thunderbolt in the ground attack role in the Far East.

Quick Facts
Republic P-47 Thunderbolt side profile image
First flight
6th May 1941
Entered service
26th May 1942
Total built
15,677

Front view
P-47 Thunderbolt front view photo
Side view
P-47 Thunderbolt side view photo
Rear view
P-47 Thunderbolt rear view photo

The development of the P-47 began in 1939 with the 1,150-hp Allison V-1710-39 powered XP-47 fitted with two 0.50-in machine-guns. November 1939 saw the United States Army Air Corps contract Republic to build a prototype XP-47 and also a prototype XP-47A. With the outbreak of the Second World War (1939 – 1945) and the war in Europe intensifying during 1940 reports of the air combat taking place showed that the XP-47 and XP-47A would be vulnerable. This was due to their poor armament, lack of self sealing fuel tanks and lack of heavy armour. As a result both prototypes were cancelled as they were being built.

The design team at Republic, lead by Alexander Kartveli, went back to the drawing board and proposed a new aircraft powered by the turbocharged 2,000-hp Pratt & Whitney R-2800 Double Wasp engine. A contract to build a prototype XP-47B, as this new aircraft was known, was issued on the 6th September 1940 by the USAAC. The 6th May 1941 saw the prototype make its maiden flight. The following year on the 8th August 1942 the XP-47B crashed but by this time the first production versions of the 773 which had been ordered were already beginning to enter service.

The production P-47B had a top speed of 429 mph, range of 835 miles and a service ceiling of 42,000 ft. Armament consisted of eight 0.50-in machine-guns. These entered service on the 26th May 1942 when the 63rd Fighter Squadron received the first deliveries. The P-47C was the next Thunderbolt variant and this featured a few modifications over its predecessor. This included the ability for the P-47 to carry external fuel tanks, this gave the aircraft the range to operate over Germany. The P-47C's range, service ceiling and armament were the same as the P-47Bs, however it had a slightly increased top speed of 433 mph.

The P-47D was the next in line, its top speed was the same as its predecessor, it had a range of 800 miles and a service ceiling of 43,000 ft. Armament was eight 0.50-in machine-guns and either 2,500lb bombs or ten 5-in rocket projectiles. Despite increasing their factory at Farmingdale, New York Republic were unable to keep up with demand. This lead to a new factory being built at Evansville, Indiana. Curtiss-Wright would also build the P-47 at their factory in Buffalo, New York and P-47s built by Curtiss-Wright were given the designation P-47G. The P-47D entered service during 1943.

Up until now the P-47 had a “razorback” design but during July 1943 one P-47D was tested with the same bubble canopy that was fitted to the Hawker Typhoon under the designation XP-47K. This gave improved rear vision as did the flatter rear fuselage needed to allow the new canopy to be installed. As a result all future production P-47s would feature the new canopy and fuselage design.

The Royal Air Force also used the P-47D in the Far East and these were known as Thunderbolt Mk Is, “Razorback” P-47Ds, and Thunderbolt Mk IIs, bubble canopy P-47Ds. With the addition of three 500lb bombs they were used as fighter-bombers and would go on to equip at least sixteen squadrons.

A number of development P-47s followed but none went past the prototype stage. One of the most notable was the XP-47J powered by the 2,100-hp Pratt & Whitney R-2800-61 engine, this had six 0.50-in machine-guns instead of the usual eight. This would make its first flight on the 26th November 1943, when in level flight it reached a speed of over 500 mph it became the first piston engined aircraft to do so. In the end an XP-72 project was favoured over the XP-47J.

The P-47M and P-47N were the last two variants to go into production. The P-47M was heavily based on the P-47D and was powered by a 2,800-hp Pratt & Whitney R-2800-57 engine giving the aircraft a top speed of 475 mph, range of 530 miles and a service ceiling of 41,000 ft. Armament was either six or eight 0.50-in machine-guns. This was the fastest P-47 variant and was developed to help combat the new German jet and rocket fighters entering service and the V-1 flying bomb which was nicknamed the 'Doodlebug'.

So the P-47N would be the last of the Thunderbolts built. Powered by the same 2,800-hp Pratt & Whitney R-2800-57 engine as its predecessor the P-47N had a top speed of 467 mph, range of 800 miles and a service ceiling of 40,000 ft. Armament was either six or eight 0.50-in machine-guns and either 2,000lb bombs or ten 5-in rocket projectiles. With the addition of external fuel tanks the P-47N would be able to escort the Boeing B-29 Superfortress squadrons in the Pacific.

The Republic P-47 Thunderbolt would be used by a number of air forces worldwide. These included the Free French, Italian Air Force and Brazilian Air Force. In total 15,677 P-47 Thunderbolts were built and the P-47D and P-47N, later F-47D and F-47N, would eventually be retired by the American Air National Guard in 1955.



Variants

Click on the aeroplane image to view a larger version.

Top Speed Range Service Ceiling Armament
XP-47 Prototype which was cancelled as it was being built.
XP-47A Prototype which was cancelled as it was being built.
P-47B 429 mph 835 miles 42,000 ft eight 0.50-in machine-guns
P-47C 433 mph 835 miles 42,000 ft eight 0.50-in machine-guns
P-47D 433 mph 800 miles 43,000 ft eight 0.50-in machine-guns
2,500lb bombs or
ten 5-in rocket projectiles
P-47D side profile image
XP-47E Sole P-47B with a pressurised cockpit.
XP-47F Sole P-47B fitted with a laminar flow wing.
P-47G P-47C and P-47Ds built by Curtiss-Wright under licence.
XP-47H A pair of P-47Ds powered by the Chrysler XIV-2220-1 inverted vee inline engine.
XP-47J Prototype with only six 0.50-in machine-guns and powered by the 2,100-hp Pratt & Whitney R-2800-61 engine.
XP-47K P-47D with a Hawker Typhoon bubble canopy and rear fuselage cut down.
XP-47L Increased capacity fuselage fuel tank installed on a P-47D.
P-47M 475 mph 530 miles 41,000 ft six or eight 0.50-in machine-guns
P-47N 467 mph 800 miles 40,000 ft six or eight 0.50-in machine-guns



Photos

Click on a photo to view a larger version.
P-47D
P-47G



On Display

(C) = Cockpit only exhibit. (F) = Fuselage only exhibit. (R) = Remains of an aircraft.

Variant Location
P-47D x 2 Imperial War Museum, Duxford
P-47D Royal Air Force Museum, London

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