Supermarine Spitfire – aircraft profilePosted in: Interwar Aviation | Tuesday April 09, 2013
Tags: aircraft profiles, fighter, Military Aircraft 1919-1938, UK
Supermarine Spitfire historical facts
Of all the fighters that have served with the Royal Air Force since its formation in 1918, none has achieved wider, no more widely deserved, fame than the Supermarine Spitfire. No better example can be found of ”the right aeroplane being available at the right time”; it was the Spitfire, more than other single type, that allowed the RAF’s fighter squadrons during World War Two first to blunt the spearhead of the Luftwaffe’s attack on Britain and then to gain and maintain ascendancy over the German air force.
The Supermarine Spitfire existed in more than 40 major variants, but it served the RAF in only two principal roles, those of fighter and photographic reconnaissance. The Spitfire was a pilot’s aeroplane; not the easiest to fly, and a little unforgiving of tyros, it was universally liked by those who flew and fought in it for its all-round performance, its manoeuvrability and its lack of vices.
The Supermarine Spitfire began as a private venture replacing an earlier unsuccessful design to specification F.7/30, and emerged to fill a new one, F.37/34. An initial production order covered 310 for completion by March 1939, and production began in 1937. The first unit to be equipped was No 19 Squadron, Duxford in August 1938, a big step up from its Gloster Gauntlets.
The Supermarine Spitfire prototype K5054 (Supermarine Type 300) was powered initially by a 990 hp (738 kW) Merlin ‘C’ engine. Captain J. ‘Mutt’ Summers flew it for the first time on 5 march 1936 at Eastleigh aerodrome, Southampton. The type 300 soon displayed superb handling qualities and performance, achieving a level speed of almost 350 mph (563 km/h), and on 3 June 310 Mk I aircraft were ordered to Specification F.16/36. This represented the first of nearly 23,000 of all marks, developed largely by Joe Smith, who succeeded the Supermarine chief designer – R.J.Mitchel – on the latter’s death on 11 June 1937.
These early Spitfire Is were powered by a 1,030 hp (768 kW) Rolls Royce Merlin II, driving a two-blade fixed-pitch wooden propeller. Ejector exhaust stubs were introduced, as well as a tailwheel in place of the prototype’s skid. Only four of the planned eight 0.303 in (7.7 mm) machine-guns were installed as a result of supply shortages, and trailing-edge flaps and landing gear were raised and lowered manually. Improvements were introduced quickly, including a bullet proof windscreen, a bulged canopy, armour plating behind the engine, hydraulics for actuation of flaps and landing gear, and a Merlin II engine driving a three-blade variable-pitch de Havilland metal propeller. The eight-gun aircraft were designated Spitfire IA, and 30 Mk IBs, with two machine-guns and one 20 mm cannon in each wing, were delivered in 1940 for operational trials.
By the outbreak of World War Two, nine full squadrons had been equipped, and Supermarine Spitfire of No 602 Squadron claimed the first victories of the war on October 16, 1939, destroying two Junkers Ju 88s and a Heinkel He 111. Further large orders were placed as the type was developed, and its role in the Battle of Britain alongside the Hawker Hurricane is history. Various marks of Spitfire served with 111 squadrons during World War Two, others continued postwar.