which was powered by the 890-hp Bristol Mercury XII engine, had a top speed of 219 mph, range of 600 miles with a service ceiling of 26,000 ft. Armament was four 0.303-in machine-guns and 500lb bombs.

aircraft also served as test beds including with the Bristol Aeroplane Company who would use a number of airframes to test engines. These included the engine intended to power the Fairy Albacore, the

and both prototypes would be powered by the 840-hp Bristol Mercury IX engine, with the 9th February 1937 seeing the maiden flight of the first prototype. Prior to this 190 aircraft had been ordered in

The Bristol Hercules VI was to power two with the Rolls-Royce Merlin XX powering the other two, in the end the Merlin XX would be fitted to all four aircraft. Flying from Ringway Airport the prototype

With the Air Ministry looking to replace the Bristol Bulldog fighter, Specification F.20/27 was issued for which Gloster submitted their 450-hp Bristol Mercury powered SS.18 design and this made its maiden

this used four Bristol Hercules engines, and flew for the first time on the 26th November 1941. The first production Lancaster B.II flew on the 2nd September 1942 and was powered by the 1,735-hp Bristol

the aircraft was powered by the 690-hp Bristol Pegasus IIIM3 engine. This gave the Swordfish Mk I a top speed of 139 mph, range of 546 miles with a service ceiling of 10,700 ft. Armament consisted of

still in development, the Bristol Bulldog, which had a top speed of 174 mph. The Hart would then be sent to the Aeroplane and Armament Experimental Establishment to undergo testing on the 8th September

Powered by four 1,375-hp Bristol Hercules II engines, and with John Lankester Parker the pilot, and now called the Stirling, the prototype flew for the first time on the 14th May 1939. However, on landing

5 Westland Lysander 4 Bristol Blenheim 4 Hawker Hurricane Advanced Air Striking Force (12 squadrons) 8 Fairey Battle 2 Bristol Blenheim 2 Hawker Hurricane The two letters in () are the squadron