Spitfire PR. Mk. XI Performance Testing

Aeroplane and Armament Experimental Establishment
Boscombe Down

August 1943

Spitfire PR. Mk. XI MB.789
(Merlin 63)

Level speed performance and position error


The maximum true air speeds under each condition were:

All-out level speed in F.S. gear     417 mph ASI at 24,200 ft.
Max. cruising speed in F.S. gear   397 mph ASI at 31,000 ft.
The maximum speeds at 38,000 ft. were:-

All-out level     387 mph ASI
Max. cruising   378 mph ASI

For the full report click HERE


Spitfire PR XI Aircraft Data Card

[WWII Aircraft Performance]