69 Sleeper Bee
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P39 is one of my favorites. Very interesting design. From what I have read in documentation and from interviews with pilots, it handled well but was not good at high altitude, lost power to climb. One pilot mentioned he wished they would have tried a supercharger on it to fix the altitude problem because at lower altitudes it was a powerful aircraft in combat.
The original design did have a two speed turbo-supercharger, but when sent for evaluation to NACA, they recommended ditching the turbo to get rid of the side scoops, claiming they caused too much drag. Scoops shown here on the prototype.P39 is one of my favorites. Very interesting design. From what I have read in documentation and from interviews with pilots, it handled well but was not good at high altitude, lost power to climb. One pilot mentioned he wished they would have tried a supercharger on it to fix the altitude problem because at lower altitudes it was a powerful aircraft in combat.
Guess they should have listened to the pilots then instead. I had read it was successful in Russia. I take any wartime statistics coming from them with a grain of salt though. No reason to doubt it's success, but I suspect between German propaganda and Russian propaganda of the time either no planes or all the planes were shot down haha.The original design did have a two speed turbo-supercharger, but when sent for evaluation to NACA, they recommended ditching the turbo to get rid of the side scoops, claiming they caused too much drag. Scoops shown here on the prototype.
View attachment 1910250
The Soviets still made good use of the 5,000 examples they received, managing 6,000 kills against German aircraft. They also modified the fighter, removing the wing guns to increase roll rate and maneuverability.