OK then, the real world:
Production: P-39N: 500, P-39N-1: 900, P-39N-5: 695 & Yak-9: 459 aircraft produced.
First Deliveries: P-39N: Nov.1942 (U.S.), Late 1943 (U.S.S.R.) & Yak-9: Dec.1942.
Performance:
P-39N & (Yak-9 Series I)
Altitude: Speed / Climb.
Meters: MPH / FPM
S.L......344 / 3980 (325...