[Patchman123]

How about using this sound for the Bell P-39's 37mm cannon? I see the 37 being used for an aerial cannon, but in RL it was not very effective as an aerial cannon because of its velocity. Chuck Yeager joked that the cannon's velocity was like throwing a grapefruit.

http://youtu.be/JwksKXoDALI?t=5m54s