RE: GP has brought back the Curtiss P-6E Hawk!
I was thinking a YS 140 may sound good, good low thumpy rpm with torque and give some "punch" when needed. Perhaps the Saito 1.80 glow or saito FG 30/36 gasoline. I dont like the sound of the 2 stroke nitro or gas for this plane (DL30/ Syssa or similar)