RE: Aeroworks Stearman ARF
Flew my Aeroworks Stearman (N2-S if you please) using the Saito 450 3 cylinder radial. 20.7 pounds dry.
It needed every bit of the Saito's weight to balance.
No more than 1/2 throttle needed at any time and at low/slow fly by's, the engine sounded like the real thing.