Translations:KAVAN AP06A - Instruction Manual/44/en

Propeller Size Recommendations

Optimal diameter and pitch of the propeller needed depends on the model. The weight, or rather the wing loading and the aerodynamic clarity of the model play a role. Different requirements apply to slow high-wing aircraft (Piper – larger propeller with lower pitch) and to aerobatic "speedsters" (smaller diameter, higher pitch). It is likely that you will have to experiment a little to achieve a complete satisfaction. Using a propeller that is too small will force the engine to run at too high RPM. A propeller that is too large will "choke" the engine – the RPM will be too low. In both cases, this will lead to difficult carburettor adjustment and excessive engine wear with the risk of failure.