Tanks - I will probably go with the Saito 91's because of the altitude. What would be the differences between a 12 x 12 two blade prop and a 12 x 8 three blade prop? I was leaning towards the two blade since the actual aircraft has two blade props.

I also wanted to ask what torque I needed for the flap servo. The total area of the flaps is about 2.5" x 36".

Thanks - NJD