ORIGINAL: CorsairJock
What prop on the Saito 1.50?
Graupner 15x8 3-blade should work. Graupner 16x8 3-blade and MA 16x10 3-blade will be too big. Too bad MA doesn't make either a 15x8 or a 16x8 3-blade.
Try to keep the rpm in the mid to high 8K. Otherwise you will be lugging the engine, and no engines want that.