RE: DLE 35RA going to 3 blade prop
irocbsa, the RCGF prop came from BP Hobbies. It looks just like the Biela prop but is red instead of black. Cost $50 instead of $75. Also turns the same rpm. For a scale looking prop on a warbird especially with a large radial cowling the longer blades look better, I think. The Biela and RCGF props have wide blades and put a heavy load on the engine as you can see from my posted rpm numbers.