Is there some way to incorporate the propeller sound in with the engine sound? It would sound more realistic that way IMHO.
A long time ago I made some AH sounds and added propeller noise lifted from another game. I don't know if they ever got around or not. You just have to have software that will allow you to paste a mix or a track mixer. It's tedious, but it most certainly can be simulated within reason. The issue is you can't get it to respond to RPMs. And if you think finding engine sounds is hard, try finding a propeller sound that has no engine sound to it so that you can mix with other plane sounds. I got mine from a MS sim as they did various file mixing for engine sounds, Propeller noise was actually it's own file as I do beleive RPMs was in the mix.
from what I remember anyway