Hi: Mine has a 91 four stroke magnum. Engine is mounted upright with muffler coming out right side. I have the fixed gear I always like the fixed gear version art schole flew. It has a 41x6 master airscrew wood prop. With the fixed gear the gear actually are forward of the leading edge. This makes for a very stable ground handling landing and takeoff. It flies great. I will send pix's. thanks...