Rhino vs. Beaver

Motra wrote:Does anyone know if the Cox Rhino was made by Cox as an airplane engine or if it was modified by an outside vendor? I thought that it was just a stripped Beaver chainsaw engine until I disassembled one and found some differences. I thought it was odd that they would mount the propeller on the flywheel side of the crank because it's the "floating" side, whereas the PTO side has the crankpin (just like their smaller engines). The PTO side rides in its own bearing housing that's removeable from the engine block. Upon closer examination of the pictures I noticed that the Rhino case has been machined to accept the PTO bearing housing on the other side of the engine, so the propeller really is mounted to the PTO side. The other side of the crank is probably excluded on the Rhino engine. Look at the pictures (the first one was "borrowed" from the web).