Why would you need the gearbox? Couldn't you just attach the propeller directly to the flywheel, or to the front of the crankshaft somehow. I have ridden BMW twins for years, and they chug along quite comfortably at 3200-3400 rpm. It seems like that would be just about right for a KR1. and I would think the light weight would be an asset. If C.G. is a problem couldn't you just extend the front end a tad to give the engine more Arm and balance it out?
Todd Thelin Spanaway, WA In a message dated 7/2/2011 7:42:43 A.M. Pacific Daylight Time, kleirf...@ecomail.org writes: Another issue that came to mind about the BMW engine is that gearbox, it is just another thing to break, where an O-200 would just be a direct drive.
