Back in the early 80's there was a FF rubber model of a Shinden published in , I think, Model aviation. I build a CL version and flew it with a Cox .049. Since then it has been through a couple of conversions, crashes and repairs, but still keeps on flying. I did a quick rehab for my club's 1/2A day this coming Saturday. Currently it is electric. I am using a Turnigy 2211-2300 motor, 2 or 3 cell LiPo, 12a esc, and 2.4Ghz throttle. With only 60 sq in wing area it only goes round and round, but with throttle touch and goes are possible.