YS 140 Limited Test Run

I bought this engine with no particular plane in mind. I just wanted to own a YS. It was a piece of cake to tune. It's got a solid 1800 rpm idle and instant throttle response. In this video, it's turning an APC 16x10 at 8600 rpm. I've tested with an MAS 16x8x3 and it will spin that at 8200 rpm.