640cc Uber Pimp
This one is the 170 boxer, the 210 boxer will be going into the Bulldog if I ever get around to building it. I did speak with Toni and he simply relayed Valach's spec. There are some real world numbers on Toni's engine page from a builder/flyer but he does not venture into 3 blade's, only two. The prop Valach list is a 30x14, 3 blade, and after I tried it I doubt they ever put one on an engine. The 32x12x3 pulls so hard it is difficult to hold the aircraft back, the 30x14x3 I could hold with two finger's.