Airscrew Driven RC Boat

I came across some some horribly low-res old plans, in a language I don't understand, to build a radio-controlled boat that uses a gas airplane motor and propeller for propulsion. I don't have a gas motor either and have never built a boat, so naturally I couldn't get the project out of my head.It has taken a lot of tweaking, but I think the boat is finally working well enough to share here.I have taken the wonky old scanned plans and completely recreated them in 3D CAD. The plans I have att...