I race 1/6 scale Radio controlled hydroplanes as my other addiction. Went to a race a couple weeks ago and did pretty well with my new boat. It's modeled after the 1959 Maverick. I cleaned house and won all 4 heats that day. (8 out of 10 over 2 days) This was the final on Saturday. These are about 55 inches long with modified 29cc 2 stroke motors running around 65 mph. I got out to a good lead, (like I did every other heat) then my spark plug coil came loose after lap 3 and I started loosing power. 2nd place started catching me pretty quickly and made for an exciting finish.
https://www.youtube.com/watch?v=vi9sFQfuJ-4