RE: McCulloch 32cc on a 85" 14.5lb Extra 330?
ok, conversion of the engine is about done, other than mounting the engine to the firewall and getting a RC plug and balancing the flywheel... machined out the prop adapter today and cut down the cooling fins about where I want them (basically made them round). the engine complete with prop adapter (minus prop and bolt) with carb, muffler and flywheel comes to about 4.3 pounds, add 3 for the fuse, 3.5 for wings and tail and a couple more for radio and other assorted hardware and you get somewhere around 13 pounds, I think the prop adapter ended up lighter than I expected, it'll probably end up closer to 14 lbs when all is said and done, but whatever... still better than I first thought
I think I'm going to fiberglass the firewall just to be sure, after putting the screws in and adding the triangle stock... overkill is always better. I'll figure out the final firewall ideas after the holes are drilled for the engine mount...