In order to really make it work, you need to take off anything that adds friction or weight. so take out the driveshafts, transmission, add some cheap airplane wheels, etc. Check out the norvel line of engines-
www.norvel.com
I have owned a Big Mig .061 rc and it's a good engine, but you might be better off with the .074's advantage in power. I was just breaking in the .074 and seems like a great little engine, plus you can run a bigger prop on it, like a 7x2-3. It will run for a long time on a 2oz tank.
What about a tail rotor???
