I had six G15's.
It's speed, racing, and free flight engine. Using it for combat was a piece of work. They like high RPM will not allow themselves to be under-REV'ed.
Perhaps in a Clown racer for the Brodak?
If both of yours work, that's only .38, total. Could be a nice P-38 for P40 Stunt, and legal on .015" lines. Forget mufflers, hand out ear plugs.