To add to my question, 0.61-0.91 2-stroke glow, 1.00-1.25 4-stroke glow, 15cc 2-stroke gas is what the plane calls for as far as engines go. I have heard gas has even less punch than glow so would a 4 stroke 1.00 glow engine be more powerful, for lack of a better word, than a 4 stroke gas equivalent to 1.00?