I guess you're talking a 160 two stroke glow vs. the gas equivalent. Somehow the 3 to 1 ratio doesn't seem reasonable to me. A DA50 (50X3=150) develops 5 HP, will swing a 22X8 or 10 prop typically, and is recommended for a 14 to 18lb plane. Will a 160 glow engine do as much? I don't know because I never had a big two stroke glow engine (the biggest I ever owned was an OS 1.08). I owned two 300 Saito twins and they were sweet engines, in fact, I still own one which is on the shelf (want to buy it?) The 300 Saito will fly a plane about the same size as a DA50 but not as forcefully, in my opinion. It does not have as much power but it is a heck of a lot smoother. It also will burn several times the fuel at several times the cost per gallon.