Watch your weight!

With a gasoline engine, it's easy to add extra pounds to the airplane. We recommended only glow two-stroke or glow four-stroke engines, but even the large SuperTigre glow engines were getting a bit high on the weight. We flew that airplane with the old O.S. Max 1.08 FSR or the FS-120 Surpass-series of engines. It would fly very nicely on the 1.20 AX or the FS-200, as well as the FS-120 Surpass E or FS-120 Surpass III. Those engines will be quite a bit lighter than a gasoline engine.

Keep the airplane below 13 pounds, and even lighter is better. The designed weight range is 11.5-13 pounds. Get it heavier and you'll have a very noticeable degradation in performance!