RE: Thunder Tiger GP-18, anyone tried it???
Sounds like a good engine, but now I have an ASP .21 that I'm really happy with. It weighs 8.1 ozs. with muffler. Throttling, starting and power are terrific. 14,900 on Bolly 8.5 x4, and 13,800 on an MA 9x4. It's had only a brief break-in at this point. Even the stronger 15s weigh about 7 1/2 oz. For an engine around this weight, it definitely gets my vote.
Jim