ORIGINAL: ki3w
Tower is selling the combo with an OS 91 2 stroke. Anyone try this? From the specs, this engine has tons of HP. ??
I have both, that is the GP Stearman with a pumped 1.20 and the pumped 91 in a Spacewalker.
I do doubt the 91 would be good in the Stearman. You need a fair amount of noseweight with the 120 and the power is adequate but not excessive. I suspect the 91 would be quite marginal