Hi B58

That would depend upon what airframe you were considering putting it in. If it's a DF style airframe designed around a Ramtec(Dynamax)/OS91 setup, then it's probably a good buy. If your looking at some larger airframe, then I might suggest that you look for a larger engine. There's also the lack of warranty support for these enges, although I know Carlos does an excellent job with them.

Think about where you want to got and if the 500 will suit what you want to do. BTW, what airframes were you thinking of?

Ed