RE: Thunder Tiger 90 Pro
You got that right.
[quote]ORIGINAL: XJet
It's an interesting situation.
I've also heard that the OS91 is not their best engine -- and having seen one run this weekend I have to agree. They're not particularly powerful and the one I saw was totally put to shame by an ST90 that was being run-in in the air so was clearly not tuned for anything like max rpms.