ORIGINAL: BME
The .90 turns a 13x6 APC at 12,500 -12,800 rpm on gasoline and stock Supertigre muffler.
Keith
BME
My Tower Hobbies turns a Pro Zinger 13-5 at those exact same RPM on stock exhaust and 5% fuel.
Weighs 23oz.
Costs $95
I'd have to do an awfull lot of flying to justify the extra $270.