The YS 110 13X13N @ 13,000 is 3.65 HP, P.S.(pitch speed) 160 MPH. Dang that’s impressive. No wonder many seem to last one season on 60%.
The 91 heli motor 11X9 @ 16 is 3.32 HP P.S. 136 MPH, I think you will need at least this disk area.
The 91 heli motor 10X10 @ 16 is 3.5 HP P.S 151 MPH. Again, more disk area?
The 120 AX 11X 12 @ 12.5 is only 2.08 HP P.S.142 MPH not bad if it unloads a ton.
My OS 91 FX on marine tuned pipe 11X9 @14250 with 2.35 HP, I’ll try a 11X12 on it to see the numbers.
The OS 1.08 FSR is rated at 3HP
Webra makes a 120 heli but its rated at 3.6 HP, the tuned pipe would be huge, and I don’t know if they will allow that engine. Hard to beat that YS 110.
The Helis and the 110 will suck down fuel, even with a larger tank you will have limited flight time.
Decisions, Decisions
