I'm sick of people saying that their 60 inch, 46 size plane doesn't have enough power to climb out with a 91 Surpass. The plane, unless you build really really heavy shouldn't come out at more that 7 pounds. And what kinda prop are you using, an 11 incher? A 7 pound plane will hover with a Saito .72 or OS .70 . If they're spinning a 14 incher. A 13x6 would still hover them probably. An OS 91 spinning a 14x6 at a conservative 9,500 puts out at least 10 pounds of thrust. Can't climb out vertically? That sounds funny.

An OS 91 FX with a 14x6 APC will give you just over a 2:1 with a 7 pound plane. My 6-6.5 Kaos will climb vertically but slowly at half throttle with this combo. I'm thinking of buying one of these Giles 202's and putting a YS 91 up front. That should be another overpowered plane.