RE: GP Ultimate Bipe Setup
I maidened mine Sunday after a 1.5 year build (life kept getting in the way.)
Magnum .61 2 stroke on mine, with a 12x6 APC prop. Stans cowling, and U-can-do .46 wheelpants (~$15 from Tower)
Came out to 7.35lbs RTF on a calibrated/certified digital scale.
flew very nice after some trimming - but needed about 6 clicks of down, and kept trying to climb at full throttle. Inverted it wanted to dive with centered sticks, so I'm thinking it needs a little downthrust added to the motormount.
They day was breezy - with some 6-8mph gusts, and the little plane didn't seem to mind at all. I had mixed in a little up elevator to rudder mixing, but it was pulling to the canopy in Knife-edge flight so I took the mixing out for now. Once I get the downthrust put in, I might need to add the mixing back.
Snaprolls were awesome, and if you hold the elevator a little longer than you normally need, it just comes to a dead stop in a hover, every time. Not that this is a 3-d plane, but I wish my U-can-do 60 had this trait.
It liked to be landed pretty hot though, but had the best ground handling traits I have had in a while - plane taxiied and rolled out better than a lot of my other planes.
Landing gear seemed a little soft, and I did bounce it in on a dead-stick landing (lean low-speed needle).
In all - great flying plane, and though I'm now moving into larger scale airframes, I'm not going to be in a hurry to get rid of this one.