ORIGINAL: chall
Nope, the propeller can't be installed backwards on this plane. But you can break it! ;-)
There is no "UP" stick on this two-channel plane. The left control is a throttle, the right controls the rudder-vators (I guess you'd call'em). It has a V-tail.
My current theory is that the tail assembly is not being held in proper alignment with the fuselage. These planes have a long thin carbon-fiber tube connecting the tail and fuselage, and there are little bolts to fix the tube at both ends to it won't rotate.
I think it's rotating despite the little bolts, so the tail is out of alignment and sends the plane down to the left or right, hard.
I think I have enough propellers, white glue, and packing tape to make some more attempts. Maybe I can put a drop of CA on that shaft at the tail join and keep things from moving around. I'll post again if I have any luck!
Woah!
Try this just to be sure:
When you move the right control to the right which of the rudder-vators move up or down?
Is it possible that they are connected reversed?
I'd expect the right one's trailing edge (as if you were sitting in the plane) to move UP and the left one's trailing edge to go down, or not move.
I don't have the plane, though, so I'm not sure...
I like the GWS slowstick! I've got three! I've built 6 for other people, including 3 flight students of mine.... All of them can fly it now!