I have a GP Ultimate. It is fast becoming my fav plane but it has a few traits that I would like to figure out.
Firstly It does not do positive snaps very well. While doing one It kinda looks like it is not full stalled and is doing some kind of wierd roll with aileron and rudder. However it does wicked negative snaps. Its cool to hear the gasps from people watching when I do these. It will even do an inverted flat spin power off with just rudder and elevator input.
Why the difference between positive and negative? I have a bit more throw than the max throw suggested in the manual. I also have about 5% more up elevator than down. The CG is set so that I need almost no down elevator when inverted.
Also it has bad yaw / pitch coupling. In knife edge it wants to continue rolling into the turn and badly tuck to the belly.
Also it does not stall turn good, I believe due to the coupling.
Any suggestions? Does others do this? Should I mix the knife edge problem out?