It's an old thread, hopefully some of the GP Ultimate 65" owners are still reading it.
A few years ago I bought one second hand. Looks good. But I have never flown it yet.
Time to prepare this gorgeous plane.
It has a Zenoah ZG45 with Krumscheid 3086-5 exhaust.
1) As I have not build this plane myself, I wonder if it's best to separate the winghalves and reinforce the wingjoiners.
I don't know if this has been done by the first owner/builder. I think this plane was sold as an ARF kit
If it's not necessary I rather not. The wings are still very nice looking.
I don't fly aggressive 3D, but I do like flying loops, rolls and spinns.
2) I like to fly my planes 'neutral' on CoG with very little or no down elevator needed to fly inverted.
As most suppliers recommend a noise heavy CoG, I wonder what CoG is best for me to start with.
Is the GP recommended CoG of 6.5" (165mm) 'neutral' or still nose heavy?
Although the Zenoah is a heavy engine, the plane with engine, exhaust and servo's (without batteries, RX and powerbox) is still tail heavy when balancing on 6.5"
Any info is welcome.