Yeah I've run into the same thing as you with somelousy instructions... or mis translated ones.

I don't blame NP for this as I've seen the same from most Chinese and some Korean suppliers. NP often manually corrects the documentation. I've received many planes from them where the C.G. was hand marked by someone.... but I'd imagine that some will escape inspection.

I ALMOST flew a plane with the C.G. so bad it would have self destructed. Fortunately the day before I was combing the forums and noticed that someone stated that the C.G. was off in the provided manuals.

I fixed mine thanks to this.


A good rule of thumb is to check to see where the C.G. lies in the wing root chord.

If should (usually) be at or forward of the thickest part of the wing in a straight wing plane and in the same position at the average center of the wing when there is a sweep. While this is only a rough rule of thumb useless for actual C.G. positions, it permits you to visually spot a misquoted C.G. in a set of directions. After a while you do get a "feel" for it though.

I'm still curious as to how the CMP was for you forgetting the C.G. issues.