What was said above is quite, right, but it is mostly just the flip 3d.

I'm quite baffled by how with upthrust it flies level, but still climbs inverrted??!?! even with a very nose heavy OR a very tail heavy CG ... still does the same thing!! And in slow flight it seems to sit tail down regardless of the cg?



my observations above were of a friends flip, no matter what he did (thrustline / CG ) it still handled inthe same way.. basically kick ass at 3d, but 'untidy' at pattern stuff.

Apparently taking the tips off it helps... YNOT is the one to ask. alternatively, alter the shape of the tips, personally, i think this is the problem/

Good luck.