RE: Bob Cat Copy Falcon 120 Jet
Ref possitive nose up angle on the ground. My fisrt attempts with my engine dialed down to around 13 lbs of thrust just led to the plane running along the ground at high speed. I have possitive nose up when she sits on the ground and rotation is excellent without any fus and no flaps, off really rough grass and engine cranked up to 14 lbs.
If you have too much nose up, no probs with take off, but after landing the plane can suddenley point skywards and nose dive in the ground. I ripped off my nose leg due to this, twice, hence the reason for my home made nose leg phenmatic extension system, which reduces length of nose leg when full flap selected, keeps the plane planted during the roll out. If you have tarmac runway, might not have too many issues with low possitive nose angle for take off, but i would definately have some, cheers tim