[latomgo]

Hi,
i bought the Assault Reaper, an fully pitch controlled 3D copter from HobbyKing. But because the original controller does not have an level-mode (Attitute), I installed and configured the CC3D. Everything fine, it flies great so far.

BUT: when I try inverted flight, the copter drifts and turnes uncontrollable.

The reason: The copter has yust one motor, yaw is done by increasing or decreasing pitch. In normal flight this is ok. In inverted flight (pitch is negative), the servo travel must be reversed. But yaw input moves the pitch servo in the same direction, independend of normal or inverted flight. Insead increasing pitch it decreases pitch in inverted flight.

I didn't find any way to configure the mixer settings. Any ideas?

[TheOtherCliff]

I am guessing that this must be set up as if it were a regular collective pitch heli.  There are guys here that have done that successfully.  Search the forums for "collective" maybe.

[latomgo]

This is different from an collective heli setup: heli does yaw with the tail rotor.

I try to explain:

Mixer	collective	yaw	roll	nick
Rotor 1	+90	+30	+30	-30
Rotor 2	+90	-30	-30	-30
Rotor 3	+90	+30	-30	+30
Rotor 4	+90	-30	+30	+30

Ok for collective > 50 (positive)

for collective < 50 (negative) we need:

Mixer	collective	yaw	roll	nick
Rotor 1	+90	-30	+30	-30
Rotor 2	+90	+30	-30	-30
Rotor 3	+90	-30	-30	+30
Rotor 4	+90	+30	+30	+30

That means, the sign of the yaw mixer values must be controlled by another input (collective positive or negative).

I guess this problem is too special and there is no way to solve it. I will install the original controller again and try to fly without level mode.