Quadcopter pitches backwards and stops when releasing stick instead of drifting forward

@f4ichuck wrote:

Hi,

I've searched for somebody having similar behavior and suggestions without much luck. I'm running:
Ardupilot Flight Controller 2.6 with Arducopter 3.2
Symmetrical X layout quad with COG centered

When in Stabilize or Alt Hold mode and in a forward flight, releasing the stick will cause the quadcopter to pitch backwards and come to an abrupt stop. I've tried turning down the Pitch Stabilize and P gain without luck.

I have a TBS clone with the Ardupilot 2.8 FC that does not exhibit this behavior. When I release the stick, it keeps drifting forward with it's momentum.

Any ideas on what to try?

Thanks,
-Chuck

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