Hello guys. I have a problem. I have a t-rex 600 helicopter and a pixhawk px4 helicopter. When I change flight mode from stabilize to althold then the swashplate goes down to -3 degrees just like I have set the bottom range of the swashplate movement. The same happens in the loiter mode. Does anyone know what it is caused by? Can you help me?

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Hi Marcin,

Did you get help feom anybody ? I have the same problem. When switching from stabilize to alt hold, the collective pitch decreases by 3-5 degrees.

I searched all the parameters in Mission Planner, but can't find a relevant parameter. My set up is Align 450 flybar, Pixhack, Copter V3.5.7.

I have another set up Align 450 FBL, APM 2.6, Copter  3.2.1. With this setup, the collective pitch does not change when I switch from stabilize to Alt hold. Cannot upgrade to Copter 3.5 becasue Copter 3.2 is the last version which supports APM2.6.

Let me know if you have clue to solve this problem.

Thanks

Frankie

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