Hi all, I have Stab & RTL reacting correctly and have started working on RTL with loss of control comms.

Using a DX7s and AR8000 I have succesfully setup failsafe on the rx using the trick to raise throttle, bind and then drop it back to 100% and I feel that is fine. The problem is that when i turn of the Tx the Failsafe activates and the Mission Planners show that the APM is in Circle mode, written in RED.

I have searched for the parameter THR_FS_ACTION to set it to 2 to indicate I want RTL on Throttle Failsafe but I cannot find it in the parameter list. I see all other options but cannot see it. I'm not going blind. I'm looking in the right place. Its just not there. I have seen it in other threads but didnt find an answer.

Running latest version MP updated only a few days ago. Also should add I am running on a fixed wing and have discovered that the THR_FS_ACTION is possibly only available for Arducopter? Not exactly sure on that.

Any assistance would be much appreciated, I am 'this' close to having it sorted.

- Scott

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  • Found this in the wiki....

    Turn off your transmitter. After 1.5 sec the flight mode should switch to Circle. After 20 sec the flight mode should switch to RTL. If you observe this behavior, your failsafe function has been set up correctly.

    Yet to be confirmed but positive.

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