Discussions

I have a problem at the moment with 2.70 on an AMP 2.5.  When I select RTL in flight the throttle cuts.  The aircraft was OK as it glided back to the Home position OK however all testing I have done does not allow the throttle to come on.

However I am testing on the ground now.  It finally occurred to me (this is my first APM) that the throttle maybe should not enable on the ground as some failsafes may have been coded to stop this happening.

This is my most important question - am I testing the behaviour correctly?  It now occurs to me that perhaps the plane was above the correct altitude and the motor went to the minimum to lose altitude and would have come on at the correct set altitude.  However I really need to know if the throttle should come on on the ground.

So can someone who is familiar with this are please advise me the conditions that have to be met for the throttle to be enabled up to the cruise throttle setting?  I have checked this setting and it is now 50%.  I have both written and read back this value.  My RTL altitude is also correct at 75M.  

I am persisting with this because it could be a software bug rather than problem with my setup.  The APM flies well in stabilise mode with good return to level flight after pitch and roll disturbances.  It tested this in my first test flight.  After reviewing the logs my second flight was to test AUTO and RTL when I discovered the problem.

One thing that may be a part of the problem.  I enabled the APM failsafe and set up the short and long behaviours however now my APM on bootup goes into a short failsafe (even though the TX is on) and then starts up in RTL mode.  I have to click on stabilise then manual to get it to manual with the TX switch.