When planning a mission and setting the speed between waypoints, I'd like enable the Pixhawk to automatically set max speed so as to maintain altitude. (Well heck, also when I am NOT flying a mission.)

In other words, if I call for 15m/s and the hex can not maintain altitude at that speed, the Pixhawk will automatically dial back the speed to 14 or 13 (or whatever) so as to maintain altitude.

Is there a parameter that says "limit speed to maintain altitude"?

I'd think this would be particularly useful toward the end of a long flight when voltage may be dropping...I'd really like Pixhawk to automatically sacrifice speed for altitude so as to not descend into terrain.

Thanks...

--

Bill

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Replies

  • what version AC are you using ?

    That has been fixed long time ago, if not, try to set WPNAV to something crazy, like 30m/s , and switch to auto, if it fails to maintain altitude, - switch to stabilize, land, and post log.

    • Andre, it's 3.3.2....

      So you are saying that maintaining altitude is prioritized by default over maintaining speed (that does make perfect sense).  

      Hmmm....I actually haven't flown a mission in a while, but I swear I was losing significatnt altitude if I set the WPNAV SPEED too high.

      Would it matter if my max bank angle was set too high?

      Thanks...

      • it should not,. matter, after all, that's a part of achieving high speed, and that's what needs to be limited as altitude error increases.

        I have seen altitude drop at high speeds (in alt.hold) that were caused the low pressure/vacuum beneath the canopy.   But it was only some meters, then stabilized there until breaking/stop.

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