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Arduplane 3.4, Vtail.

Posted by Navigant on September 26, 2015 at 7:34am

Hello.

I have set up an Anaconda platform with PX4 running latest arduplane 3.4.0 and everything looks to be working just fine except one annoying thing:

When in Stabilize, all surfaces works and response correctly except one Vtail surface which barely moves.
when in manual mode all surfaces moves as requested.

Ch1- Thro

Ch2- Aile1

Ch3- Rudd

Ch4- ELE

Ch5-Aile2

VTAIL_OUTPUT = 0, as i mix in my radio.

I have fiddled with every possible parameter value, PID's, reverses, trims, you name it - nothing fixes this odd behavior.  looking at MP status screen i see that Ch3out  (Half of my Vtail) value (when in Stabilize mode) is not changing when i'm pitching the model up/down during preflight checks.

What am I missing here?

Thanks,

Navi.

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Replies

  • Andre K. September 26, 2015 at 12:14pm
    You are using the old, deprecated way of mixing in radio, whereAP must decode it first, and any setup mistake in min/max/trim gives results like this
    • Navigant > Andre K. September 27, 2015 at 2:51am

      Thank you Andre.

      Following your advice i have disabled Vtail mixing in my radio, and enabled in AP.

      All seems to be working fine now, still some more tests are called for.
      I was flying with APM2+ for many years and can't recall such issues up until i switched to PX4.

      have a nice week and happy landings.

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