Hi,Ive been tuning my ardupilot 2.7.1 and imuv2 in for a few weeks now and the following work great:Manual mode,Stabilise,Fly by wire ARTLHavent tried auto yet.PID tuning has been good and fly by wire A flies like it on rails.Today ive tried FLY BY WIRE B but I get no elevator control. Pushing nose down slows the motor, puliing back speeds it up.Has anyone experienced this? The throttle control jumpers seem to be wired up correctly as it works in both fly by wire B and RTL (in that the throttle varies etc as ardupilot commands it) but elevator becomes a secondary, less effective throttle control in FLY BY WIRE B.Any guidance appreciated, things have gone fantastically to date!

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  • Thanks a lot Jason,

    Its a tricky problem, my easy star noses right down on throttle up and takes a long time (and height!) to recover. I dont know if the ability to hold a little up elevator when throttling up/or when throttle is above x percent is feasible (not to gain high merely hold level flight) or if that throws the maths out of the window!

    Anyway, appreciate your Continued effort on the "legacy" AP!

    Will be testing your latest build this week weather permitting.
  • Developer
    There is no elevator control in FBW B. Sorry, It's just for simulation of the autopilot. You are giving it altitude error commands which will cause the plane to loose altitude by slowing the motor. The slow speed will trigger the elevator and make the plane come down. If your throttle min is too high, you won't be able to come down very quickly or at all.
  • Thanks ritchie,

    Yes i do, fbw b is the problem though!

    Appreciate your input.

    D
  • Can you confirm whether you have an airspeed sensor?
    FBW_A needs one so if you don't have it something will be up.
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