Arduplane loiter and RTL not working,

Hi guys, I have a question about my arduplane setup, Im running a hobbyking EPP FPV chassis, and it works really well in manual and stabilised mode, but I am having some trouble with loiter and RTL modes. Basically, whenever I engage them, the plane locks onto its current direction of travel, throttles up, and tries to disappear.

I've calibrated the compass, Im running the latest version of arduplane, the plane is trimmed out. the GPS has a solid lock, stability works perfectly, I just cant get the RTL and loiter modes working.

I've attached my last flight log, if anyone could have a look, I would greatly appreciate it.

2013-07-12 14-08-32.tlog

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  • Developer

    Hi Jerry,

    It's not just loiter and RTL, you're log shows all your modes are working badly. Basically you haven't tuned the roll and pitch gains at all, and the defaults are far too small for your aircraft. It wants to roll over at 45 degrees in RTL, but the gain you have in RLL2SRV_P is too small to overcome the natural stability of the aircraft, so it ends up staying fairly flat.

    I'd suggest you start using FBWA mode for tuning, and have a read of the tuning guide.

    Here is a graph of the demanded roll versus achieved roll during one of your RTL tries:

    3692770450?profile=originalit shows your RLL2SRV_P is far too low, probably by a factor of 2 or so. Read the tuning guide and then see how you go with FBWA tuning.

    Cheers, Tridge

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