Bunny Hopping Plane

[dunc_vern]

Hi all looking for some advice on how to stop my plane from nosing up and down continuously in flight. As soon as I set the altitude hold the plane goes into a nose up and nose down cycle (bit like the vomit comet) I think it may be something to do with the PID Setting and C of G? Any advice gratefully accepted.

[Unit 744]

I can't help you with PIDs. I despise them because they are too unintuitive. I use LUA scripts instead to create autopilots.

The reason it is cycling like that is because the autopilot is overreacting. I imagine you probably need to lower some PID settings, but I have no idea which or by how much.

[Ra-Ra-Rasputin]

PIDs are only good for their fast and mostly universal usage, but they'll never outdo purpose built electronics :)

To figure this one out, you'd have to link the plane. Usually people do the mistake of tying gyro of some sort to the plane, which just won't work as it's a helo gyro.

[dunc_vern]

Thanks and yes it does go through the gyro. So i guess if I bypass the gyro and go straight through the PID that may solve the problem or is that a too simplistic idea?
LUA Scripting may be the way to go not too bothered about an all singing and all dancing autopilot but altitude hold is useful for long flights and I have a separate speed hold by auto feathering the props.

[Ra-Ra-Rasputin]

Yes, don't push it through the gyro even with auto-hover off. It's not meant to be an airplane gyro so it really won't work as one :)

[dunc_vern]

So i have now rerouted through the PID and bypassed the gyro. I have stopped bouncing and now either go straight up into a stall if I am below the selected altitude or flip over and drop if below the selected altitude, this is what I love about this game half the fun is solving the physics and control problems. :o)