VTOL Altitude Fluctuations Between Waypoints in AUTO Mode – PID Tuning Issue?

ArduPlane Plane 4.5
1

Hi everyone,

I’ve been testing a VTOL in a simulator and noticed that when flying in AUTO mode, the altitude tends to fluctuate between waypoints—it increases and decreases unexpectedly.

I’m wondering if this issue could be related to incorrect PID values. Does anyone have experience with a similar issue or advice on how to resolve this?

LOG

Thanks in advance for your help!

2

I think it’s an issue with the airspeed settings.

AIRSPEED_CRUISE  23.000000
AIRSPEED_MAX     22.000000
AIRSPEED_MIN     12.000000

Try lowering the AIRSPEED_CRUISE speed to 20 or 19 and see what that does.

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