Unstable with boat in loiter mode

Hi,there

I am running a test with a kayak which have two motors.

when turn into loiter mode the kayak seems unstable wheather in static lake or stream in river.But it’s absolutly stable when I move the system(includes motros and pixhawk and every thing except the kayak) to a small boat.

what’s the problem?

BTW.the lenght between two motors is almost the same for the kayak and small boat.

great thanks for your help @rmackay9

https://kayake.club/logs/2025-01-05%2015-30-30.bin

Hi @ferrisfit,

I think it’s just down to tuning the steering controller which is described in our tuning section of the wiki.

I also recommend upgrading from 4.2 to a more recent version. E.g. 4.5 (the stable release) or 4.6 which has entered beta testing.