TKOFF mode vs Mission Takeoff regarding altitude

ArduPlane Plane 4.1
1

Using mission takeoff my plane starts fine, reaches required altitude with no problems.
Using Tkoff mode it goes up to 20m and then levels.

Any ideas?

Newest 4.1 stable.

2

Try checking TKOFF_ALT in your parameters. When using mission takeoff it will use the target altitude as you set in the planning tab, when using TKOFF mode it will use the TKOFF_ parameters instead.

3

I think I got it sorted.
I had tkoff lvl altitude set to 20m so for the first 20m it would climb nicely but then it would level and start circling and climbing over the tkoff distance.
I set it to 30m now so for the first 30m it climbs straight up, then levels a bit and starts climbing in a circle until it reaches the tkoff altitude.