Loiter can not forward straightly

ArduCopter Copter 3.4
1

Hi Developer

 I flied my copter with 3.4,everythings are perfect.

The drone can keep the position perfectly in loiter mode.
But when i forword(use pitch channel only) my copter with loiter,
the drone can not fly straightly in all the direction(It can only fly straightly in some direction).

I do the compass carlibration carefully, the offset value seems good.

can anyone give some suggestions?

thanks in advance.

2

It seems to me that you have simple or super simple mode enabled with loiter. Check your config.

3

I have this same problem with all our production Drones.
After good calibration and takeoff, drone flies skew to left.
After a few seconds it then starts to fly straight.

The problem is with a beginner getting our production drone, they just see it as a big problem.

4

Please post logs. It’s hard to give solution without logs.

5

I have a SD card now. So tomorrow I will record and post a log.

6

What Flight Controller are you using?

7

Hi
File attached.

Thanks

Gary

2020-03-31 12-28-10.bin (2.37 MB)

8

I am going to put the sd card in a second drone to show how the problem replicates.

Will send file later.

Thanks

G.

9

Here is a second flight in a different quad.
First forward flight still is skew, then it self corrects after a few turns.

G?

2020-03-31 13-16-34.bin (1.3 MB)

10

I see you have the same issue going in 2 threads 3.4 and 3.6 and you are using 3.5. I would suggest updating to current Stable (4.0.3 today) and go from there.