I’ve swapped the standard DJI motors + plastic blades back to the T-Motor + Carbon fiber blades; sure enough, no rocketting up into the sky, and once more I was able to complete a flight. But…
all the old problems I had returned – excessive drift and yaw.
- the DJI motors are not powerful enough to manage the angular momentum of their heavier plastic blades
- the T-motors are not all equal – from the direction of the drift, I would guess the right-hand pair are damaged leading to drift and yaw.
So I have no choice but to buy new motors T-motors, and see what happens. Hopefully that will sort things out and I can get back to real testing of my control software PIDs rather than diagnosing bizarre behaviour due to dodgy hardware.
So frustrating wasting my very limited testing time on something that turns out to be not my fault!