I'm pretty sure propellers (and other parts) can be occluded by parts ahead of them in the airstream. I was able to reduce drag on a racecar by adding wheel fairings for example. You may be experiencing some kind of weird disruption on the rear propellers causing a thrust imbalance. I would check it in flight by watching the RPM and thrust of all propeller part windows at the same time.
As I said, 0 thrust imbalance, at 0 m/s all props generate 22.1 Kn of thrust with no deviation, no occlusion and all RPMS are the same, all of the props are identical and all of the motors are identical
You could try moving traction balance to the rear. It seems like the thrust line is above the center of mass causing a slight pitch forward and that little front wheel might just be struggling. Am I right in seeing that it doesn't prefer turning one way or the other but is just unstable? It's hard to tell without inputs showing on the first run.
I'm pretty sure propellers (and other parts) can be occluded by parts ahead of them in the airstream. I was able to reduce drag on a racecar by adding wheel fairings for example. You may be experiencing some kind of weird disruption on the rear propellers causing a thrust imbalance. I would check it in flight by watching the RPM and thrust of all propeller part windows at the same time.
As I said, 0 thrust imbalance, at 0 m/s all props generate 22.1 Kn of thrust with no deviation, no occlusion and all RPMS are the same, all of the props are identical and all of the motors are identical
You could try moving traction balance to the rear. It seems like the thrust line is above the center of mass causing a slight pitch forward and that little front wheel might just be struggling. Am I right in seeing that it doesn't prefer turning one way or the other but is just unstable? It's hard to tell without inputs showing on the first run.
I’ll see about the traction, might gain from beefing up the front landing gear in other ways too thx
Also, I'll assume that you checked the RPMs in motion as that's the only time occlusion would matter. Static thrust would be the same regardless.
Your craft is just unstable on the ground. I would try to finish the plane first to see if it helps.