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Quadcopter becomes unstable at scales of <=40%

Posted: 14 May 2018, 07:55
by Rex
Hi, I've tried scaling the default quadcopter down and noticed that it becomes unstable at <=40% (i.e exploding).

May I know is this due to a threshold on the minimum size required of the components, or is it caused by something else?

Thanks in advance!

Re: Quadcopter becomes unstable at scales of <=40%

Posted: 15 May 2018, 08:30
by coppelia
Hello,

you will have to adjust the quadcopter controller code if you scale the quadcopter.

Cheers

Re: Quadcopter becomes unstable at scales of <=40%

Posted: 15 May 2018, 11:04
by Rex
Hi Coppella, thanks for the advice.

In general, is there a minimum size each dynamic shape should have if I were to scale models down to really small sizes? I.E 2% of original size, assuming the parameters of the models' child script have been retuned for the new scale

Thanks!

Re: Quadcopter becomes unstable at scales of <=40%

Posted: 18 May 2018, 13:50
by coppelia
This depends a lot on the physics engine you use, and its settings/parameters. For instance, with Bullet, you have a parameter internal scaling that can be adjusted in order to overcome some of the limitations.

Cheers