Change the physics to low it worked for me!

@DPSAircraftManufacturer You can help me with a plane, the problem is that it does not fly well, if you accept here I leave the link of my plane: https://www.simpleplanes.com/a/8ROO1s/moto

So I set all the parts at the tip at MassScale=1 @BogdanX But it still flexes like the gif above

I will try to find it @BogdanX

I did the tips of the wings are structural wings @Jetpackturtle

Weak wings? Try using structural wings modded to have control surfaces

@BogdanX

@Qingyuzhou @Dpsaircraftmanufacturer