What causes ships to start 'dancing' on the VAB

[drtedastro]

I have noticed that various ship designs may or may not start the VAB wiggle dance at different times. When the ship has gantry points hold it and there is nothing 'special' with the design, it will just start the wiggle here and wiggle there routine.

Any traceable and repeatable reason for this???

I understand it if the design has something that looks like a tree sitting on top, but just for normal, good CoG and CoM, this makes no sense to me...

thanks.

[captainreynolds]

Could you post a picture of one of your ships that you see this happen with?

[Clouds]

Any traceable and repeatable reason for this???

We won't know until we see the ship.

Builds at risk of "dancing" for me are either ones where landing struts' feet are intersecting other parts (since those still collide even when they're all part of the same vessel), or where some lightweight part is supporting a lot of weight with few-to-no struts to help bear the weight - it won't outright break or collapse, but will sag a little and then start shaking like a dog trying to dry its fur, until it goes to pieces.

[Scorpi15]

The parts may be clipping into each other, causing physics to bug out and the ship to go crazy.