[Breaking Grounds] Ferris Wheel keeps exploding

[4x4cheesecake]

Hi there

I'm trying to build a Ferris Wheel for my Kerbals to have some fun but my first prototype keeps exploding furiously after a bit more than half of a rotation.

There are two heavy rotors, one of them is actually motorized, the second one is just used as a bearing. It kinda looks like the structure builds up some torque but both rotors are actually spinning so this should be fine, shouldn't it?

The first explosion in the log shows:

Quote

[F: 991609]: rotor.03 collided into Tube2 - relative velocity: 155.2965 - momentum: 62.1

I already tried to attach the bearing with the other side but there is no difference. Here is a short video clip showing the issue (the dumpling tank starts at the very top and is just there to track the rotation progress):

(Explosion at ~0:50)

And here is the craft file (stock parts incl. MH and BG DLC parts): https://www.dropbox.com/s/alpwsem97e1p0j7/Ferris Wheel.craft?dl=0

Any ideas why this happens and how to prevent it? I actually thought the ferris wheel will be the easiest thing to build for my amusement park

edit: Apparently, it works perfectly fine in a smaller test (and indeed, it doesn't matter which side of the bearing is connected to the axis):

Spoiler

Probably, I just have to rigidify the whole ferris wheel a bit....

Edited May 31, 2019 by 4x4cheesecake

[4x4cheesecake]

After a few more tests with slightly different designs, I noticed that the issue seem to be caused by the panels on the ground breaking apart:

Quote

[F: 1471279]: [structuralPanel2] Collision Enhancer Punch Through - vel: 5.974602

Since the panels are connected to the support structure which holds the bearing, the bearing spazzed out and caused the explosion.

I rebuild parts of the wheel in a different order and replaced the root part. Previously, the root part was one of the panels on the grounds, now it is a small probe core inside of the wheel axis and the wheel itself is build in mirror symmetry (btw. symmetry on hinges is a bit wonky ). This allowed me to remove the ground panels at all and now the wheel spins properly without any  explosions  

Well, without the panels, the whole structure became a bit wobbly and I have to fix that now but at least, no more explosions