Why does the piston head lose rigidity when combined with the rotor?

[Demon83ad]

https://ibb.co/ph8cJ6d
https://ibb.co/WVZZHz4

[Gorbadon]

I could be wrong here but it looks like the extra height the grid is lifted up puts more weight and strain from the greater angle on the piston, that and the rotor being an additional flexpoint is probably not helping the rigidity as well.

For a more direct comparison reduce the max. extention of the piston by 2.5m so you end up lifting the grid to the same height, will still have more flex than without the rotor though.

Share inerta tensor may make it less severe (only available in experimental mode if I remember right).

Edit:
Thinking of it, I remember there was a strange bug where hinges would loose a lot of their strength if they where build on top of each other.
With a block in between the two hinges stength went back to normal.

Maybe you found something similar, a block between the piston and the rotor could work better.

[Mojo]

Trying to figure out why you have a rotor just for a square mag plate? If you need the extra length just slap a normal block on the end of the piston.

[Doom]

Yes.

Stuff like this is implemented through physical engine constraints. And constraints work best when there are comparable masses on both sides of the constraint. Meaning if you have a huge 100T truck and connect it with a hinge to a thin and long arm, the hinge is gonna wobble.

When you connect piston to a rotor and attach rotor to your truck you create three rigid bodies. The truck body with a huge mass, rotor head with piston body that has smaller mass, and piston head with even smaller mass.

It is absolutely going to wobble and lose rigidity.

Basically the only shape in space engineers that is not going to wobble is a vehicle without any subgrids, meaning pistons and rotors (animated doors do not ocunt). Because that's a single rigidbody. When you start attaching pistons rotors, etc, all those parts will be not quite rigid. Under stress they might start oscillating, and that's where "Clang" comes from...

[ShadedMJ]

Originally posted by Demon83ad:

...links...

You or Steam put steamcommunity in the links. They don't open normally.

I think your criteria is messed up. What's your definition of rigidity? This could just be a graphic affect since the plate has to be level to the ground, but the rover is at a tilt. If you decreased the piston maximum by 2.6m (2.5m for rotor and 0.1m for rotor head) it would look better.

[Storm]

I've been experimenting with chains of these off my ships / bases - ..conveyor base - rotor - hinge - piston - rotor - hing - piston rotor - tool / connector. I have had up to 4 so far and it's working far better than I expected.

I'm having a lot of success by putting tensors on the hinges and rotors and NOT the pistons.

You tell me why but it's working.

Using the piston as a lever is next.

[Demon83ad]

Thanks to all!
I'm reporting...
The block between the rotor and the piston is not working.
Changing the length - did not work and does not work.
Inertia tensor - completely corrects the situation, but makes the piston extension extremely dangerous, but it's better than an oblique piston =)

[Dan2D3D]

Hi, I know a lot use landing gear on piston but I can tell it's not a good setup, well the working stable solutions are very limited and I prefer to avoid ;)

Still cool to try at finding the stable solutions and I can see some found working solution just by looking at the Workshop, but gave me more problems than joy like thrusters not turning Off auto when landing gear locked...

[Demon83ad]

Originally posted by Dan2D3D:

...but gave me more problems than joy like thrusters not turning Off auto when landing gear locked...

Use the timer, with it you can turn off, dock, do everything with one button.

[Dan2D3D]

That I know how to with timer block, like this ship with "legs" that can fold/unfold using rotor on hinge with one Time to do the job in one click but it's not going well with landing gears on the subgrid.

For example -> No landing gears on the folding legs :
https://steamcommunity.com/sharedfiles/filedetails/?id=2537440100

[ZombieHunter]

Originally posted by Dan2D3D:

Hi, I know a lot use landing gear on piston but I can tell it's not a good setup, well the working stable solutions are very limited and I prefer to avoid ;)

Still cool to try at finding the stable solutions and I can see some found working solution just by looking at the Workshop, but gave me more problems than joy like thrusters not turning Off auto when landing gear locked...

I've tried this to create retractable gear and I've not been able to make it stable. It inevitably starts to freak out and things go south fast. The new hinges are a better way to go and have the gear rotate up and lay flat (as they do in real aircraft). If space is a premium you can put a rotor between the hinge and the gear to rotate the gear 90 degrees as it the hinge moves up (for something like the nose gear). If you use the rotor be careful when landing b/c the nose gear will be less sturdy.