Question submarine.. wip

[Delle(DK)]

Hello
I am building a submarine and have a question.

I am have been fooling arround with various setups of my sub, and tried big balast tanks and small ones, and even diveded one tank into 3 to try and make my submarine float level in the water once i have dived.
At the surface i can easy make it level ( though right now its a bit nose down )
Anyway but once i dive and get below example 5 meters then the physics change and now my submarine look like its tail heavy..
However its NOT tail heavy, the problem is there are so much air inside the front of my submarine that the front goes up, and the rear goes down, and then the rear of my submarine sink in a 45 degree angle backward. When landed on the sea bed it stand like that where the front will not come down.

I am aware that I can install trusters and force it, however since this is work in progress im not that far yet, and also i really prefer my submarine to be stable and level before i add anything.

What should i do for better stability, maybe i should use the Gyro ?
should i devide my big tank into two and somehow make some auto matics so i can pump water from one tank to the other to shift the weight ?
OR should i maybe consider a mechanical sliding system with weight that move forward or back and change the center of mass ?

here is my sub, thank you for advice
( the stupid loooking thing in the nose is a tool to do the oil field missionwhere i have to dive down and install something on an oil well. )
Sub was tested to go down to about 96meter and come up again.. however its a bit slow due to the presure.. as said working on it. ;-)

https://steamcommunity.com/sharedfiles/filedetails/?id=1727314502

[kuba]

You can reduce the size of the ballast tank.
(By making wall between middle of the tank and rear of submarine)
Witch move center of mass when ballast tank is fill.

[Delle(DK)]

Thank you ;-)

[THX-11-38]

Same happens to my submarine.
When CM is at about 10 meters depth, it seems that physics model gets re-calculated, and my sub starts rotating forward until it gets like 50 degrees bow down. After several minutes, it gets back to zero-position and same way stern goes down same 50 deg. I've tested it so many times, I can say now, that ballast tanks are well-balanced since tested on surface- and low-depths with tilt meters. No tuning or operating tanks during those spins were done, it happens itself.
Will wait for new underwater-physics system.

[Delle(DK)]

well im glad to hear im not the only one having problems with the underwater physics ( one of my friends have same problem ). I have tried to report it as a bug on the official bug forum.

[[HM] Deviousdyer]

Yo! don't know if the issue has been raised fully yet but the problem is the buoyancy physics,
press F2 three times and you will see white boxes, some are blue which represents they're partially submerged. The deeper you go the boxes get bigger and the resolution becomes worse causing your submarine to pitch and roll unreasonably. I fixed it on my design by adding active stabilisation by moving weights, this is easier to implement than pumps moving fluid between custom tanks.

If you've got more questions this is where I first posted and somebody told me what I'm telling you XD.

https://steamcommunity.com/app/573090/discussions/0/2605804632879515215/

You can find my design in this discussion if you've any queries about the active stabilisation too, however its since been updated and is working much better now.

[Delle(DK)]

Cool thank you.. I actual thought about the moving weight system but dident try that solution yet :)

[Broseidon]

You could add trim ballast, tanks at the front and rear that you flood/drain to keep yourself level. It worked decently for me.

[v_corp]

Hi All, my first post after playing stormworks for a bit with a friend.
https://steamcommunity.com/sharedfiles/filedetails/?id=1816450990
This bastard! I turned a helipad boat into a sub to learn the ballast on normal mode, not advanced and I've read the above about active stabilisation and moving weights, however before I get started on that, I just wanted to know why nothing I do affects how nose heavy my sub is.

I've changed the amount of ballast, i've added crazy amounts of weights, but once I get below 5mtrs, always nose heavy. I would follow the advice given here about moving weights and trim balance but not before I understand why no change I have made affects how my sub gets to nearly 80deg nose to ground after tanks fill.

just a note, the uploaded sub Doomseed is what I had when the problem first happened, not with any of the fixes I tried.

[v_corp]

Update: https://steamcommunity.com/sharedfiles/filedetails/?id=1816608578
made a weight active stab and also a PID depth controller but I can't get the PID ratio right, and again the moment it dips below 5mtrs it just nose dives to the ocean floor..

[Beginner]

It should be fixed now in v0.9.8

[Delle(DK)]

looking forward trying it ;-)