Pumping water out of underwater base

[hackertom101]

So I'm having an issue pumping water out of my underwater base after its submerged. I currently have 18 large pumps to pump water out of my ballast tank. Its pumps out water pretty slow when I'm on the surface and after I get fairly deep it doesn't want to work at all. Do I need to pump air into the ballast tank while im pumping water out to speed up the process or something?

here is a link to my build https://steamcommunity.com/sharedfiles/filedetails/?id=1808448767

[Pille]

You need to use the big pumps as the small ones can only provide very little pressure.

Air pressure isn't modeled in the game. So there is either fluid or nothing (= "air").

[hackertom101]

Originally posted by Pille:

You need to use the big pumps as the small ones can only provide very little pressure.

Air pressure isn't modeled in the game. So there is either fluid or nothing (= "air").

i have 18 large pumps. now i did see frantic use a winch to provide air to a sub so I took that idea and made 4 more pumps that were tied to a winch that float to the surface, how ever that did'nt seem to work either

[ElfBossHogg]

For what purpose do you need to remove water from the base? If it's for an airlock for entering and exiting here's a little trick that works well irregardless of depth.

When you want to remove water from the airlock (in order to enter the base) don't dump it to the outside. Dump it in to a holding tank the exact size of your airlock that is internal to your structure. When you want to exit the base take the water from that same holding tank and use it to fill the airlock room resulting again in an empty holding tank.

What is the advantage of doing this... containers consider inside your structure are considered to be all at the same pressure. Therefore, irregardless of depth, you are pushing and pulling water from the airlock at a pressure the same as if you were at the surface. As soon as you add the outside as a "container" you inherit the pressure from that environment which will be higher at depth and you will need to push against it. I use the above in the airlock in my SCARAB Sub and it empties and fills relatively quickly irregardless of depth.

[ElfBossHogg]

Just reread... sounds like you want to evacuate water from your ballast tanks in order to rise. At depth there's not much choices. You could consider a support craft or floating a pod up with pumps in order to have them running with hoses from the surface to "suck" the ballasts. That way you aren't fighting against the pressure at depth since the exit point for the water will be under less pressure.

[hackertom101]

Originally posted by ElfBossHogg:

For what purpose do you need to remove water from the base? If it's for an airlock for entering and exiting here's a little trick that works well irregardless of depth.

When you want to remove water from the airlock (in order to enter the base) don't dump it to the outside. Dump it in to a holding tank the exact size of your airlock that is internal to your structure. When you want to exit the base take the water from that same holding tank and use it to fill the airlock room resulting again in an empty holding tank.

What is the advantage of doing this... containers consider inside your structure are considered to be all at the same pressure. Therefore, irregardless of depth, you are pushing and pulling water from the airlock at a pressure the same as if you were at the surface. As soon as you add the outside as a "container" you inherit the pressure from that environment which will be higher at depth and you will need to push against it. I use the above in the airlock in my SCARAB Sub and it empties and fills relatively quickly irregardless of depth.

That's a great idea thank you.

[hackertom101]

Originally posted by ElfBossHogg:

Just reread... sounds like you want to evacuate water from your ballast tanks in order to rise. At depth there's not much choices. You could consider a support craft or floating a pod up with pumps in order to have them running with hoses from the surface to "suck" the ballasts. That way you aren't fighting against the pressure at depth since the exit point for the water will be under less pressure.

I have a float that goes to the surface how ever that does not seem to work. I will try to put my pumps top side to see if that works.

[Dora the destroyer]

Originally posted by hackertom101:

Originally posted by ElfBossHogg:

Just reread... sounds like you want to evacuate water from your ballast tanks in order to rise. At depth there's not much choices. You could consider a support craft or floating a pod up with pumps in order to have them running with hoses from the surface to "suck" the ballasts. That way you aren't fighting against the pressure at depth since the exit point for the water will be under less pressure.

I have a float that goes to the surface how ever that does not seem to work. I will try to put my pumps top side to see if that works.

did it?