Neither decouplers nor docking ports block fuel flow inside cargo bay

[RocketBlam]

I have a spaceplane with a cargo bay. The cargo bay contains a fuel tank attached to a decoupler and a docking port (it goes 1. Decoupler, 2. Docking Port, 3. Command Module, 4. Fuel Tank). First, the decoupler is supposed to block fuel flow from the fuel tank in the cargo bay, but it doesn't. Second, turning off "enable crossfeed" on the docking port has no effect either. There is no way to stop fuel from being drained out of the tank in the cargo bay.

[Claw]

Jet engines like to suck fuel from every available location, even if you turn off crossfeed in places. About the only way to stop it is to turn the green arrow into a red "no" circle. Otherwise you have to run fuel lines around so that other (non-jet) engines can get to it. For cargo, you basically have to disable fuel (via the right-click tweakables) or transfer fuel back into the tank when it's time to release.

It's one of the many ways jet engines "help" control CoM now, despite the fact that it's actually quite frustrating and steals fuel from rocket engines.

Sorry :/

Cheers,

~Claw

[SAI Peregrinus]

http://forum.kerbalspaceprogram.com/threads/118176

Set the cargo tank to pump itself to full.

[RocketBlam]

Jet engines like to suck fuel from every available location, even if you turn off crossfeed in places. About the only way to stop it is to turn the green arrow into a red "no" circle. Otherwise you have to run fuel lines around so that other (non-jet) engines can get to it. For cargo, you basically have to disable fuel (via the right-click tweakables) or transfer fuel back into the tank when it's time to release.

It's one of the many ways jet engines "help" control CoM now, despite the fact that it's actually quite frustrating and steals fuel from rocket engines.

Sorry :/

Cheers,

~Claw

It draws fuel from them under rocket power too. The thing is empty of both liquid fuel and oxidant when I reach orbit.

[Capt. Hunt]

If I have a tank on a payload, I usually do as claw says and either top it off from the onboard tanks or uncheck the tank in the right click menu to prevent it from draining. From a safety standpoint, leaving it unfueled until deployment is probably the best option, ofcourse when have we known Kerbals to do anything safely.

[sal_vager]

Disabling fuel flow does actually work, so please upload your craft, I'll see if I can fix it.

[RocketBlam]

OK, try this:

https://drive.google.com/file/d/0B1Q3CkBZDIsFVkh0ZDd6V1BOWmc/view?usp=sharing

[sal_vager]

A craft so big it needs a zip file, okay I'll try it out.

Edit:

Okay, it won't drain the cargo tank now, enjoy.

Edited June 3, 2015 by sal_vager

[RocketBlam]

A craft so big it needs a zip file, okay I'll try it out.

Edit:

Okay, it won't drain the cargo tank now, enjoy.

OK, so what do I do next time?

NVM, I see what you did.

This post was really more in the way of a bug report. I could just fill the tank up when I reached orbit (which is what I ended up doing). I am just letting Squad know that it's bugged.

Edited June 4, 2015 by RocketBlam

[sal_vager]

Okay, best thing is to put it on the tracker though, that's where they work from rather than trying to find bugs here, Support is more for support

[RocketBlam]

Okay, best thing is to put it on the tracker though, that's where they work from rather than trying to find bugs here, Support is more for support

Sorry, I looked for that and I couldn't find it.

[sal_vager]

Yeah Claw needs to make the link bigger, here's the tracker.

Please read this before posting a bug though