Aren't decouplers supposed to block fuel flow?

[kitaro]

I have a build with an ordinary rocket engine, not a jet, where the engine is taking fuel from the wrong stage, through a decoupler. Has anyone else seen this?

[Claw]

If you have another part (besides a fuel tank) connected to the decoupler first, then it won't block fuel flow. Decouplers themselves actually don't block fuel flow except in the special circumstance where they are attached to fuel tanks.

Cheers,

-Claw

[Superfluous J]

If you have another part (besides a fuel tank) connected to the decoupler first, then it won't block fuel flow. Decouplers themselves actually don't block fuel flow except in the special circumstance where they are attached to fuel tanks.

Cheers,

-Claw

Wait, seriously?

No wonder nobody understands this game.

Also, you mean "fuel tanks and engines" right? Because 99% of the rockets I fly the decouplers are attached to an engine on one side. Frequently they're not attached to a fuel tank on the other. And I have never seen fuel drain through the decoupler.

[Padishar]

This only applies to radial decouplers. Kasuha's thread has all the info you need.

[Claw]

Just to be clear, this thread is mostly a necro. My most recent response was to answer this post here:

I have a build with an ordinary rocket engine, not a jet, where the engine is taking fuel from the wrong stage, through a decoupler. Has anyone else seen this?

So if you want to provide answers, this is the question you're looking for.

Cheers,

~Claw