Something I did not know...

[Brotoro]

I made the device shown below to test something about fuel flow. It has a probe body and air intake on the front, a fuel tank in the middle, and a jet engine on the back, all separated by 2x2 structural plates. The 2x2 plates are NOT fuel cross-feed capable, so if there is no fuel line the jet engine won't work (as expected). But when I run a fuel line from the fuel tank to the corner of the plate, the plate can carry fuel to rest of the way to the engine and it works.

I did not know things worked this way.

[GusTurbo]

That is weird. I didn't think that was supposed to work.

[CoriW]

Well, that shouldn't work... Huh... But it does.

[Uocjat]

clearly what is happening here is that the fuel line being connected to a non-storage part has nowhere to pump the fuel causing it to simply spill out over the part

after which the kerbal engineered nano-bot (which consist mostly of duct tape and crazy glue and is a whole 0.1% recyclable) that make up 90% of the actual fuel crawl along the surface until they find either a place to deposit the fuel or a place where it can be stored - however should this prove impossible the nano-bots are pre programmed to backtrack and crawl back into the original fuel tank

[42undead2]

To me it looks like the engine is connected to the fuel tank. Sometimes you will click through.

[Tw1]

Kerballogic.

I'd heard about something like this. So that's what they meant...

[Uocjat]

To me it looks like the engine is connected to the fuel tank. Sometimes you will click through.

no it is actually transferring fuel to the part

I've used this a fair few times with a backwards tri-coupler (3 into 1 instead of 1 into 3) since they only transfer fuel from the top node to the 3 bottom nodes but you can get around that by adding fuel lines from the fuel tanks to the tri-coupler but you don't need one to the engine

[Sir Nahme]

effectively you have given the plate a fuel volume by attaching it. not sure if it is supposed to work that way but I certainly understand why it is working that way

[Brotoro]

To me it looks like the engine is connected to the fuel tank. Sometimes you will click through.

No. I tried it without the fuel line connected first to be sure the plate was separating the fuel tank from the engine...and as I said, it did not work without the fuel line (as expected).

[Nao]

Haha i think i used it that way right from the moment we got fuel lines stock. It felt natural somehow.

[Zephram Kerman]

...and it works.

I did not know things worked this way.

This is the sound.... of science!