Uneven fuel burn

[strider3]

I am using 4 mainsails with a C7 adapter on top of each fuel stack. It appears that one of the C7's is not transferring fuel (see image)? You'll notice the 2nd main engine fuel meter is dropping faster in the staging fuel meters, on the left?

I've reviewed the engines (all at 100%) and I see nothing on the C7's which would "turn on" or "turn off" fuel transfer. I'm at a loss, at this point. It certainly seems like the C7 atop this engines stack is not transferring fuel?

[Snark]

Are you using fuel ducts?  If so, have you reviewed to make sure that you're not missing one, or have one turned the wrong way 'round, or have an extra one, or the like?

[Signo]

I experienced the same issue: even if it does not look like (and you used simmetry, angle snap and all the stuff available) it might be wrongly attached - just try to rebuild that section in the VAB; it is usually enough to solve the problem. 

[strider3]

I am not using fuel ducts, Snark, as the C7's reside atop the fuel stack and should not require ducts? Although a reaction wheel is installed between the top tank and the C7's, the other 3 stacks seem to operate properly.

Signo, I tried to rebuild once but it didn't help. Curiously, I have noticed that the Jumbo 64 fuel tanks sometimes line up differently with the next level? In the below image you will see that the 64's are offset, judging by the line of "piping" on the side of each? In my original post, this piping all lines up, tank to tank. I don't think that means anything, but I point it out all the same. The fact that 3 stacks work and 1 doesn't makes me think you are correct and some little niggly placement thing is preventing one C7 from transferring fuel. I will try again

 

Edited June 22, 2016 by strider3
forgot to add image

[Signo]

My last suggestion is to try to use alt+click to attach the parts.

But, alas, this is KSP so it might be useless.

Good luck.

[Jarin]

Okay, here's what you need to do, since those are not terribly complicated constructions.

Delete those stacks. Then turn off symmetry and rebuild ONE radial stack, preferably the one facing due south (right side in that screenshot) or at least one of the cardinal directions. Once that one is set properly, pick up the whole stack from the piece closest to the root, turn on symmetry again, and re-attach.

The problem is broken symmetry. I suspect from the misaligned tanks that you built them in random order, attaching one orange tank in full symmetry southside, then putting another orange tank on the NW symmetry unit instead of building it on the same side. It shouldn't matter, but it sometimes does.

Edited June 22, 2016 by Jarin

[strider3]

Thanks gang, Will give it another shot shortly.