Need help with fuel drain

[mattig89ch]

Hello all,

I'm trying to get my first probe in career mode to duna. I think I have the thrust to do it, But I keep running into a problem. For some reason my fuel stops draining from my outer tanks onto my secondary engines. This is using some rudimentary Asparagus staging here.

Basically I have 4 large outer tanks, draining into 4 smaller inner tanks, which then drain into one large interior tank. Little complicated, but it works. now, I get to about 100k, then one of my smaller tanks stops using the larger outer tanks fuel, and stars draining its own fuel. so, as I'm climbing, I jettison the outer tanks, then 3 of my rockets start relying on their fuel, and the 4th runs out.

According to the flight log, nothing bad has happened. and I still have complete control of all my engines, so nothing came apart.

I would upload my craft, but I think the site I was using has been taken down (megaupload). If you want to see my craft in action, I have some screen shots to show which tank is draining fuel when it shouldn't:

You can see the fuel lines are still intact, but its draining fuel

You can see, I still have control over the engine.

[Daishi]

You might have a fuel line around the wrong way somewhere? Its all i can think of :\

[I_Killed_Jeb]

You might have a fuel line around the wrong way somewhere? Its all i can think of :\

this is almost certainly it, as the symmetry can get wonky in VAB when you move sections around. also make sure you don't have stray fuel lines connecting the outside tanks somehow

[mattig89ch]

ok, so if you look closely, you can see I have 2 fuel lines going from those big outer tanks into the smaller tank, I think it was getting confused and not knowing where to pull fuel from. Dunno why only that tank and not all of them, but there you go. anywho, removed one of those fuel lines, and it works!

[I_Killed_Jeb]

Excellent! Please change the tag of the thread