Rich wrote:

Yes, I do know more is sucked out than returned. But I'm sucking from
2 tanks that are T'd & returning to only one of those tanks. Both do
have their own vented caps.

In my experience with Cessna's the tanks rarely equalize
for some strange reason.

Does the fuel line friction have anything to do with it... outboard
tank being further away?

Rich

Why are you sucking from both Rich? If you do that you might want
to consider a header tank and return the fuel to the header tank.

Paul Lamar

Pumping from two tanks connected by a T will cause one tank to
run dry and the engine to quit while the other tank has a lot of fuel
still in it.  This is why all pumped multi-tank systems have a fuel
selector.  Think about it, do you think everybody is just switching
tanks for fun?  If you drain the fuel by gravity into a VENTED
sump and pump from the sump, it will work.  Recycling fuel to the
sump may cause vapor locking on a hot day with a long taxi (like
leaving an airshow).

Please review the CD, there was much discussion of this and this
sort of stuff will get you hurt.  Slavishly copy a certified A/C fuel
system which is configured like your A/C.

Be very careful with fuel systems, they demonstrably do NOT behave
like you might think they will and people have died verifying this.

Bill
Long EZ builder & pilot
mechanical engineer

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