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Bryan,
Flowing both wings to the engine
simultaniously in a low wing airplane is not a good idea. It is unlikely
that they will burn equally and if one pickup sees air, that's what will go
to the engine since it's the least resistance.
If you install an automatic header feed system, you
can feed the header from both wings at the same time. The auto system keeps the
header full, or almost full, as long as you have fuel in either wing. The stock
LNC2 system, with the addition of an automatic header filling system, is a
very safe, simple and dependable system. This gives you the advantage of
flowing both wings together without the hazard of a direct (both) wings to
engine hookup.
Even if connecting both wings to the engine at the
same time were a good idea (it's not) the 1/4" line is inadequate. I think that
you'd be happier, and safer, installing an auto system.You'll need to install
two float switches (Spruce p/n 6905-400, $27.75 each) in the header and
make a simple circuit consisting of maybe 15 bucks worth of Radio Schlock
parts.
Bill Harrelson
N5ZQ 320 1,650 hrs
N6ZQ IV under construction
----- Original Message -----
Sent: Friday, March 20, 2009 11:43
AM
Subject: [LML] Fuel selector Valve
question
I want to run this idea I have past the group.
My current set-up is 1/4" lines coming from my wing tanks to the my
header. Then a 3/8" line feeds my engine. In this configuration I
can only feed the engine from Header only. This is the stock Lancair 320 fuel
system.
I would like to be able to run my engine off my wing tanks if needed but
I don't want to re-plumb the wings with 3/8" lines. Can I connect the
1/4" wing tank lines into a "T" with a 3/8" exit and run the line to the
selector valve? Essentially the wings would not be able to be selected
but they would feed at the same time equally.
Would this idea work? And if so what type of Andair valve would I
need? One with just a Left/Right/OFF And I would have them custom
engrave the bezel to read Wings/Header/OFF
Thanks
Bryan
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