Dave
You might consider alternative tank outlet fittings which enable you to use AN
fittings and 5052 alloy tubing right from the tank outlet - space is a bit
limited
down there. I made a couple with 1/4 NPT for fuel feeds and 1/8 NPT for water
drains(replacing F09C). The water drains are 90 degree elbows straight out
of the tank outlet and use andairs SS draion valves. They are accessed from
holes in the inspection panels required below the tank outlets. Several other
builders have gone along similar lines indeed, Graham is now manufacturing the
tank outlets. if you want some pictures of teh set up contact me directly.
I have got rid of the sight guage and instead have installed one fuel guage and
a 1/2 BSP plug in the top of the tank to enable direct visual inspection and
dip stick as per the spam cans. None of this is yet PFA approved but I know one
other builder has submitted his mod (almost identical ) for approval.
Regards Paul Stewart #432
----- Original Message -----
From: DJA727@aol.com
Cc: georgec@sncorp.com ; jas56d@msn.com ; Mv727cap@aol.com
Subject: Fuel system changes
I am getting ready to install the fuel tank and am looking at changes to the
system. As a new builder, I am not 100% familiar with some of the things
mentioned
on the internet. Specifically, the fuel drain mod I have seen mentioned is
one of those things. Here is what I am planning to do:
On the 1/8 inch threaded holes on the output fittings from the tank, I will
install
a fitting to a fuel hose running to a quick drain valve for each tank -
reserve and main.
I will install a short section of hose out of the output fittings, then to an
adapter fitting to transition to solid aluminum lines to the selector valve and
to the firewall.
Since I will use both 1/8 inch feemale holes on the output fittings, (F09C)
I will not have the clear tube for fuel level check. I will instead use a gage
with a possible flexible dip stick for a gut check on the fuel level.
I am thinking that I might put in 2 gascolators, but after reading other's
stories
I would install one Andair gascolator after the fuel selector valve.
The selector valve would probably get mounted in a more convenient place --
like
on the top of the center console.
These are ramblings of a new builder. I like to be able to drain fuel from the
lowest point of the tank -- unlike my Twin Comanche which drains the lowest
point of the fuel system. With this setup, both tanks can be drained directly
with the port for the drain valve being at the low point of the output valve.
Back to work,
Dave
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