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Bernie,
I'm running Tracy's efi pumps. The main pump is mounted low on the
firewall, and the boost pump is just after the Andair valve. I wanted
it as low as possible, in a cool location, and as close to the tanks as
I could get it. I may move the main pump to the same location, but I'm
concerned about having pressurized fuel in the cabin. Mark
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of WALTER B KERR
Sent: Wednesday, June 15, 2005 7:53 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: fuel pump mounting ( fuel system architecture)
On Wed, 15 Jun 2005 07:12:04 -0500 "Mark R Steitle"
<mark.steitle@austin.utexas.edu> writes:
I think that makes a big difference in
whether or not a bleed circuit is needed. The closer to the tanks, the
less the need for it. I had discovered a potentially fatal design flaw
and found a simple remedy. With air in the lines, the efi pumps simply
could not overcome the back pressure from the pressure regulator until
they were well primed.
---------------------------------------------
Hi Mark,
Makes me feel better now that I understand you are returning fuel to the
tank.
What pumps are you running because the Walbro pumps seem to reprime with
or without air in the line at least under all conditions I run into.
Seems like Al G said he has similar experience.
My pumps are about 5 feet of #6 line from the tank and maybe 12 inches
higher than the tank.
Bernie
Homepage: http://www.flyrotary.com/
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