Mailing List flyrotary@lancaironline.net Message #23862
From: WALTER B KERR <jbker@juno.com>
Subject: Re: [FlyRotary] Re: fuel pump mounting ( fuel system architecture)
Date: Tue, 14 Jun 2005 20:54:17 -0400
To: <flyrotary@lancaironline.net>

On Tue, 14 Jun 2005 16:23:22 -0500 "Mark R Steitle"
<mark.steitle@austin.utexas.edu> writes:
Jerry,
You forced me to do a sketch.  So, here it is.  Mark ---------------------------------------
Mark, why do you choose not to return fuel to the tank instead of to the
selector valve? I have been to 17000 feet in Fla on auto gas and when I
landed the tanks feel very cool to hand and this is the fuel that the
pump sees rather than the elevated temps coming back from the engine bay.
I have run tanks dry above 10000 and the engine quickly fired off as soon
as I switched tanks so returning fuel to the tank has passed any test I
can think of. The fact that the system apparently boils someplace along
the way during ground shutdown but quickly clears when the pump is turned
on says that if I had a small orifice that it probably would take longer
to bleed the vapor rather than returning it to a cooler tank.

Bernie
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