Mailing List lml@lancaironline.net Message #1543
From: rcblumenstein <rcblumenstein@sysdyne.com>
Subject: Re: Fuel selector valve "both" in low wing aircraft
Date: Wed, 06 Jan 1999 19:48:01 -0600
To: <lancair.list@olsusa.com>
Cc: <TByrnes133@aol.com>, <ticavers@hotmail.com>
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This is in reply to about Tristan Cavers concerns about a "both" position
in a fuel selector for a low wing plane. Tom Byrnes replied: ">You mentioned that you do not have a header tank and that you have a fuel
selector that has positions for R - L - Both and off.  A both position in a
low wing aircraft is considered dangerous by the FAA and not allowed in a
certified low wing aircraft because if one tank unports or runs dry before
the
other one the fuel pumps would suck air even though fuel is present at the
other port."

I had flown for some years a '79 Rockwell Commander 114A which had a "Both"
position for the fuel selector.  It too was a certificated low wing plane.
They must have done something right in the design to pass the FAA
certification.

Richard (Dick) Blumenstein
E-Mail:  rcblumenstein@sysdyne.com
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