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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