REFLECTOR: No management fuel systems

[vance atkinson]

For the Velocity builders,

In response to my letter to Burt Rutan about the T'eed fuel lines, his 
response is written unedited below.
Vance Atkinson
/
"Vance,/
/No, the fuel will not jump an air gap to go overboard.  It will dump 
out the cap only if you start with more than half fuel total.  If you 
have both tanks feeding one sump, any change in vent pressure will 
transfer fuel to the tank that is the lowest pressure.  If you have only 
1/4 fuel you can end up with all the fuel in one tank and air in the sump./
//
/
/
/I am very concerned about your statement "some fuel pumps" in the line. 
  Fuel systems often do things not expected.  Check Part 23 FAA regs for 
certification.  You cannot certify a system that pumps fuel from more 
than one tank at a time./
//
/
/
/The origional POC volkswagon-powered EZ had an unusual system, somewhat 
like you describe.  It worked for a long time without problems, but 
failed the engine over Phoenix on the way home from Oshkosh./
//
/
/
/If you can fly without a cap on one side and still use all the fuel, I 
would be very surprised./
/
/
/Burt"
/
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