some situation where the pumps are on but the sump is not being fed.

I was going to vent the sump to the tanks and vent the tanks, this prevents any vapor

accumulation

in the sump after initial fueling.
...Chrissi

Chrissi, This whole pump thread makes my head hurt just reading it!
I hope it is much eaiser to use than it sounds. Your racing experience
will help here, (keeping things straight when under extreem stress),
but the item we all need to remember is, READ ALONG WITH ME,
THE MOST COMMON FAILURE OF EXPERIMENTAL AIRCRAFT
IS ENGINE OUT OR LOSS OF POWER DUE TO FUEL FEED
PROBLEMS. The FAA says over 30% of homebuilts have some sort
of fuel related problem in the first 40 hours. I have even seen
higher percentage figures used in some studys. I am working on
a one-design aircraft for a future build and it will have fuel tanks
that are finished and tested outside the aircraft no matter how
hard this might be. I can't see why when we have so much tied
up in our planes everybody wants to use some complicated fuel
arrangement. Bulent had a good looking valve, but I haven't seen
one other one I would trust. Spend the money get a good andair
valve, or the equivlent,  as us engineers like to say. Then practice
in your hangar and TRY TO MAKE IT FAIL. If you can't make the
engine stop without cutting the mains your ready! You won't
be supprised. Sorry for the length this is a pet peeve of mine.
Bill Jepson

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.