REFLECTOR: FUEL FEED

[SlvEgl99 at aol.com]

My XL, which I built at the factory under the builder's assistance proram  
has a vent from the top rear corner of each main and one from top center  of the 
sump, all terminating in a mainfold mounted 18" or so above the sump  on the 
rear bulkhead. From the manifold there is one line terminating in a check  
valve designed to provide a vent in the event the primary vent becomes clogged,  
just as Scott B. says. The main vent then goes to the top of the fuselage and  
then is turned in a gooseneck to exit at the bottom of the fuselage.
 
Never a problem with venting or with siphoning fuel, and only an occasional  
issue with uneven feed, which I attribute to leaking fuel caps.
 
I agree with Scott B. That is re-engineer stuff at your own risk. What is  
published in the builder's manual is generally pretty damn good and I would say  
if you vary from that you are in fact building a more experimental aircraft 
than  you perhaps think. I varied only infrequetly from the book, and then only 
with  non-structural and "non-system" stuff. 
 
I think if someone really wants to experiment a lot with his aircraft, and  
more power to those who do, he must recognise that what is in the manual has  
worked well in the past. Of course those of us who stick to the manual have of  
course gained benefit from the experience of those brave souls who want to  
reinvent the wheel. 
 
Bob Wood
N658SE
250 hours flying
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