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To: lml@lancaironline.net
Date: Tue, 18 Apr 2006 23:48:41 -0400
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From: "Bill Kennedy" <bill_kennedy_3@hotmail.com>
Subject: RE: [LML] Re: request suggestions (LNC2 fuel system)
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My LNC2/320 has about as simple a fuel system as I could dream up. It has 
worked very well for about 350 hours since new.

I have Facet pumps for each tank (left, right, header). My fuel selector has 
Main (left and right), Aux (header), and Off positions. My fuel selector is 
almost always in Main. If I need to burn fuel from just the left or right 
tank, I turn the opposite fuel pump off. If I run the wing tanks dry (I 
don't), then I'd switch the fuel selector to Aux and turn the header pump 
on.

My biggest concern with this system was my reliance on electrical boost 
pumps. I overcame this by adding another battery. The boost pumps, 
electronic ignition, and other essential systems run off of either battery, 
and the batteries are isolated from each other.

I haven't added aileron trim yet, so I customarily use my wing fuel for 
lateral trim by turning off a boost pump when needed.

I have no idea whether or not there is such a thing as "old" fuel. Just in 
case, I drain the header occasionally, pour the fuel into the wing tanks, 
and refill the header with "new" fuel. The header tank is only used as a 
reserve tank. I test the header boost pump often.

Aside from using the wing tank boost pumps for trim, and testing the header 
boost pump, my system is "set and forget". Per Lancair instructions, I used 
3/8" tubing from all tanks. My leading edges are wet, giving me 30 gal per 
wing, 10.5 in the header (70.5 total fuel).

Bill Kennedy
N42BK