Mailing List lml@lancaironline.net Message #50824
From: Tim Jørgensen <tj@yacht-pool.dk>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: Fuel selector Valve question
Date: Wed, 25 Mar 2009 08:16:30 -0400
To: <lml@lancaironline.net>
"I do have an auto fill system in place for the header. I have 2 sensors (high and low) in the header and they activate the wing transfer pumps to keep the header full. I was just worried that if my header line clogged for any reason I would not be able to get fuel to from another source (wings)."
 
I have installed the very elegant autofill computer with sensors from PP-Avionics.
Realizing that this introduces yet another possible source of failure, I have installed two transfer pumps in series from either wing tank.
The primary pumps run automatically off the fuel computer, the secondary (backup) pumps run off manual illuminated switches installed on either side of the fuel computer and are fed from another circuit breaker for absolute redundancy.
Yes, the weight penalty is some 1.5 pounds, but I think it is well worth it since I won´t have to abort a mission in case of a broken fuel computer or transfer pump.
 
Anyway, as nature would have it, I probably wouldn´t detect a failed fuel computer until the engine went silent..........
 
Regards
Tim Jorgensen
360 Gamma (MKIIOBFB) in the paint shop
 
 
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