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Subject: Re: [LML] Re: Header Tank in the 360
From: Colyn Case <colyncase@earthlink.net>
In-Reply-To: <list-6363465@logan.com>
Date: Mon, 8 Jul 2013 21:06:27 -0400
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Message-Id: <E2090722-431C-4569-AA7A-3F25C5E8088A@earthlink.net>
References: <list-6363465@logan.com>
To: "Lancair Mailing List" <lml@lancaironline.net>

Hey, if you were really good you could write a DCL script and run it on =
a micro-vax underneath the header tank to tell the pump when to turn on =
and off.


On Jul 7, 2013, at 10:50 AM, Jeff Peterson wrote:

Hey Rob,

If you scan the archive you will find this issue vigorously debated =
several times.

Reminds me of the Mac vs PC debate (or Unix vs VMS for us old fogeys) =
(or Python vs C for younger guys). =20
Most of us just keep repeating whatever argument validates the =
particular choice we selected.

As you know, I put the fuel in the outer wing bays and use the header =
space for avionics.
I have 42 gal usable.  I put in slosh gates. I am very happy.

reasons for my choice:

-There are, oh maybe a million, airplanes configured this way....most =
aircraft designers make this choice.
-Lancair switched to this system with the Legacy.
-If I have an off-airport landing and break things, I would rather not =
get doused with fuel.
-In the header system, if you leave a facet pump on too long you pump =
fuel overboard.
-In the header system if you forget to turn on the facet pump every 20 =
min. the engine dies.
-Yes, these last two problems can be fixed by automating transfers...but =
that adds a system with its own failure modes.
-The headers space is really useful for ahrs, rf splitters, pitot-static =
manifolds, misc. circuits, regulators etc.

To each his own....but the fuel-in-the-wings system is in fact a very =
reasonable choice.

--=20
Jeff Peterson
99.8%=20