Sender: <marv@lancaironline.net>
To: lml@lancaironline.net
Date: Mon, 07 Jan 2008 00:29:54 -0500
Message-ID: <redirect-2633907@logan.com>
Received-SPF: none
 receiver=logan.com; client-ip=66.150.29.112; envelope-from=n103md@yahoo.com
Subject: Re: [LML] fuel question 235/320/360
From: "bob mackey" <n103md@yahoo.com>
User-Agent: SquirrelMail/1.4.9a
MIME-Version: 1.0
Content-Type: text/plain;charset=iso-8859-1
Content-Transfer-Encoding: 8bit
Importance: Normal

In a message dated 12/31/2007 1:39:57 P.M. Central Standard Time,
randylsnarr@yahoo.com writes:

>   I am looking for feedback from those who pull fuel directly from
> their wings that do not have slosh boxes installed. My fuel pickups
> are in the typical place (BL 50 about 2/3 of the way back between
> the front and rear spar).
>   I am contemplating changing the fuel system with a 3 way valve
> to pull from Left Main and Right tanks.
>   I would be very interested to know if you ever unport the
> fuel and under which conditions it happens if ever.

Randy:
My 235 has a 2-way fuel selector (wings/nose/off). In the 235 wing,
the D-section is the fuel tank. The pickup is at the aft inboard
corner, just in front of the spar. I routinely run the wings completely
dry before switching to the nose tank in flight. The engine is starved
of fuel for about 3-5 seconds. I have not found that any amount
of slip has caused unporting. Your mileage will vary, as you
have a completely different fuel tank location and shape.

Each wing tank is connected to a rattle pump and check valve.
The output of the check valve goes to the selector valve, and also
to the header tank. Turning on a pump transfers fuel from the
respective wing to the nose. So far, I have no complaints since
switching to this system.


BTW, here's a link to an earlier thread on what could happen if the
three-way-valve leaks:
http://lancaironline.net/lists/lml/Message/40862.html