Sender: <marv@lancaironline.net>
To:  lml@lancaironline.net
Date: Wed, 12 Jun 2013 23:41:41 -0400
Message-ID: <redirect-6322528@logan.com>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.192.171; envelope-from=pjdmiller@gmail.com
From: Paul Miller <pjdmiller@gmail.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Subject: Legacy Heater valve
Mime-Version: 1.0 (Mac OS X Mail 6.3 \(1503\))

Someone mentioned the Legacy bleed hole for the heat muff is the largest =
in the upper deck.  I checked and it surprised me that on my Legacy the =
hole is plumbed to the heat muff 100% of the time and dumps overboard =
when heat is OFF.   IF the heat control is opened in the cockpit, the =
valve on the inside of the firewall opens up and it appears the =
overboard and cockpit exits are in parallel.  In other words, it dumps =
overboard and into the cabin.=20

So, in warm weather, why wouldn't we want that hole closed off?    Does =
the heat muff need that airflow?  I used heat maybe 3 times last year.  =
What is the effect of plumbing the valve so that it closes off the exit =
from the upper deck?  That way you get heat when needed but no losses =
when not needed.  The muff would not get airflow in this case.   I would =
not do that unless I had some idea of the effects but it seems a huge =
cooling loss 100% of the time when it really isn't needed.

Paul
Legacy
Calgary=