Message-ID: <02b301bf32a6$9f27aa40$16f5acce@default>
From: "Ian B. Crowe" <ian.crowe@sympatico.ca>
To: "Marvin Kaye" <lancair.list@olsusa.com>
Subject: Fuel pump installation
Date: Fri, 19 Nov 1999 10:55:40 -0500
Organization: Corvi Trade Consultants Inc
Mime-Version: 1.0

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I have no definitive words of wisdom for the positioning of the fuel pump.
I notice there has been no reply to the post requesting help on this so here
goes my "Two cents worth"  Canadian.  I am also going to put the fuel pump
on the rear side of the firewall. So at least I am a true believer!

1.    I feel that it will be away from the under cowling heat which has to
be beneficial for the fuel and will help it to         not to vaporise.
Also the electrics of the pump will love you for keeping them cool.

2.    It is a lot easier to push vaporised fuel than to pull it .  With the
pump in the cockpit you will always have             relatively cool fuel to
suck compared with the fuel on the other side of the fire wall.

3.    If it leaks or even weeps you will smell it at once and hopefully be
able to deal with it before it becomes a         major problem.  The
opposite is true if it is under the cowling and the heat source is always
there in flight.          Also under the cowling means that you never get to
see it  unless the cowling is off or the leak is heavy.
Remember that you do not need the pump running all the time, landing, take
off, climb out and at tank                 change time should do it.  The
rest of the time the engine driven pump will be running the system and the
lines will be under suction.

4.    I am taking good care in the installation of the pipework to and from
the pump, using the same level of care     as I have done with the fuel
changeover valve. Again this is cockpit located.  Proper clamping to avoid
vibration is mandatory. I shall  pressure test the whole system with shop
air at  90psi.

Please bear in mind that I have no professional qualifications to advise you
and the foregoing is my attempt to satisfy good practice.  Also I am a long
way from the reach of your convuluted tort system!!!!!!!!  Got to get the
obligatory hit in about the legal profession.  Seriously though that is my
considered opinion and I would love it if one of our better qualified
brethren could put forward a counter proposal.  Hate to rip out all that
lovely bent pipe but there it is.  (All my lines are solid 3/8" aluminum)

Kind regards

Ian Crowe

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