Message-ID: <016101bf814a$fc00b110$82c8c8c8@t720>
From: "Ed McCauley" <ed.mccauley@bltinc.com>
To: <lancair.list@olsusa.com>
References: <200002261741_MC2-9AC3-DF2A@compuserve.com>
Subject: Re: Gas filler neck grounding
Date: Sun, 27 Feb 2000 12:49:22 -0500
Mime-Version: 1.0

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Hi gang,

Just a thought....  I think the WORST time to touch the filler nozzle
to the filler opening is just after you've opened it!  That is when you
have a high static build up (presumably from flying) AND you have the
maximum amount of fuel vapor (the explosive state) due to the agitation
of moving the plane.  Once the charge is dissipated (best done by
establishing a connection to ground AWAY any fuel vapors), then its good
to keep electrical contact (via a nozzle or grounding wire) to prevent the
static buildup that occurs during fuel transfer.

After this thread, I'm thinking about connecting my vent lines and caps to
my wing tie-downs (recessed) and using them as the spot to connect the
grounding wire.  Any thoughts?

Another question: This thread is assuming that the nozzle tip is a good
source for balancing the charge between aircraft and ground.
Is this correct?
Is the fuel in the line a conductor?  Is there a hidden wire connection
between nozzle and the pumping apparatus?

Also, someone asked why this isn't a problem for cars.  Seemed like a good
question and I don't recall seeing an answer for this.  I heard that toll
takers of old used to get quite a jolt from vehicles.  Well, no one will
ever accuse the LML of cursory coverage of an issue :)

Ed McCauley
Lancair IVP -23.68%
Milford, NJ


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