X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from yx-out-2324.google.com ([74.125.44.28] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3485666 for flyrotary@lancaironline.net; Tue, 10 Feb 2009 08:21:21 -0500 Received-SPF: pass receiver=logan.com; client-ip=74.125.44.28; envelope-from=msteitle@gmail.com Received: by yx-out-2324.google.com with SMTP id 31so258741yxl.7 for ; Tue, 10 Feb 2009 05:20:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=gLEZ2NsbPvyUfw57aFuFngLGoBqlN5f5jRMZZ8JBcB4=; b=TRDawXASfH/6Po9O3lga+cAQ5u8nFEavxroVHRn7ln2z6E8MEPEznWnLlM7VEAEo3l 6RPzMfJTimAXdz99txmVkyugP+0WRahfnEN8SN+AOrQwXjC6GJJBX7XlIQ2VFwI1H89z fkpzTjTzC1niIaSWykmmGge7UcWefiicXeuGI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=IzShL8WIteZdgW3SEG5BhI7MZWjYCWUxb2HALbICG6uJ7phNeY8KwMnipcfHTFDuly F4HbJpwDYR0cPlfPezKei4+fop88Le7Ek+h2SzUd8ToOV8wx+oDvZsCvcvNwrfPQoIKk u1ZA0z5F7ZqU0UeApmezbcE9ioldgPcuJxNQc= MIME-Version: 1.0 Received: by 10.100.141.5 with SMTP id o5mr3247899and.53.1234272044590; Tue, 10 Feb 2009 05:20:44 -0800 (PST) In-Reply-To: References: Date: Tue, 10 Feb 2009 07:20:44 -0600 Message-ID: <5cf132c0902100520v2148f8ei5292acaf572bd4a9@mail.gmail.com> Subject: Re: [FlyRotary] Re: hauling gas From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e644d6f6c628090462905ad2 --0016e644d6f6c628090462905ad2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Good points Al. When building my wings, I installed ground leads from the fuel cap rings to A/C ground. And the capacitive fuel probes, which are metal and run the length of the fuel tanks are also tied to a/c ground. So, prior to fueling, I ground the fuel trailer to the a/c via the exhaust pipe and also ground the fuel tank vents to the metal hangar. My fuel trailer has regular gas pump hose with an integrated ground. Before I purchased my fuel trailer I used plastic gas cans and I always got a very uneasy feeling when refueling. Mark S. On Mon, Feb 9, 2009 at 5:39 PM, Al Gietzen wrote: > Whatever you decide to do, be sure to ground everything properly before > removing the fuel cap. One spark could ruin your whole day. > > Mark S. > > Yes; but 'grounding' in the case of a plastic airplane has a little > different meaning. Grounding the airplane to the vehicle is meaningless > unless you are grounding metal that is in contact with the fuel in the > tank. > > > > You need to ground (connect) the fuel in the tank to the hose (nozzle; > whatever). The static potential can build up between the hose and the fuel > in the tank because of the friction in the hose dragging off some > electrons. Since the fiberglass tank in non-conducting, you need to ground > the hose to some metal that is in contact with the fuel in the tank. > > > > My simple approach is to use a metal chain, which serves as cap retainer, > which hangs from the metal cap flange into the fuel, back to the cap. > Contacting the end of the hose to cap/cap flange prior to removal takes car > of any residual. Maintaining contact between the hose and the flange > (keeping the cap chain, or cable, hanging into the fuel) keeps fuel and hose > at the same potential. > > > > One other lesser concern is if you are re-fueling immediately after > landing, particularly in low humidity. There may be residual static charge > on the surface due to friction with the air. This is easily dissipated by > wiping with a damp cloth. It will dissipate on its own if the plane has > been parked for a while. > > > > I mention this because there seems to always be a lot of confusion among > the Velocity folks about 'grounding'. > > > > Al G > > > > > > > > > --0016e644d6f6c628090462905ad2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Good points Al.  When building my wings, I installed ground leads=  from the fuel cap rings to A/C ground.  And the capacitive = fuel probes, which are metal and run the length of the fuel tanks are also = tied to a/c ground.  So, prior to fueling, I ground the fuel trailer t= o the a/c via the exhaust pipe and also ground the fuel tank vents to the m= etal hangar.  My fuel trailer has regular gas pump hose with an i= ntegrated ground.   
 
Before I purchased my fuel trailer I used plastic gas cans and I alway= s got a very uneasy feeling when refueling. 
 
Mark S.

On Mon, Feb 9, 2009 at 5:39 PM, Al Gietzen <ALVentures@cox.net> wrote:

<= span style=3D"FONT-SIZE: 12pt">Whatever you decide to do, be sure to ground= everything properly before removing the fuel cap.  One spark could ru= in your whole day. 

<= span style=3D"FONT-SIZE: 12pt"> Mark S.

Yes; but 'grounding' in the cas= e of a plastic airplane has a little different meaning. Grounding the airpl= ane to the vehicle is meaningless unless you are grounding metal that is in= contact with the fuel in the tank. 

 

You need to ground (connect) th= e fuel in the tank to the hose (nozzle; whatever).  The static potenti= al can build up between the hose and the fuel in the tank because of the fr= iction in the hose dragging off some electrons.  Since the fiberglass = tank in non-conducting, you need to ground the hose to some metal that is i= n contact with the fuel in the tank.

 

My simple approach is to use a = metal chain, which serves as cap retainer, which hangs from the metal cap f= lange into the fuel, back to the cap.  Contacting the end of the hose = to cap/cap flange prior to removal takes car of any residual.  Maintai= ning contact between the hose and the flange (keeping the cap chain, or cab= le, hanging into the fuel) keeps fuel and hose at the same potential.

 

One other lesser concern is if = you are re-fueling immediately after landing, particularly in low humidity.=  There may be residual static charge on the surface due to friction w= ith the air.  This is easily dissipated by wiping with a damp cloth.&n= bsp; It will dissipate on its own if the plane has been parked for a while.=

 

I mention this because there se= ems to always be a lot of confusion among the Velocity folks about 'grounding'.

 

Al G

 

 

 

 

<= /div>

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