X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3484868 for flyrotary@lancaironline.net; Mon, 09 Feb 2009 18:39:55 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090209233914.WSZT2342.fed1rmmtao102.cox.net@fed1rmimpo02.cox.net> for ; Mon, 9 Feb 2009 18:39:14 -0500 Received: from BigAl ([72.192.132.77]) by fed1rmimpo02.cox.net with bizsmtp id DzfD1b00T1gM2g804zfDPA; Mon, 09 Feb 2009 18:39:14 -0500 X-Authority-Analysis: v=1.0 c=1 a=ftL7gXGnz18t-I4BJIAA:9 a=zGnTyZnvgG65ECHcbxUA:7 a=ei035fMhl54sVizV1HUrHPOhyvcA:4 a=hpF-ijbX5cwA:10 a=ZiyFJ7rXogyplL6tO2UA:9 a=jnSQdNshqmAJ0-LK53gA:7 a=TlMlD7u2efMnLfNUg2IwVeHV1oUA:4 a=37WNUvjkh6kA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: hauling gas Date: Mon, 9 Feb 2009 15:39:35 -0800 Message-ID: <5ED569EF02A84D55B1AF032A134E6BBB@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C98ACC.9C3525A0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C98ACC.9C3525A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Whatever you decide to do, be sure to ground everything properly before removing the fuel cap. One spark could ruin your whole day. =20 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. =20 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.=20 =20 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. =20 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. =20 I mention this because there seems to always be a lot of confusion among = the Velocity folks about 'grounding'. =20 Al G =20 =20 =20 =20 ------=_NextPart_000_0011_01C98ACC.9C3525A0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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

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