Return-Path: Sender: (Marvin Kaye) To: lml Date: Thu, 06 Feb 2003 22:19:52 -0500 Message-ID: X-Original-Return-Path: Received: from tomts22-srv.bellnexxia.net ([209.226.175.184] verified) by logan.com (CommuniGate Pro SMTP 4.0.5) with ESMTP id 2011384 for lml@lancaironline.net; Thu, 06 Feb 2003 20:58:42 -0500 Received: from a ([67.69.56.113]) by tomts22-srv.bellnexxia.net (InterMail vM.5.01.04.19 201-253-122-122-119-20020516) with SMTP id <20030207015841.XZZZ7091.tomts22-srv.bellnexxia.net@a> for ; Thu, 6 Feb 2003 20:58:41 -0500 X-Original-Message-ID: <03b401c2ce4c$f327bfa0$8d344543@a> From: "Ian B. Crowe" X-Original-To: "Lancair Mailing List" Subject: LNC2 extended wing tanks X-Original-Date: Thu, 6 Feb 2003 21:02:20 -0500 Organization: Corvi Trade Consultants Inc MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_03B1_01C2CE23.0A0E9420" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 This is a multi-part message in MIME format. ------=_NextPart_000_03B1_01C2CE23.0A0E9420 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable IMHO I would not try to extend the tanks outboard of the aileron bell = crank area, given the fact that the skins are on and sealed, unless you = are prepared to also access thje inboard side of the inboard aileron = compartment bulkhead in order to seal it. The part of the process that concerns me is the fact that you will also = have to cut the bulkhead on the inboard side of the bell crank = compartment to allow you to fit the "flow channels. You can only seal = the outboard side of the bulkhead. This would mean that you would have = gas migrating down through the honeycomb core on the inboard side of the = bulkhead. Where it would end up and when it would arrive there is a = matter of conjecture but I would bet that migrate it will. If you cut = open the wing skin on the inboard side and seal the hole for the "flow = channels" then that would be fine. I have tank extensions but I built them in before fitting the bottom = skin. I would make the bottom flow channel as large as you conveniently = can. I have the Lancair recommended installation and the gas is a = liitle slow to flow into the inboard section of the tank. The vent = portion at the top of the tank I believe, is large enough to vent the = gas whilst filling the tank and more than large enough for normal = operations. You already have an Al tube running through the tank and into the = aileron bell crank area. Obviously Lancair do not worry about flexing. = They also recommend an Al tube for the vent portion of the extended tank = so again I do not see why you could not use tube for the bottom channel. I can see no reason for "flapper valves" in that area. In fact I would = not recommend them as all they would be is a possible restriction to the = natural flow of the fuel into the main portion of the tank. If you fit = slosh doors at the most inboard end of the main portion of the tank, = when the tank is first built then these are invaluable to help stop the = fuel from unporting when the tank is low. I fitted slosh doors. Hope this helps Ian Crowe C-FKRO LNC2 (10 plus hours and counting) ------=_NextPart_000_03B1_01C2CE23.0A0E9420 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

IMHO I would not try to extend the tanks outboard of = the=20 aileron bell crank area, given the fact that the skins are on and = sealed, unless=20 you are prepared to also access thje inboard side of the inboard aileron = compartment bulkhead in order to seal it.

The part of the process that concerns me is the fact = that you=20 will also have to cut the bulkhead on the inboard side of the bell crank = compartment to allow you to fit the "flow channels. You can only = seal the=20 outboard side of the bulkhead. This would mean that you would have = gas=20 migrating down through the honeycomb core on the inboard side of the=20 bulkhead. Where it would end up and when it would arrive there is = a matter=20 of conjecture but I would bet that migrate it will. If you cut = open the=20 wing skin on the inboard side and seal the hole for the "flow = channels"=20 then that would be fine.

I have tank extensions but I built them in before = fitting the=20 bottom skin. I would make the bottom flow channel as large as you=20 conveniently can. I have the Lancair recommended installation and = the gas=20 is a liitle slow to flow into the inboard section of the tank. The = vent=20 portion at the top of the tank I believe, is large enough to vent the = gas whilst=20 filling the tank and more than large enough for normal = operations.

You already have an Al tube running through the tank = and into=20 the aileron bell crank area. Obviously Lancair do not worry about = flexing. =20 They also recommend an Al tube for the vent portion of the extended tank = so=20 again I do not see why you could not use tube for the bottom=20 channel.

I can see no reason for "flapper valves" in that = area. =20 In fact I would not recommend them as all they would be is a possible=20 restriction to the natural flow of the fuel into the main portion of the = tank. If you fit slosh doors at the most inboard end of the main = portion=20 of the tank, when the tank is first built then these are invaluable to = help stop=20 the fuel from unporting when the tank is low. I fitted slosh=20 doors.

Hope this helps

Ian Crowe

C-FKRO LNC2 (10 plus hours and=20 counting)

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