X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Wed, 04 Oct 2006 20:23:29 -0400 Message-ID: X-Original-Return-Path: Received: from ms-smtp-01.tampabay.rr.com ([65.32.5.131] verified) by logan.com (CommuniGate Pro SMTP 5.1c.5) with ESMTP id 1442000 for lml@lancaironline.net; Wed, 04 Oct 2006 18:57:49 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.32.5.131; envelope-from=tednoel@cfl.rr.com Received: from tednoel (94.85.118.70.cfl.res.rr.com [70.118.85.94]) by ms-smtp-01.tampabay.rr.com (8.13.6/8.13.6) with SMTP id k94MvHWX020693 for ; Wed, 4 Oct 2006 18:57:17 -0400 (EDT) X-Original-Message-ID: <06d901c6e808$73de2ac0$0402a8c0@tednoel> From: "Ted Noel" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] IV/IV-P Main Gear Legs X-Original-Date: Wed, 4 Oct 2006 18:57:22 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_06D6_01C6E7E6.EC76C9A0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_06D6_01C6E7E6.EC76C9A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bob, I haven't done the work you've done, but if you are able to spray a bit = of ACF-50 or Corrosion-X inside the gear leg, you will probably prevent = this corrosion. It has to be repeated annually, but it's cheap = insurance. Ted Noel ----- Original Message -----=20 From: Robert R Pastusek=20 To: Lancair Mailing List=20 Sent: Tuesday, October 03, 2006 10:30 PM Subject: [LML] IV/IV-P Main Gear Legs Builders, My wife says I am often the last person in the world to figure out = what everyone else knows and takes for granted, but I made a "discovery" = this weekend that is probably well known to all but me? Just in case it = isn't, here's the scoop. I attempted to remove the machined aluminum axle mounting brackets = from the lower gear legs of my LIV-P to replace the nylaflow with = braided stainless-covered tubing. Mine is a 1999 era kit, but has never = been parked outside/in the rain as far as I know. Even so, I had to tap = out the two 1/4" retaining bolts with a hammer because corrosion had = built up around the areas where the aluminum axle mount joined the steel = gear leg--my first clue that there might be a problem, and not visible = at all from an outside inspection. The aluminum mount was well corroded = to the gear leg, but I was able to free it by applying penetrating oil = and a heat gun, and using a piece of plastic pipe over the axle to = rotate and loosen the mount on the gear leg.=20 When I got it off, I found that water had penetrated between the steel = gear leg and the aluminum axle mount, and set up some serious corrosion = between these parts. This is a natural path for water to run down the = gear leg in the rain, or during washing. Further, there is no way for = any water to drain out of this area. To correct this, I drilled a "weep = hole" on the inside face of the axle mount about an inch above the = existing brake line fitting. I determined-the actual location by = measuring the depth of the interior clearance hole for the brake line = fitting and transferring this measurement to the outside of the part. I = treated these parts for corrosion resistance, installed my new brake = lines and reassembled, using a bit of clear silicone sealant around the = gear leg/axle mount interface. Has anyone else seen this? It seems to me that any airplane parked out = in the rain is sure to fill these little corrosion reservoirs in short = order. Bob Pastusek ------=_NextPart_000_06D6_01C6E7E6.EC76C9A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bob,
 
I haven't done the work you've done, = but if you are=20 able to spray a bit of ACF-50 or Corrosion-X inside the gear leg, you = will=20 probably prevent this corrosion. It has to be repeated annually, but = it's cheap=20 insurance.
 
Ted Noel
----- Original Message -----
From:=20 Robert R=20 Pastusek
Sent: Tuesday, October 03, 2006 = 10:30=20 PM
Subject: [LML] IV/IV-P Main = Gear=20 Legs

Builders,
 
My wife says I am often the last = person in the=20 world to figure out what = everyone else=20 knows and takes for granted, but I made a "discovery" this weekend = that is=20 probably well known to all but me? Just in case it isn't, here's the=20 scoop.
 
I attempted to remove the machined aluminum = axle=20 mounting brackets from the lower gear legs of my LIV-P to replace the = nylaflow=20 with braided stainless-covered tubing. Mine is a 1999 era kit, but has = never=20 been parked outside/in the rain as far as I know. Even = so, I=20 had to tap out the two 1/4" retaining bolts with a hammer because = corrosion=20 had built up around the areas where the aluminum axle mount joined the = steel=20 gear leg--my first clue that there might be a problem, and not = visible at=20 all from an outside inspection. The aluminum mount was well corroded = to the=20 gear leg, but I was able to free it by applying penetrating oil and a = heat=20 gun, and using a piece of plastic pipe over the axle to rotate and = loosen the=20 mount on the gear leg.
 
When I got it off, I found that water had = penetrated=20 between the steel gear leg and the aluminum axle mount, and set up = some=20 serious corrosion between these parts. This is a natural path for = water to run=20 down the gear leg in the rain, or during washing.  Further, = there is=20 no way for any water to drain out of this area. To correct = this, I=20 drilled a "weep hole" on the inside face of the axle mount about an = inch above=20 the existing brake line fitting. I determined-the actual location by = measuring=20 the depth of the interior clearance hole for the brake line = fitting and=20 transferring this measurement to the outside of the part. I treated = these=20 parts for corrosion resistance, installed my new brake lines and = reassembled,=20 using a bit of clear silicone sealant around the gear leg/axle mount=20 interface.
 
Has anyone else seen this? It seems to me = that any=20 airplane parked out in the rain is sure to fill these little corrosion = reservoirs in short = order.
 
Bob=20 Pastusek
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