X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 01 Aug 2008 13:07:12 -0400 Message-ID: X-Original-Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.2.5) with ESMTP id 3050670 for lml@lancaironline.net; Thu, 31 Jul 2008 21:27:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.115.11.52; envelope-from=paulhershorin@bellsouth.net Received: from fwebmail33.isp.att.net ([204.127.221.133]) by isp.att.net (frfwmhc02) with SMTP id <20080801012637H020012iq3e>; Fri, 1 Aug 2008 01:26:37 +0000 X-Originating-IP: [204.127.221.133] Received: from [74.233.177.12] by fwebmail33.isp.att.net; Fri, 01 Aug 2008 01:26:36 +0000 From: paulhershorin@bellsouth.net X-Original-To: "Lancair Mailing List" Subject: Re: [LML] Re: LNC2 Vibration X-Original-Date: Fri, 01 Aug 2008 01:26:36 +0000 X-Original-Message-Id: <080120080126.12987.4892664C0005BF31000032BB22243323629B0A02D2089B9A019C04040A0DBF02079D01089C9D0A08049A0E9F@att.net> In-Reply-To: X-Mailer: AT&T Message Center Version 1 (Jul 16 2008) X-Authenticated-Sender: cGF1bGhlcnNob3JpbkBiZWxsc291dGgubmV0 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_12987_1217553996_0" --NextPart_Webmail_9m3u9jl4l_12987_1217553996_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit It could be a broken cord in a tire. Paul Hershorin 360 471LA -------------- Original message from "Mark Ravinski" : -------------- > Try spinning the wheels ( on jacks ) just to see if they wobble. > Then dismount the tires and tubes and inspect, remount. > It sounds like nosewheel shimmy also. Make sure you have good shimmy > dampening in the strut and tight nosewheel bearings. Then change the > nosewheel tire and tube if the problem persists. > > Mark Ravinski > 360 1443 hrs > > > ----- Original Message ----- > From: "Tom McNerney" > To: > Sent: Thursday, July 31, 2008 3:26 PM > Subject: [LML] LNC2 Vibration > > > Before I go and over engineer a problem, I thought I would get every ones > expert advice first. It clearly has worked well for me in the past. (Thanks > Grayhawk) > > I have what feels to be a classic case of warped rotors, but that isn't it. > About the last half of the roll out I start to get a vibration from the > right main gear. Or at least I think it is the right side. Thinking it was > an easy fix I replaced the rotors with a new set. I think it is better, but > that could be just in my head. The vibration is much worse under braking, > but does exist while just rolling. As most vibrations, it seems to have a > peak intensity at a certain speed. 30-50 mph I would guess. This has the > original rubber cushion landing gear. > > So, here are my ideas.. > > Bad tire that is out of balance? Waaay out of balance. They are Chang Shin > tires, so maybe I got what I paid for. haha > > Out of Alignment? This aircraft has had the service bulletin completed > regarding the main gear reinforcement. Could this have caused an alignment > issue? > > Nature of the beast? It has had this problem from the day I purchased it, so > maybe it is just me. Although I hope not! > > Would love to hear some ideas or past experience with this. > > Thank a ton! > Tom McNerney > N54SG > > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html > > > > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html --NextPart_Webmail_9m3u9jl4l_12987_1217553996_0 Content-Type: multipart/related; boundary="NextPart_Webmail_9m3u9jl4l_12987_1217553996_1" --NextPart_Webmail_9m3u9jl4l_12987_1217553996_1 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
It could be a broken cord in a tire.
Paul Hershorin
360  471LA
-------------- Original message from "Mark Ravinski" <mjr= av@comcast.net>: --------------


> Try spinning the wheels= ( on jacks ) just to see if they wobble.
> Then dismount the tires = and tubes and inspect, remount.
> It sounds like nosewheel shimmy al= so. Make sure you have good shimmy
> dampening in the strut and tigh= t nosewheel bearings. Then change the
> nosewheel tire and tube if t= he problem persists.
>
> Mark Ravinski
> 360 1443 hrs =
>
>
> ----- Original Message -----
> From: "Tom= McNerney"
> To:
= > Sent: Thursday, July 31, 2008 3:26 PM
> Subject: [LML] LNC2 Vib= ration
>
>
> Before I go and over engineer a problem, = I thought I would get every ones
> expert advice first. It clearly h= as worked well for me in the past. (Thanks
> Grayhawk)
>
= > I have what feels to be a classic case of warped rotors, but that isn'= t it.
> About the last half of the roll out I start to get a vibrati= on from the
> right main gear. Or at least I think it is the right s= ide. Thinking it was
> an easy fix I replaced the rotors with a new = set. I think it is better, but
> that could be just in my head. The = vibration is much worse under braking,
> but does exist while just r= olling. As most vibrations, it seems to have a
> peak intensity at a= certain speed. 30-50 mph I would guess. This has the
> original rub= ber cushion landing gear.
>
> So, here are my ideas..
>= ;
> Bad tire that is out of balance? Waaay out of balance. They are = Chang Shin
> tires, so maybe I got what I paid for. haha
> > Out of Alignment? This aircraft has had the service bulletin complet= ed
> regarding the main gear reinforcement. Could this have caused a= n alignment
> issue?
>
> Nature of the beast? It has h= ad this problem from the day I purchased it, so
> maybe it is just m= e. Although I hope not!
>
> Would love to hear some ideas or = past experience with this.
>
> Thank a ton!
> Tom McNe= rney
> N54SG
>
> --
> For archives and unsub ht= tp://mail.lancaironline.net:81/lists/lml/List.html
>
>
&g= t;
> --
> For archives and unsub http://mail.lancaironline.ne= t:81/lists/lml/List.html
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