X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 08 Jan 2012 20:50:54 -0500 Message-ID: X-Original-Return-Path: Received: from p3plex1out02.prod.phx3.secureserver.net ([72.167.180.18] verified) by logan.com (CommuniGate Pro SMTP 5.4.3) with SMTP id 5340298 for lml@lancaironline.net; Fri, 06 Jan 2012 13:46:29 -0500 Received-SPF: none receiver=logan.com; client-ip=72.167.180.18; envelope-from=pete@leapfrogventures.com Received: (qmail 7103 invoked from network); 6 Jan 2012 18:45:51 -0000 Received: from unknown (HELO smtp.ex1.secureserver.net) (72.167.180.46) by p3plex1out02.prod.phx3.secureserver.net with SMTP; 6 Jan 2012 18:45:51 -0000 Received: from P3PW5EX1MB14.EX1.SECURESERVER.NET ([10.6.135.86]) by P3PW5EX1HT004.EX1.SECURESERVER.NET ([72.167.180.134]) with mapi; Fri, 6 Jan 2012 11:45:37 -0700 From: "pete@leapfrogventures.com" X-Original-To: Paul Bricker , "lml@lancaironline.net" X-Original-Date: Fri, 6 Jan 2012 11:45:36 -0700 Subject: RE: [LML] Gear shimmy Thread-Topic: [LML] Gear shimmy Thread-Index: AczMYmOMRJXuO2UBQk2PdKlyBq+VVwAPV9bw X-Original-Message-ID: <2A14E6258A8534418F5498D73CCA51EFA91EC616@P3PW5EX1MB14.EX1.SECURESERVER.NET> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_2A14E6258A8534418F5498D73CCA51EFA91EC616P3PW5EX1MB14EX1_" MIME-Version: 1.0 --_000_2A14E6258A8534418F5498D73CCA51EFA91EC616P3PW5EX1MB14EX1_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Paul, Thanks for the feedback. I do have the Lancair casting for jacking the pla= ne, which is great for changing tires and brakes, but it does not help for = checking whether the gear leg is loose in the upper socket. I borrowed a w= ing jack and a carpeted 12" square pad from my local mechanic and was able = to get the gear off of the ground. The legs seemed as tight as they were w= hen first installed. Note that I have had absolutely no shimmy for the first 250 hours I have fl= own the plane. It just showed up a month or so ago. Maybe a brake issue?= I don't feel it on initial roll-out, just as I slow between 40 to 20 knot= s. I'll do a search on the other forum. Again, thanks for the assistance. Pete From: Paul Bricker [mailto:pbricker@att.net] Sent: Thursday, January 05, 2012 10:59 AM To: lml@lancaironline.net Subject: Re: [LML] Gear shimmy Pete, First with the easy question. There is a casting you can buy from Lancair p= arts that "clips" around the lower end of the gear leg and provides a jack = point for a floor jack. You'll also want this during condition inspections = when you remove the wheels to repack the bearings. If you can't get one fro= m Redmond let me know off list. I may know where an 'extra" is. The shimmy question has been explored, investigated, experimented on, photo= graphed, argued over, and generally beaten by many on this list. Main gear = leg movement is one of what, by my count, appears to be 3 possible causes. = The others are loss of damping in the strut, and movement in the mount betw= een the strut and the motor mount. I'm sure other people will soon jump in = with all the other causes I've forgotten. I recommend joining the [Lancair_ES] list. Their archives should have more = details on this ES issue. There are many who have worked this problem dilig= ently who monitor this list, so standby for more advise. Paul Bricker pbricker@att.net From: "pete@leapfrogventures.com" > Reply-To: Lancair Mailing List > Date: Wed, 04 Jan 2012 16:38:21 -0500 To: > Subject: [LML] Gear shimmy After 250 shimmy free hours, I am now getting gear shimmy when my ES-P slow= s down through about 30 knots. I think I recall folks saying this is due t= o looseness in the upper main gear leg sockets. Is this correct, or is the= re another cause? My strut (new version) looks fine. If it is loose main gear, how do you suggest that I get the main gear off o= f the ground? There are no obvious jack points. Thanks for the advice! Pete --_000_2A14E6258A8534418F5498D73CCA51EFA91EC616P3PW5EX1MB14EX1_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Paul,

 

Thanks for the feedback.  I do have the Lancair casti= ng for jacking the plane, which is great for changing tires and brakes, but= it does not help for checking whether the gear leg is loose in the upper s= ocket.  I borrowed a wing jack and a carpeted 12” square pad fro= m my local mechanic and was able to get the gear off of the ground.  T= he legs seemed as tight as they were when first installed.

 

Note that I have ha= d absolutely no shimmy for the first 250 hours I have flown the plane. = ; It just showed up a month or so ago.   Maybe a brake issue?&nbs= p; I don’t feel it on initial roll-out, just as I slow between 40 to = 20 knots.

 

I’ll do a search on the other forum.  Again, thanks for t= he assistance.

 

Pete

 

From: Paul Bricker [mailto:pbricker@att.net]
= Sent: Thursday, January 05, 2012 10:59 AM
To: lml@lancaironli= ne.net
Subject: Re: [LML] Gear shimmy

=

 

<= span style=3D'font-size:10.5pt;font-family:"Arial","sans-serif";color:black= '>Pete,

First with = the easy question. There is a casting you can buy from Lancair parts that &= quot;clips" around the lower end of the gear leg and provides a jack p= oint for a floor jack. You'll also want this during condition inspections w= hen you remove the wheels to repack the bearings. If you can't get one from= Redmond let me know off list. I may know where an 'extra" is.

 

The shimmy question has been explored,= investigated, experimented on, photographed, argued over, and generally be= aten by many on this list. Main gear leg movement is one of what, by my cou= nt, appears to be 3 possible causes. The others are loss of damping in the = strut, and movement in the mount between the strut and the motor mount. I'm= sure other people will soon jump in with all the other causes I've forgott= en. 

&nb= sp;

I recommend joining = the [Lancair_ES] list. Their archives should have more details on this ES i= ssue. There are many who have worked this problem diligently who monitor th= is list, so standby for more advise.

 

Paul Bricker

 

From: = "pete@leapfrogventures.com" <pete@leapfrogventures.com>
Reply-To: Lancair= Mailing List <lml@lancaironlin= e.net>
Date: Wed, 04 Jan 2012 16:38:21 -0500
To: <lml@lancaironline.net>=
Subject: [LML] Gear shimmy

 

After 250 shimmy free hours, I am now getting gear shimmy whe= n my ES-P slows down through about 30 knots.  I think I recall folks s= aying this is due to looseness in the upper main gear leg sockets.  Is= this correct, or is there another cause?  My strut (new version) look= s fine.

 

If it is loose main gear, how do you suggest that I get the main gear = off of the ground?  There are no obvious jack points.

 

Thanks for the advi= ce!

&= nbsp;

Pete

= --_000_2A14E6258A8534418F5498D73CCA51EFA91EC616P3PW5EX1MB14EX1_--