X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 50 [XX] Return-Path: Sender: To: lml Date: Wed, 03 Jan 2007 15:27:37 -0500 Message-ID: X-Original-Return-Path: Received: from smtp4.na.baesystems.com ([63.164.202.13] verified) by logan.com (CommuniGate Pro SMTP 5.1.4) with ESMTP id 1732971 for lml@lancaironline.net; Wed, 03 Jan 2007 10:50:52 -0500 Received-SPF: none receiver=logan.com; client-ip=63.164.202.13; envelope-from=christopher.zavatson@baesystems.com Received: from BLUMS0022.bluelnk.net (blums0022.na.baesystems.com [10.40.96.145]) by smtp4.na.baesystems.com (8.13.6/8.13.6) with ESMTP id l03Fnswe002592 for ; Wed, 3 Jan 2007 10:49:54 -0500 (EST) Received: from GLDMS00005.goldlnk.rootlnka.net ([10.44.64.11]) by smtp1.na.baesystems.com (8.13.6/8.13.6) with ESMTP id l03FnjBO018907 for ; Wed, 3 Jan 2007 10:49:53 -0500 (EST) Received: from gldms10602.goldlnk.rootlnka.net ([10.64.39.19]) by GLDMS00005.goldlnk.rootlnka.net with Microsoft SMTPSVC(6.0.3790.1830); Wed, 3 Jan 2007 10:49:45 -0500 Received: from GLDMS10607.goldlnk.rootlnka.net ([10.64.39.20]) by gldms10602.goldlnk.rootlnka.net with Microsoft SMTPSVC(6.0.3790.1830); Wed, 3 Jan 2007 07:49:45 -0800 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C72F4E.C9AE8B1B" Subject: RE: [LML] Re: Nose strut inspections - all models X-Original-Date: Wed, 3 Jan 2007 07:49:44 -0800 X-Original-Message-ID: In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] Re: Nose strut inspections - all models Thread-Index: AccvSbdtv8riBLvjSG2AMwUTkh3wGAAAGjEQ From: "Zavatson, Christopher J \(US SSA\)" X-Original-To: "Lancair Mailing List" X-OriginalArrivalTime: 03 Jan 2007 15:49:45.0075 (UTC) FILETIME=[CA43E430:01C72F4E] This is a multi-part message in MIME format. ------_=_NextPart_001_01C72F4E.C9AE8B1B Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Mike, That is interesting news - Is the new model made by someone other than ESCO? Has the fundamental design changed? There are a number of ways to increase the damping in the current models if it is needed. I like the idea of a second o-ring. =20 The grease plate test is another one that is probably not done as often as needed. Prior to the self centering modification, one only needed to raise the nose gear off the ground to check the damping. This check is particularly important for new installations. After a rebuild it can take 30+ full cycles from stop to stop to work out all the air and dead spots. Worn internal parts can also result in dead spots without damping. Does the SB you mention specify a minimum torque at some angular velocity to use as a pass/fail criteria? I have checked a number of struts on flying planes over the years and have found a wide range in damping. Of course I could not tell the owners how much damping force is enough damping force. Chris =20 =20 =20 =20 Chris Zavatson N91CZ 360std www.N91CZ.com ------_=_NextPart_001_01C72F4E.C9AE8B1B Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Mike,

That is interesting news - Is the = new model made by someone other than ESCO? Has the fundamental design changed? There are a number of ways to increase the damping in the current models if it is needed. I like the idea of a second = o-ring.

The grease plate test is another = one that is probably not done as often as needed. Prior to the self centering modification, one only needed to raise the nose gear off the ground to = check the damping. This check is particularly important for new installations. After a rebuild it can take 30+ full cycles from = stop to stop to work out all the air and dead spots. Worn internal parts = can also result in dead spots without damping. Does the SB you mention = specify a minimum torque at some angular velocity to use as a pass/fail = criteria? I have checked a number of struts on flying planes over the years and have = found a wide range in damping. Of course I could not tell the owners how = much damping force is enough damping force.

Chris

Chris = Zavatson

N91CZ

360std

www.N91CZ.com

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