Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Fri, 01 Apr 2005 07:13:30 -0500 Message-ID: X-Original-Return-Path: Received: from sccrmhc12.comcast.net ([204.127.202.56] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP id 851224 for lml@lancaironline.net; Fri, 01 Apr 2005 01:43:20 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.202.56; envelope-from=rbelshe@comcast.net Received: from desk (c-24-4-108-65.client.comcast.net[24.4.108.65]) by comcast.net (sccrmhc12) with SMTP id <2005040106423301200pe8kbe>; Fri, 1 Apr 2005 06:42:33 +0000 From: "Bob B." X-Original-To: "'Lancair Mailing List'" Subject: RE: [LML] nose gear door X-Original-Date: Thu, 31 Mar 2005 22:43:46 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0079_01C53643.1986A390" X-Mailer: Microsoft Office Outlook, Build 11.0.6353 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1478 thread-index: AcU1NfDV43DV8HTxS8+ciKkTKikJEABTsgeQ X-Original-Message-ID: This is a multi-part message in MIME format. ------=_NextPart_000_0079_01C53643.1986A390 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Gerard, you should also check your engine mount. When my 235 was nearly new (1995), it developed severe nose wheel shimmy on roll out. The strut was sent back to Esco for a anti shimmy mod. Unless your strut is very old, it probably already has this mod. In addition, the short cross piece above the strut pivot points on the engine mount was found to be cracked at both ends. I had a new cross piece of thicker-walled tubing welded in the mount and now have over 500 hours on the plane with no shimmy. Bob Belshe Moraga, CA Lancair 235/320 http://home.comcast.net/~rbelshe/ _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Gerard O Connell Sent: Wednesday, March 30, 2005 6:37 AM To: Lancair Mailing List Subject: [LML] nose gear door Scott, thank you for your response.I ha passed on your sugestions to thelocal mechanics. Vern also feels it is most likely a sequence valve issue. Replacing the valve seemed to temporarily correct the problem but this was short lived. It has also been suggested by an Australian builder that perhaps the nose wheel precesses slightly with gyroscopic force during retraction and thus is at a slight angle different to when on the ground and thus does not depress the valve. I don't have the self centering nose wheel mod. The suggestion was to check the bearings for wear + play in the nose wheel. On landing, I have noticed some "judder" or shimmy during my roll out. This would be consistent with worn bearings would it not? The judder was improved a little by a new drag link but has far from disappeared altogether. ------=_NextPart_000_0079_01C53643.1986A390 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Gerard, you should also check your engine=20 mount.   When my 235 was nearly new (1995), it developed = severe nose=20 wheel shimmy on roll out.  The strut was sent back to Esco for a = anti=20 shimmy mod.  Unless your strut is very old, it probably already has = this=20 mod.  In addition, the short cross piece above the strut pivot = points=20 on the engine mount was found to be cracked at both ends.  I had a = new=20 cross piece of thicker-walled tubing welded in the mount and now have = over 500=20 hours on the plane with no shimmy.

Bob Belshe
Moraga, CA
Lancair = 235/320  
http://home.comcast.net/~rbels= he/=20

From: Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of Gerard O=20 Connell
Sent: Wednesday, March 30, 2005 6:37 = AM
To:=20 Lancair Mailing List
Subject: [LML] nose gear=20 door

Scott, thank you for your = response.I ha=20 passed on your sugestions to thelocal mechanics. Vern also feels it is = most=20 likely a sequence valve issue. Replacing the valve seemed to = temporarily=20 correct the problem but this was short lived. It has also been = suggested by an=20 Australian builder that perhaps the nose wheel precesses slightly with = gyroscopic force during retraction and thus is at a slight angle = different to=20 when on the ground and thus does not depress the valve. I don't have = the self=20 centering nose wheel mod. The suggestion was to check the bearings for = wear +=20 play in the nose wheel. On landing, I have noticed some "judder" = or=20 shimmy during my roll out. This would be consistent with worn bearings = would=20 it not? The judder was improved a little by a new drag link but has = far=20 from
disappeared altogether.
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