X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 26 Jan 2013 02:07:10 -0500 Message-ID: X-Original-Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTP id 6030076 for lml@lancaironline.net; Fri, 25 Jan 2013 20:48:45 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=dfs155@roadrunner.com X-Original-Return-Path: X-Authority-Analysis: v=2.0 cv=XL2yuHdE c=1 sm=0 a=Ja3ah/0JYLvMDbBKcVq7Tw==:17 a=GanWbjEHyNIA:10 a=C7XmVBkZaykA:10 a=zTVDa7HKqxcA:10 a=8nJEP1OIZ-IA:10 a=doupyKFmAAAA:8 a=aAIFD3YWN4YA:10 a=BZVJPiVPcH3YeV63RHEA:9 a=wPNLvfGTeEIA:10 a=Ja3ah/0JYLvMDbBKcVq7Tw==:117 X-Cloudmark-Score: 0 X-Authenticated-User: X-Originating-IP: 76.178.22.229 Received: from [76.178.22.229] ([76.178.22.229:2255] helo=dan) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id B8/27-25887-CD533015; Sat, 26 Jan 2013 01:48:12 +0000 X-Original-Message-ID: From: "Dan Schaefer" X-Original-To: "Lancair list" Subject: Re: [LML] Re: Max Gross 360 LNC2 X-Original-Date: Fri, 25 Jan 2013 17:48:16 -0800 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Grayhawk is right regarding the failure mode of the original LNC2 over-center links. In about '93, I was flight testing my 235 and a hangar-mate had the first failure (that we knew of) on take-off at Sedona while on his way to Oshkosh. When he got the wreck home (on a truck), examination of the failed over-center link clearly showed that the riveted-in threaded rod-end (AN490 type) had failed (separated) because very little of the steel insert remained after drilling thru for the rivet. The rod-end had to be inserted in the link with a structural epoxy and drilled thru - so when the rivet hole was drilled, the rod-end could not be removed for inspection - the rivet hole had to be centered exactly for maximum strength but you just had to take your accuracy on faith. Needless to say, I immediately grounded my 235 (with the same design) and had a local machinist make a steel replacement for the link with a threaded bore. I replaced the non-treaded rod-ends with internally threaded units and connected the links and rod-ends with a length of threaded stainless all-thread. I had 10 sets made and they were sold to other LNC2 owners in a week. Within a month or so, the factory came out with an essentially identical version - with the advice that the old links be replaced. Grayhawk tickled the old memory, so I bring all this up to alert anybody flying an early LNC2 to make the change. The old links are a weak point and if you've still got 'em, the next landing (or take-off) with a unusual lateral load (cross-wind or whatever) could be quite costly. Dan Schaefer