X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 03 Aug 2011 11:10:56 -0400 Message-ID: X-Original-Return-Path: Received: from mail-pz0-f50.google.com ([209.85.210.50] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTPS id 5071949 for lml@lancaironline.net; Tue, 02 Aug 2011 16:26:06 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.50; envelope-from=joeczabaranek@gmail.com Received: by pzk2 with SMTP id 2so230072pzk.9 for ; Tue, 02 Aug 2011 13:25:29 -0700 (PDT) Received: by 10.68.44.197 with SMTP id g5mr5092279pbm.90.1312316729244; Tue, 02 Aug 2011 13:25:29 -0700 (PDT) X-Original-Return-Path: Received: from [10.235.34.109] (134.sub-174-254-4.myvzw.com [174.254.4.134]) by mx.google.com with ESMTPS id d1sm183950pbj.8.2011.08.02.13.25.26 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 02 Aug 2011 13:25:28 -0700 (PDT) References: In-Reply-To: Mime-Version: 1.0 (iPhone Mail 8E200) Content-Transfer-Encoding: 7bit Content-Type: multipart/alternative; boundary=Apple-Mail-1--997924133 X-Original-Message-Id: <22D0DBCF-5336-42DE-ACE2-6969DB296105@gmail.com> X-Original-Cc: "lml@lancaironline.net" X-Mailer: iPhone Mail (8E200) From: Joseph Czabaranek Subject: Re: [LML] Re: Moving Legacy on the Crankshaft X-Original-Date: Tue, 2 Aug 2011 13:25:20 -0700 X-Original-To: Lancair Mailing List --Apple-Mail-1--997924133 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii The builder of my lnc2 used the lift point on the engine block to lift the p= lane several times. There is a bolt on the split line of the case that came= with a u shaped bracket for hoisting the motor. The bracket is normally re= moved after installation. He just left it where it was. He used the tail a= s the other jack point. =20 Sent from my iPhone On Aug 2, 2011, at 12:17 PM, rwolf99@aol.com wrote: > One poster suggested that nothing firewall forward is rated to take the we= ight of the airplane while rolling it from teh front yard to the back yard o= n the rotisserie. This is actually not correct. The engine mount and firew= all should be sized for the weight of the engine at the maximum G limits of t= he airplane, acting at the CG of the engine/prop. I would not be worried ab= out the bending moment on the engine mount or firewall, but I would have to r= un the numbers to make sure. > =20 > On the other hand, putting a huge bending/shear load into the crankshaft s= cares the crap out of me. Call the engineering department of your engine ma= nufacturer and tell them what you propose and ask what they think. When the= y regain consciousness they will probably have many colorful words to sugges= t that it's a bad idea. However, I'm just speculating since I have not run t= hse numbers either. > =20 > I appreciate your plight, but it would be better to find another way. > =20 > - Rob Wolf --Apple-Mail-1--997924133 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8

The builder of my lnc2 used the lift point on the engine block to lift the plane several times. There is a bolt on the split line of the case that came with a u shaped bracket for hoisting the motor. The bracket is normally removed after installation. He just left it where it was. He used the tail as the other jack point.

Sent from my iPhone

On Aug 2, 2011, at 12:17 PM, rwolf99@aol.com wrote:

One poster suggested that nothing firewall forward is rated to take the weight of the airplane while rolling it from teh front yard to the back yard on the rotisserie. This is actually not correct. The engine mount and firewall should be sized for the weight of the engine at the maximum G limits of the airplane, acting at the CG of the engine/prop. I would not be worried about the bending moment on the engine mount or firewall, but I would have to run the numbers to make sure.

On the other hand, putting a huge bending/shear load into the crankshaft scares the crap out of me. Call the engineering department of your engine manufacturer and tell them what you propose and ask what they think. When they regain consciousness they will probably have many colorful words to suggest that it's a bad idea. However, I'm just speculating since I have not run thse numbers either.

I appreciate your plight, but it would be better to find another way.

- Rob Wolf

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