X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 04 Apr 2012 16:08:27 -0400 Message-ID: X-Original-Return-Path: Received: from imr-ma04.mx.aol.com ([64.12.206.42] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5467354 for lml@lancaironline.net; Tue, 03 Apr 2012 16:40:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.206.42; envelope-from=Sky2high@aol.com Received: from mtaomg-da05.r1000.mx.aol.com (mtaomg-da05.r1000.mx.aol.com [172.29.51.141]) by imr-ma04.mx.aol.com (8.14.1/8.14.1) with ESMTP id q33KdipC031437 for ; Tue, 3 Apr 2012 16:39:45 -0400 Received: from core-mtc005b.r1000.mail.aol.com (core-mtc005.r1000.mail.aol.com [172.29.235.17]) by mtaomg-da05.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 6DBBAE00008E for ; Tue, 3 Apr 2012 16:39:44 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <1835f.e3cdc33.3cacba10@aol.com> X-Original-Date: Tue, 3 Apr 2012 16:39:44 -0400 (EDT) Subject: Re: [LML] Re: engine movement X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_1835f.e3cdc33.3cacba10_boundary" X-Mailer: AOL 9.6 sub 168 X-Originating-IP: [67.175.156.123] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:473235584:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d338d4f7b60107943 --part1_1835f.e3cdc33.3cacba10_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit And adding matching-thickness washers beneath the nut for proper torque.......... No more than three threads showing. Grayhawk In a message dated 4/3/2012 12:41:11 P.M. Central Daylight Time, bu131@swbell.net writes: a good idea is to prop the engine mount by placing 2 large thick washers in the top of the mounts. Gravity will make the engine sag with time and as it does you can easily remove the washers and reestablish a straight line. So arrange the lines with the option of being able to raise the entire mount up in 6-8 months by just removing the washers. Sag is ever-present. ak ____________________________________ From: Charles Brown To: lml@lancaironline.net Sent: Tuesday, April 3, 2012 9:21 AM Subject: [LML] Re: engine movement Paul, great shot, thanks. My engine, at 110 hr total time, is now (at rest) flush with the cowl; it started out 1/4" high so has sagged 1/4 inch in 6mo/110 hours. Also, it's now Bug Season in Texas and I have observed bugs on the upper cowl behind the spinner to a depth of about 3/8" (and none on the lower cowl). So I conclude that flight loads pull my spinner down about 3/8". The mounts are standard-issue, whatever that is (I got the firewall forward fast build) -- look like basic big ol Lord mounts. But I'm going to shim them and try to de-sag things. On Apr 2, 2012, at 1:59 PM, Paul Miller wrote: This photo demonstrates how much the engine pulls down (and also to the left) relative to the cowl during normal operation in the Legacy. This was from a photo shoot at normal power. At rest, the spinner is flush with the cowl so I estimate at least an inch drop. This corresponds to what I'm finding with interference on the lower cowl but it is at least an inch away when I remove the cowl for inspection. My plan is to shim up the mount at the front two isolators. These are relatively new Berry mounts, no shims installed. All of the hard hits I previously had on the upper cowl are now removed. I use a white primer between flights inside the upper cowl to provide witness marks and the most recent flights have shown no interference. However, I still get interference during flight at cruise RPMs that I am starting to identify on the lower cowl. Hopefully, those are the last. Tight cowling + twisting engines = lot of work. Paul Legacy RG Spruce Creek <_BJV1340c.jpeg>-- For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html -- For archives and unsub _http://mail.lancaironline.net:81/lists/lml/List.html_ (http://mail.lancaironline.net:81/lists/lml/List.html) --part1_1835f.e3cdc33.3cacba10_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
And adding matching-thickness washers beneath the nut for proper=20 torque.......... No more than three threads showing.
 
Grayhawk
 
In a message dated 4/3/2012 12:41:11 P.M. Central Daylight Time,=20 bu131@swbell.net writes:
=
a good idea is to prop the engine mount by placing 2 large thi= ck=20 washers in the top of the mounts. Gravity will make the engine sag with t= ime=20 and as it does you can easily remove the washers and reestablish a straig= ht=20 line. So arrange the lines with the option of being able to raise the ent= ire=20 mount up in 6-8 months by just removing the washers. Sag is=20 ever-present.

ak

From: Charles Brown=20 <browncc1@verizon.net>
To: lml@lancaironline.net
<= SPAN=20 style=3D"FONT-WEIGHT: bold">Sent: Tuesday, April 3, 2012 9:21= =20 AM
Subject: [LML] Re: = engine=20 movement

Paul, great shot, thanks.  My engine, a= t 110=20 hr total time, is now (at rest) flush with the cowl; it started out 1/4" = high=20 so has sagged 1/4 inch in 6mo/110 hours.  Also, it's now Bug Season = in=20 Texas and I have observed bugs on the upper cowl behind the spinner to a = depth=20 of about 3/8" (and none on the lower cowl).  So I conclude that flig= ht=20 loads pull my spinner down about 3/8".  The mounts are standard-issu= e,=20 whatever that is (I got the firewall forward fast build) -- look like bas= ic=20 big ol Lord mounts.  But I'm going to shim them and try to de-sag=20 things.


On Apr 2, 2012, at 1:59 PM, Paul Miller wrote:

= This=20 photo demonstrates how much the engine pulls down (and also to the left)= =20 relative to the cowl during normal operation in the Legacy.  This wa= s=20 from a photo shoot at normal power.  At rest, the spinner is flush w= ith=20 the cowl so I estimate at least an inch drop.  This corresponds to w= hat=20 I'm finding with interference on the lower cowl but it is at least an inc= h=20 away when I remove the cowl for inspection.  My plan is to shim up t= he=20 mount at the front two isolators.  These are relatively new Berry mo= unts,=20 no shims installed. All of the hard hits I previously had on the upper co= wl=20 are now removed.  I use a white primer between flights inside the up= per=20 cowl to provide witness marks and the most recent flights have shown no= =20 interference.  However, I still get interference during flight at cr= uise=20 RPMs that I am starting to identify on the lower cowl.  Hopefully, t= hose=20 are the last.  Tight cowling + twisting engines =3D lot of=20 work.

Paul
Legacy RG Spruce=20 Creek

<_BJV1340c.jpeg><spinnder_drop.jpeg>--
For=20 archives and unsub=20 http://mail.lancaironline.net:81/lists/lml/List.html


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