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Date: Tue, 03 Apr 2012 13:28:57 -0400
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From: Dr Andres Katz <bu131@swbell.net>
Reply-To: Dr Andres Katz <bu131@swbell.net>
Subject: Re: [LML] Re: engine movement
In-Reply-To: <list-5466698@logan.com>
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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 i=
t does you can easily remove the washers and reestablish a straight line. S=
o 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.=0A=0Aa=
k=0A=0A=0A________________________________=0A From: Charles Brown <browncc1=
@verizon.net>=0ATo: lml@lancaironline.net =0ASent: Tuesday, April 3, 2012 9=
:21 AM=0ASubject: [LML] Re: engine movement=0A =0APaul, great shot, thanks.=
=A0 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.=A0 Also, =
it's now Bug Season in Texas and I have observed bugs on the upper cowl beh=
ind the spinner to a depth of about 3/8" (and none on the lower cowl).=A0 S=
o I conclude that flight loads pull my spinner down about 3/8".=A0 The moun=
ts are standard-issue, whatever that is (I got the firewall forward fast bu=
ild) -- look like basic big ol Lord mounts.=A0 But I'm going to shim them a=
nd try to de-sag things.=0A=0A=0AOn Apr 2, 2012, at 1:59 PM, Paul Miller wr=
ote:=0A=0AThis photo demonstrates how much the engine pulls down (and also =
to the left) relative to the cowl during normal operation in the Legacy.=A0=
 This was from a photo shoot at normal power.=A0  At rest, the spinner is f=
lush with the cowl so I estimate at least an inch drop.=A0 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.=A0  My plan is to shim=
 up the mount at the front two isolators.=A0 These are relatively new Berry=
 mounts, no shims installed. All of the hard hits I previously had on the u=
pper cowl are now removed.=A0 I use a white primer between flights inside t=
he upper cowl to provide witness marks and the most recent flights have sho=
wn no interference.=A0  However, I still get interference during flight at =
cruise RPMs that I am starting to identify on the lower cowl.=A0 Hopefully,=
 those are the last.=A0  Tight cowling + twisting engines =3D lot of work.=
=0A=0APaul=0ALegacy RG Spruce Creek=0A=0A<_BJV1340c.jpeg><spinnder_drop.jpe=
g>--=0AFor archives and unsub http://mail.lancaironline.net:81/lists/lml/Li=
st.html=0A=0A=0A--=0AFor archives and unsub http://mail.lancaironline.net:8=
1/lists/lml/List.html
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:bo=
okman old style, new york, times, serif;font-size:12pt"><div><span>a good i=
dea 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 y=
ou can easily remove the washers and reestablish a straight line. So arrang=
e 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.</span></div><d=
iv><span><br></span></div><div><span>ak</span></div><div><br></div>  <div s=
tyle=3D"font-size: 12pt; font-family: 'bookman old style', 'new york', time=
s, serif; "> <div style=3D"font-size: 12pt; font-family: 'times new roman',=
 'new york', times, serif; "> <div dir=3D"ltr"> <font size=3D"2" face=3D"Ar=
ial"> <hr size=3D"1">  <b><span style=3D"font-weight:bold;">From:</span></b=
> Charles Brown &lt;browncc1@verizon.net&gt;<br> <b><span style=3D"font-wei=
ght:
 bold;">To:</span></b> lml@lancaironline.net <br> <b><span style=3D"font-we=
ight: bold;">Sent:</span></b> Tuesday, April 3, 2012 9:21 AM<br> <b><span s=
tyle=3D"font-weight: bold;">Subject:</span></b> [LML] Re: engine movement<b=
r> </font> </div> <br>=0APaul, great shot, thanks.&nbsp; My engine, at 110 =
hr total time, is now (at rest) flush with the cowl; it started out 1/4" hi=
gh so has sagged 1/4 inch in 6mo/110 hours.&nbsp; 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).&nbsp; So I conclude tha=
t flight loads pull my spinner down about 3/8".&nbsp; The mounts are standa=
rd-issue, whatever that is (I got the firewall forward fast build) -- look =
like basic big ol Lord mounts.&nbsp; But I'm going to shim them and try to =
de-sag things.<br><br><br>On Apr 2, 2012, at 1:59 PM, Paul Miller wrote:<br=
><br>This photo demonstrates how much the engine pulls down (and also to th=
e left) relative to the cowl during normal operation in the Legacy.&nbsp; T=
his was from a photo shoot at normal power.&nbsp;  At rest, the spinner is =
flush with the cowl so I estimate at least an inch drop.&nbsp; This corresp=
onds to what I'm
 finding with interference on the lower cowl but it is at least an inch awa=
y when I remove the cowl for inspection.&nbsp;  My plan is to shim up the m=
ount at the front two isolators.&nbsp; These are relatively new Berry mount=
s, no shims installed. All of the hard hits I previously had on the upper c=
owl are now removed.&nbsp; I use a white primer between flights inside the =
upper cowl to provide witness marks and the most recent flights have shown =
no interference.&nbsp;  However, I still get interference during flight at =
cruise RPMs that I am starting to identify on the lower cowl.&nbsp; Hopeful=
ly, those are the last.&nbsp;  Tight cowling + twisting engines =3D lot of =
work.<br><br>Paul<br>Legacy RG Spruce Creek<br><br>&lt;_BJV1340c.jpeg&gt;&l=
t;spinnder_drop.jpeg&gt;--<br>For archives and unsub http://mail.lancaironl=
ine.net:81/lists/lml/List.html<br><br><br>--<br>For archives and unsub <a h=
ref=3D"http://mail.lancaironline.net:81/lists/lml/List.html"
 target=3D"_blank">http://mail.lancaironline.net:81/lists/lml/List.html</a>=
<br><br><br> </div> </div>  </div></body></html>
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