X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 06 Dec 2011 08:43:59 -0500 Message-ID: X-Original-Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122] verified) by logan.com (CommuniGate Pro SMTP 5.4.2) with ESMTP id 5293856 for lml@lancaironline.net; Tue, 06 Dec 2011 08:23:13 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.122; envelope-from=super_chipmunk@roadrunner.com X-Original-Return-Path: X-Authority-Analysis: v=2.0 cv=Vf11zSV9 c=1 sm=0 a=bDWlNdx4F44GmdWng05AZg==:17 a=wZBBkgXdLg8A:10 a=zTVDa7HKqxcA:10 a=Ia-xEzejAAAA:8 a=uTiuXo2uCjD80uJhbTkA:9 a=QEXdDO2ut3YA:10 a=EzXvWhQp4_cA:10 a=CjxXgO3LAAAA:8 a=lA_7uS4_SpxZQPZnFWgA:9 a=-cU3Is9KalV40kak6skA:7 a=gKO2Hq4RSVkA:10 a=rC2wZJ5BpNYA:10 a=bDWlNdx4F44GmdWng05AZg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 74.69.215.22 Received: from [74.69.215.22] ([74.69.215.22:53913] helo=WilliamHP) by cdptpa-oedge01.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id CD/29-23309-F171EDE4; Tue, 06 Dec 2011 13:22:40 +0000 X-Original-Message-ID: <3184C505EDFF4A65A87D4A1D3A696E10@WilliamHP> From: "Bill Wade" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [Norton AntiSpam][LML] Re: Legacy vibrations resolved X-Original-Date: Tue, 6 Dec 2011 08:22:37 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A5_01CCB3F0.36A30CC0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3538.513 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3538.513 This is a multi-part message in MIME format. ------=_NextPart_000_00A5_01CCB3F0.36A30CC0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Hi Chris- That=E2=80=99s a bit worrisome. Does Nylon swell when it absorbs = moisture? Shrinkage could cause a double whammy- loosening not only the = pin fit but also the fit of the sleeve in the carbon bore. Your earlier post mentioned a pin diameter of 0.085=E2=80=9D. The = stock pins I measured with my Ebay Chinese calipers showed 0.078-79, so = the 0.083 diameter I settled on improved the fit. In your case that = would result in a looser hinge. It appears that anyone who wanted a = tighter fit might have to experiment with a range of sizes as I did = initially. I accidentally got some Superfil in one of the hinge bores. After = pushing out the resulting plug it measured 0.090 (for reference only- = your results may vary). That might be a way for anyone else to get a = starting measurement for pin sizing. -Bill Wade From: Chris Zavatson=20 Sent: Monday, December 05, 2011 8:58 AM To: lml@lancaironline.net=20 Subject: [Norton AntiSpam][LML] Re: Legacy vibrations resolved ..... =20 Nylon is hydroscopic. This means Nylon absorbs moisture and changes = dimensionally as it does so. In many applications this can be = accommodated, but here a change of just one percent would turn a nice = close fit into a no-fit. Many papers have been devoted to quantifying = the relationship between relative humidity, moisture content and = dimensional part growth. Nylon is not well suited for applications = where dimensional stability is needed. Extra dimensional tolerance must = be allowed in design to accommodate this characteristic. .... ------=_NextPart_000_00A5_01CCB3F0.36A30CC0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Hi Chris-
 
  That=E2=80=99s a bit worrisome. Does Nylon swell when it = absorbs moisture?=20 Shrinkage could cause a double whammy- loosening not only the pin fit = but also=20 the fit of the sleeve in the carbon bore.
 
  Your earlier post mentioned a pin diameter of = 0.085=E2=80=9D. The stock pins=20 I measured with my Ebay Chinese calipers showed 0.078-79, so the 0.083 = diameter=20 I settled on improved the fit. In your case that would result in a = looser hinge.=20 It appears that anyone who wanted a tighter fit might have to experiment = with a=20 range of sizes as I did initially.
 
  I accidentally got some Superfil in one of the hinge bores. = After=20 pushing out the resulting plug it measured 0.090 (for reference only- = your=20 results may vary). That might be a way for anyone else to get a starting = measurement for pin sizing.   -Bill Wade
 
Sent: Monday, December 05, 2011 8:58 AM
Subject: [Norton AntiSpam][LML] Re: Legacy vibrations=20 resolved
 
.....
 
Nylon=20 is hydroscopic.  This = means Nylon=20 absorbs moisture and changes dimensionally as it does so.  In many applications this can = be=20 accommodated, but here a change of just one percent would turn a nice = close fit=20 into a no-fit. Many papers have been devoted to quantifying the = relationship=20 between relative humidity, moisture content and dimensional part = growth.  Nylon is not well suited for=20 applications where dimensional stability is needed.  Extra dimensional tolerance = must be=20 allowed in design to accommodate this characteristic.
  ....
 
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