X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Mon, 02 Oct 2006 11:24:45 -0400 Message-ID: X-Original-Return-Path: Received: from [70.62.14.124] (HELO server1.USTEK) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1429653 for lml@lancaironline.net; Mon, 02 Oct 2006 09:12:32 -0400 Received-SPF: none receiver=logan.com; client-ip=70.62.14.124; envelope-from=rsimon@ustek.com MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C6E624.8444208A" Subject: RE: [LML] DuPont Corlar, BASF R-M Undercoat DP25, and SP-008A-PT Silver Plate Coper Coating Content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Date: Mon, 2 Oct 2006 09:13:13 -0400 X-Original-Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML] DuPont Corlar, BASF R-M Undercoat DP25, and SP-008A-PT Silver Plate Coper Coating Thread-Index: Acbl08l9pnaOds7CR++Uozg3GP9wtwATnNaA From: "Lancair" X-Original-Sender: "Robert Simon" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C6E624.8444208A Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John Hafen Sent: Sunday, October 01, 2006 11:34 PM To: Lancair Mailing List Subject: [LML] DuPont Corlar, BASF R-M Undercoat DP25, and SP-008A-PT Silver Plate Coper Coating The highly conductive ground plane is of marginal use in some applications and critical in others. Both the L3 Stormscope and the Avidyne/Ryan TCAD require very good ground planes. Tests at Ryan on the silver plated copper paints showed degredation after a year and in some cases complete failure in 2 years. They suggest that as the skin flexes that microfissures occur in the conductive layer causing islands of conductivity between which there are non-effective areas. Rather than investigating further they just suggest that builders install a more effective ground plane like sheet metal or metal mesh. =20 =20 I used a Ni plated graphite non-woven fabric epoxied to the fuselage in the manner of another layer of BID. The non-woven materials are not as easy to apply as they tend to stick to the roller as much as to themselves. However they conform beautifully to complex curves. I had flat plaques tested at an open field site and they came back with data about the same as solid metal. As for longevity - ask me in a couple years after a few hundred pressure cycles. For now the TACD works fine and the Stormscope - well it is having a few internal problems so I do not know yet. =20 =20 Robert M. Simon ES-P N301ES =20 ------_=_NextPart_001_01C6E624.8444208A Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
From: = Lancair Mailing=20 List [mailto:lml@lancaironline.net] On Behalf Of John=20 Hafen
Sent: Sunday, October 01, 2006 11:34 PM
To: = Lancair=20 Mailing List
Subject: [LML] DuPont Corlar, BASF R-M Undercoat = DP25,=20 and SP-008A-PT Silver Plate Coper Coating

The highly conductive ground plane is of = marginal use in=20 some applications and critical in others.  Both the L3 Stormscope = and the=20 Avidyne/Ryan TCAD require very good ground planes.  Tests at Ryan = on the=20 silver plated copper paints showed degredation after a year and in some = cases=20 complete failure in 2 years.  They suggest that as the skin flexes = that=20 microfissures occur in the conductive layer causing islands of = conductivity=20 between which there are non-effective areas.  Rather than = investigating=20 further they just suggest that builders install a more effective = ground=20 plane like sheet metal or metal mesh. 
 
I used a Ni plated graphite non-woven = fabric epoxied=20 to the fuselage in the manner of another layer of BID.  The = non-woven=20 materials are not as easy to apply as they tend to stick to the roller = as much=20 as to themselves.  However they conform beautifully to complex=20 curves.  I had flat plaques tested at an open field site and they = came back=20 with data about the same as solid metal.  As for longevity - ask me = in a=20 couple years after a few hundred pressure cycles.  For now the TACD = works=20 fine and the Stormscope - well it is having a few internal problems so I = do not=20 know yet. 
 
Robert M. Simon
ES-P N301ES
 
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