X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 28 Jun 2012 14:08:43 -0400 Message-ID: X-Original-Return-Path: Received: from vms173021pub.verizon.net ([206.46.173.21] verified) by logan.com (CommuniGate Pro SMTP 5.4.6) with ESMTP id 5630030 for lml@lancaironline.net; Thu, 28 Jun 2012 12:22:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.21; envelope-from=n5zq@verizon.net Received: from BillHP ([unknown] [173.72.178.191]) by vms173021.mailsrvcs.net (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) with ESMTPA id <0M6C00DCT5FJKZ80@vms173021.mailsrvcs.net> for lml@lancaironline.net; Thu, 28 Jun 2012 11:21:20 -0500 (CDT) X-Original-Message-id: From: "Bill Harrelson" X-Original-To: "Lancair Mailing List" References: In-reply-to: Subject: Re: [LML] Re: LN2 queries X-Original-Date: Thu, 28 Jun 2012 12:21:15 -0400 MIME-version: 1.0 Content-type: multipart/alternative; boundary="----=_NextPart_000_0054_01CD5528.835B3D60" 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_0054_01CD5528.835B3D60 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Colyn, On the 320 my firewall installation is 100% stock. The manual calls out = a layer (or was it two?) of fibrefrax and stainless on top. You might be = thinking of the IV which uses a blanket type arrangement. Not sure = what=92s used on the Legacies. Bill Harrelson N5ZQ 320 2,050 hrs N6ZQ IV under construction=20 http://www.mykitlog.com/harrelson/ From: Colyn Case=20 Sent: Thursday, June 28, 2012 10:27 AM To: lml@lancaironline.net=20 Subject: [LML] Re: LN2 queries Bill,=20 Covering the firewall with stainless seems like a big improvement. I = see you dispensed with the blanket? ....or did you? What is the rationale for eliminating the insulating effect of the = blanket? Colyn On Jun 27, 2012, at 6:41 PM, = wrote: Posted for "Bill Harrelson" : Rob, =20 I did not ground (earth) any of my fuel tanks. I am not aware of any = 320/360=20 builder who has done so. Having said that, it is certainly not a bad = idea as=20 long as you do it in a lightweight manner.=20 =20 As far as the fibrefrax, it=92s good stuff. I put it in beneath the = stainless=20 steel firewall per the manual. What I found is that under compressive = loads it=20 gets squeezed flat causing the stainless to wrinkle. This will have = little or=20 no practical implication...but it looks like crap. I removed everything = from=20 the firewall and replaced the fibrefrax with washers everywhere that = something=20 was bolted to the firewall. This included the engine mount bolts. Now, I = have=20 solid, no compression, surfaces at the bolts and no wrinkles in the = stainless=20 while retaining the heat/fire resistance of the fibrefrax.=20 =20 The first photo shows the fibrefrax cut out around the washers (phenolic = behind the battery) and ready for the stainless to be added. The second photo is the completed firewall with everything torqued down = and=20 no wrinkles. I burnished the stainless with scotchbrite and a hand = drill. =20 Let me know if you need more info. =20 =20 =20 Bill Harrelson N5ZQ 320 2,050 hrs N6ZQ IV under construction http://www.mykitlog.com/harrelson/ =20 =20 =20 =20 ------=_NextPart_000_0054_01CD5528.835B3D60 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Colyn,
 
On the 320 my firewall installation is = 100%=20 stock. The manual calls out a layer (or was it two?) of fibrefrax and = stainless=20 on top. You might be thinking of the IV which uses a blanket type = arrangement.=20 Not sure what=92s used on the Legacies.
 
Bill Harrelson
N5ZQ 320 2,050 hrs
N6ZQ  IV under construction
 
 
 
 
From: Colyn Case
Sent: Thursday, June 28, 2012 10:27 AM
Subject: [LML] Re: LN2 queries
 
Bill,=20
 
Covering the firewall with stainless seems like a big = improvement.  I=20 see you dispensed with the blanket?  ....or did you?
What is the rationale for eliminating the insulating effect of the=20 blanket?
 
Colyn
 
On Jun 27, 2012, at 6:41 PM, <marv@lancair.net> <marv@lancair.net> wrote:
 


Posted for "Bill Harrelson" <n5zq@verizon.net>:

Rob, 
I=20 did not ground (earth) any of my fuel tanks. I am not aware of any = 320/360=20
builder who has done so. Having said that, it is certainly not a bad = idea as=20
long as you do it in a lightweight manner.
 
As far as = the=20 fibrefrax, it=92s good stuff. I put it in beneath the stainless =
steel firewall=20 per the manual. What I found is that under compressive loads it
gets = squeezed flat causing the stainless to wrinkle. This will have little or =
no=20 practical implication...but it looks like crap. I removed everything = from=20
the firewall and replaced the fibrefrax with washers everywhere that = something
was bolted to the firewall. This included the engine mount = bolts.=20 Now, I have
solid, no compression, surfaces at the bolts and no = wrinkles in=20 the stainless
while retaining the heat/fire resistance of the = fibrefrax.=20
 
The first photo shows the fibrefrax cut out around the = washers=20 (phenolic
behind the battery) and ready for the stainless to be=20 added.
The second photo is the completed firewall with everything = torqued=20 down and
no wrinkles. I burnished the stainless with scotchbrite and = a hand=20 drill.
 
Let me know if you need more=20 info.
 
 
 
Bill Harrelson
N5ZQ 320 2,050=20 hrs
N6ZQ  IV under construction
 http://www.mykitlog.com/harre= lson/
 
 
 
 
------=_NextPart_000_0054_01CD5528.835B3D60--