X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 28 Jun 2012 18:04:44 -0400 Message-ID: X-Original-Return-Path: Received: from imr-da05.mx.aol.com ([205.188.105.147] verified) by logan.com (CommuniGate Pro SMTP 5.4.6) with ESMTP id 5630275 for lml@lancaironline.net; Thu, 28 Jun 2012 14:23:31 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.105.147; envelope-from=Sky2high@aol.com Received: from mtaomg-da06.r1000.mx.aol.com (mtaomg-da06.r1000.mx.aol.com [172.29.51.142]) by imr-da05.mx.aol.com (8.14.1/8.14.1) with ESMTP id q5SIMskp022590 for ; Thu, 28 Jun 2012 14:22:54 -0400 Received: from core-mtd002a.r1000.mail.aol.com (core-mtd002.r1000.mail.aol.com [172.29.235.197]) by mtaomg-da06.r1000.mx.aol.com (OMAG/Core Interface) with ESMTP id 82D6BE000081 for ; Thu, 28 Jun 2012 14:22:54 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <16e92.26dd9e.3d1dfafe@aol.com> X-Original-Date: Thu, 28 Jun 2012 14:22:54 -0400 (EDT) Subject: Re: [LML] Re: LN2 queries X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_16e92.26dd9e.3d1dfafe_boundary" X-Mailer: AOL 9.7 sub 19 X-Originating-IP: [205.188.66.163] x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:500000992:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d338e4feca0fe2a19 --part1_16e92.26dd9e.3d1dfafe_boundary Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en Bill, =20 The 1989 plans called for 3 layers and I found that too thick. I used two= =20 layers. =20 Grayhawk =20 =20 In a message dated 6/28/2012 1:08:57 P.M. Central Daylight Time, =20 n5zq@verizon.net writes: =20 Colyn, =20 On the 320 my firewall installation is 100% stock. The manual calls out a= =20 layer (or was it two?) of fibrefrax and stainless on top. You might be=20 thinking of the IV which uses a blanket type arrangement. Not sure what=E2= =80=99s used=20 on the Legacies. =20 Bill Harrelson N5ZQ 320 2,050 hrs N6ZQ IV under construction=20 _http://www.mykitlog.com/harrelson/_ (http://www.mykitlog.com/harrelson/)= =20 =20 =20 =20 =20 =20 =20 From: _Colyn Case_ (mailto:colyncase@earthlink.net) =20 Sent: Thursday, June 28, 2012 10:27 AM To: _lml@lancaironline.net_ (mailto:lml@lancaironline.net) =20 Subject: [LML] Re: LN2 queries =20 Bill, =20 Covering the firewall with stainless seems like a big improvement. I see= =20 you dispensed with the blanket? ....or did you? What is the rationale for eliminating the insulating effect of the blanket= ? =20 Colyn =20 =20 =20 On Jun 27, 2012, at 6:41 PM, <_marv@lancair.net_ (mailto:marv@lancair.net)= =20 > <_marv@lancair.net_ (mailto:marv@lancair.net) > wrote: =20 Posted for "Bill Harrelson" <_n5zq@verizon.net_ (mailto:n5zq@verizon.net) >= : Rob, I did not ground (earth) any of my fuel tanks. I am not aware of any=20 320/360 =20 builder who has done so. Having said that, it is certainly not a bad idea = =20 as=20 long as you do it in a lightweight manner.=20 As far as the fibrefrax, it=E2=80=99s good stuff. I put it in beneath the= =20 stainless=20 steel firewall per the manual. What I found is that under compressive=20 loads it =20 gets squeezed flat causing the stainless to wrinkle. This will have little = =20 or=20 no practical implication...but it looks like crap. I removed everything =20 from=20 the firewall and replaced the fibrefrax with washers everywhere that =20 something=20 was bolted to the firewall. This included the engine mount bolts. Now, I= =20 have=20 solid, no compression, surfaces at the bolts and no wrinkles in the=20 stainless=20 while retaining the heat/fire resistance of the fibrefrax.=20 The first photo shows the fibrefrax cut out around the washers (phenolic= =20 behind the battery) and ready for the stainless to be added. The second photo is the completed firewall with everything torqued down=20 and=20 no wrinkles. I burnished the stainless with scotchbrite and a hand drill. Let me know if you need more info. Bill Harrelson N5ZQ 320 2,050 hrs N6ZQ IV under construction _http://www.mykitlog.com/harrelson/_ (http://www.mykitlog.com/harrelson/)= =20 --part1_16e92.26dd9e.3d1dfafe_boundary Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
Bill,
 
The 1989 plans called for 3 layers and I found that too thick.  I= used=20 two layers.
 
Grayhawk
 
In a message dated 6/28/2012 1:08:57 P.M. Central Daylight Time,=20 n5zq@verizon.net writes:
=
Colyn,
 
On the 320 my firewall installation is 1= 00%=20 stock. The manual calls out a layer (or was it two?) of fibrefrax and=20 stainless on top. You might be thinking of the IV which uses a blanket ty= pe=20 arrangement. Not sure what=E2=80=99s 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.&n= bsp;=20 I 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 320/36= 0=20
builder who has done so. Having said that, it is certainly not a bad = idea=20 as
long as you do it in a lightweight manner.
 
As far as= the=20 fibrefrax, it=E2=80=99s good stuff. I put it in beneath the stainless steel=20 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 l= ittle=20 or
no practical implication...but it looks like crap. I removed every= thing=20 from
the firewall and replaced the fibrefrax with washers everywhere = that=20 something
was bolted to the firewall. This included the engine mount= =20 bolts. Now, I have
solid, no compression, surfaces at the bolts and n= o=20 wrinkles in the stainless
while retaining the heat/fire resistance of= the=20 fibrefrax.
 
The first photo shows the fibrefrax cut out arou= nd=20 the washers (phenolic
behind the battery) and ready for the stainless= to=20 be added.
The second photo is the completed firewall with everything= =20 torqued down and
no wrinkles. I burnished the stainless with scotchbr= ite=20 and a hand 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/
 
 
 
 
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