The Murphy Builders Site

Posted: **Fri Feb 17, 2012 5:39 pm**

Chuck; You are right to be worried. On my Rebel the instructions call for an alum. extension. I have purchased, from Aircraft Spruce, some fireproof material which I will glue to the engine side of the extension.

Lonnie
R171

-----Original Message-----
From: Charles Skorupa <Chas@wa.freei.net (Chas@wa.freei.net)>
To: Murphy Rebel Users Group <murphy-rebel@dcsol.com (murphy-rebel@dcsol.com)>
Date: Monday, December 06, 1999 12:55 AM
Subject: Windshield Over Firewall

Hi All,
On the Elite or Rebels that move the firewall back 3 inches, the windshield appears to overlap the vertical firewall. Checking my Elite manual, there is an extension piece added for the windshield to rest on. I presume the something similar is necessary on a Rebel having the firewall moved back. My question and concern is that it seems this overlapping piece should be designed to the same criteria as the firewall both in thickness and material (stainless steel?) since breaching it would provide a direct path for smoke or fire from the engine compartment into the cockpit in a real bad place: at the base of the windshield. Maybe some other sort of thermal barrier needs to be put there as well. Haven't checked the material or thickness of the piece provided with the Elite kit since that part is boxed up now. Perhaps only part of the windshield flange overlaps the firewall and this is a non-problem? Any thoughts or is this an imaginary problem since I haven't constructed this area yet?

- Chuck Skorupa -
SN 500E (taildragger)

Posted: **Fri Feb 17, 2012 5:39 pm**

Hi All,
On the Elite or Rebels that move the firewall back 3 inches, the windshield appears to overlap the vertical firewall. Checking my Elite manual, there is an extension piece added for the windshield to rest on. I presume the something similar is necessary on a Rebel having the firewall moved back. My question and concern is that it seems this overlapping piece should be designed to the same criteria as the firewall both in thickness and material (stainless steel?) since breaching it would provide a direct path for smoke or fire from the engine compartment into the cockpit in a real bad place: at the base of the windshield. Maybe some other sort of thermal barrier needs to be put there as well. Haven't checked the material or thickness of the piece provided with the Elite kit since that part is boxed up now. Perhaps only part of the windshield flange overlaps the firewall and this is a non-problem? Any thoughts or is this an imaginary problem since I haven't constructed this area yet?

- Chuck Skorupa -
SN 500E (taildragger)

Posted: **Fri Feb 17, 2012 5:39 pm**

Would that be "Fibrefrax" material ?? If so, that is a VERY good choice !
There is a Rebel here with an aluminum firewall, with 2 layers of Fiberfrax
glued onto it, that was passed by our inspectors as airworthy !!! (After
a year of paperwork & testing,.... but now OK ! )

This is great stuff to use for fire protection, and also acts as a heat
and sound damper ..... It is usually glued with a Silica adhesive, which
is also fire resistant. This combination is sometimes used to line blast
furnaces !!

Everybody with the firewall moved back should at least look at putting
this stuff under the "winshield overhang" area....

.....bobp

-----------------------------orig.--------------------------------------------
At 06:20 AM 12/6/99 -0500, you wrote:

Chuck; You are right to be worried. On my Rebel the instructions call for

an alum. extension. I have purchased, from Aircraft Spruce, some fireproof
material which I will glue to the engine side of the extension.

Lonnie
R171
-----Original Message-----
From: Charles Skorupa <Chas@wa.freei.net>
To: Murphy Rebel Users Group <murphy-rebel@dcsol.com>
Date: Monday, December 06, 1999 12:55 AM
Subject: Windshield Over Firewall

Hi All,
On the Elite or Rebels that move the firewall back 3 inches, the

windshield appears to overlap the vertical firewall. Checking my Elite
manual, there is an extension piece added for the windshield to rest on. I
presume the something similar is necessary on a Rebel having the firewall
moved back. My question and concern is that it seems this overlapping piece
should be designed to the same criteria as the firewall both in thickness
and material (stainless steel?) since breaching it would provide a direct
path for smoke or fire from the engine compartment into the cockpit in a
real bad place: at the base of the windshield. Maybe some other sort of
thermal barrier needs to be put there as well. Haven't checked the material
or thickness of the piece provided with the Elite kit since that part is
boxed up now. Perhaps only part of the windshield flange overlaps the
firewall and this is a non-problem? Any thoughts or is this an imaginary
problem since I haven't constructed this area yet?

- Chuck Skorupa -
SN 500E (taildragger)
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<DIV><FONT color=#000000 size=2>Chuck; You are right to be worried. 

On my

Rebel the instructions call for an alum. extension.  I have purchased,

from

Aircraft Spruce, some fireproof material which I will glue to the engine

side of

the extension.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT color=#000000 size=2>Lonnie</FONT></DIV>
<DIV><FONT color=#000000 size=2>R171 </FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">
<DIV><FONT face=Arial size=2><B>-----Original Message-----</B><BR><B>From:
</B>Charles Skorupa <<A
href="mailto:Chas@wa.freei.net">Chas@wa.freei.net</A>><BR><B>To:
</B>Murphy Rebel Users Group <<A

href="mailto:murphy-rebel@dcsol.com">murphy-rebel@dcsol.com</A>><BR><B>Date:

</B>Monday, December 06, 1999 12:55 AM<BR><B>Subject: </B>Windshield Over
Firewall <BR><BR></DIV></FONT>
<DIV><FONT face=Arial size=2>Hi All,</FONT></DIV>
<DIV><FONT face=Arial size=2>On the Elite or Rebels that move the firewall
back 3 inches, the windshield appears to overlap the vertical
firewall.  Checking my Elite manual, there is an extension piece

added

for the windshield to rest on.  I presume the something

similar is

necessary on a Rebel having the firewall moved back.  My question and
concern is that it seems this overlapping piece should be

designed

to the same criteria as the firewall both in thickness and material
(stainless steel?) since breaching it would provide a direct path for
smoke or fire from the engine compartment into the cockpit in a real bad
place: at the base of the windshield.  Maybe some other

sort

of thermal barrier needs to be put there as well.  Haven't checked

the

material or thickness of the piece provided with the Elite kit since
that part is boxed up now.  Perhaps only part of the windshield

flange

overlaps the firewall and this is a non-problem?  Any thoughts or is
this an imaginary problem since I haven't constructed this area
yet?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> - Chuck Skorupa -</FONT></DIV>
<DIV><FONT face=Arial size=2> SN 500E
(taildragger)</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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