REFLECTOR: Firewall materials

[Keith Hallsten]

Dave,

 

How expensive is this stuff, and where would one acquire some of it?  

 

If it's no more expensive than fiberfrax it may have application here.
However, I suspect that going beyond the fiberfrax & stainless sheet is
probably going to the point of diminishing returns.  After all, the aileron
control cables pass through the engine area.  If you have an engine fire
beyond the capacity of the fiberfrax/SS to resist, you are probably going to
run out of options real quick, anyway.  Firesleeve on the aileron push-pull
cables is a step in the right direction, but the aileron bellcrank attach
brackets are bolted to the fiberglass wing roots, which are going to burning
off pretty quick in a big fire.

 

Keith

    

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Dave Dent
Sent: Sunday, August 27, 2006 12:58 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Nomex/Stainless

 

Another material to use is Nextel high temp ceramic fabric.   It's good for
3000 deg. F.  But get it washed. It comes with a sizing on it.  But if you
check you can get it washed. I started using it over 20  yrs ago.  I used it
for making an inductive oven for processing metals.  It's very flexible and
can be epoxies into your cowling as well for exhaust shielding.  LLNL did
some extensive testing on it related to engine firewalls and found it to be
the best material you could use.  

Dave

 

 

----- Original Message ----- 

From: Milton Mersky <mailto:miltonm at airmail.net>  

To: 'Velocity Aircraft <mailto:reflector at tvbf.org>  Owners and Builders
list' 

Sent: Sunday, August 27, 2006 7:05 AM

Subject: Re: REFLECTOR: Nomex/Stainless

 

 

 

Kurt:

 

Nomex is only needed for the first fire.

 

I would suggest Nomex not be deleted.

 

Milt

 

 

 

 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Al Gietzen
Sent: Saturday, August 26, 2006 10:23 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Nomex/Stainless

Kurt;

 

I got the fiberfrax from A.S. and S.; and the .020 SS from a local metals
shop for a whole lot less than the nomex.  Worth checking.

 

Al

 

Subject: Re: REFLECTOR: Nomex/Stainless

 

So, let me get this right.... the NEW stuff is fiberfrax and .20
stainless..... what is the thickness of the old stuff. Have to admit... it
does look nicer. .

 

see what happens when you take forever to build...... all kinds of new stuff
happens. 

 

Kurt 

 

 

Just like I said, FiberFrax and .20 stainless...

Kurt, here's a link to a pic on Rich's website showing
how nice the thicker SS looks:

http://www.rguerra.com/velocity/engine/underTheEngine.jpg

Pat


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