And now with the data of hot/cold side
temperatures for intumescents, I may have to go back to the stainless/fiberfrax
as the preferred combination although I don’t have any data on that at
all.
It may be I have to put an intumescent
coating on top of the stainless/fiberfrax original or under those. My firewall
is glass/plywood/glass so it might not be as scary as softening honeycomb. Yeah,
I think I’ll believe that so I can move forward. Feel much better now.
Jim
From: Lancair Mailing
List [mailto:lml@lancaironline.net] On Behalf
Of mikeeasley
Sent: Friday, December 18, 2009
9:52 AM
To: lml@lancaironline.net
Subject: [LML] Re: Intumescent
firwall coating
It seems that the firewall blanket has to serve two
purposes, one to keep the fire from penetrating the firewall, and two to keep
the heat from softening the firewall. If I read the chart correctly, you
would start softening the firewall at about 500F in the engine compartment,
since the 3M material cuts the temp in about half.
In a message dated 12/18/09 08:19:52 Mountain Standard Time,
colyncase@earthlink.net writes:
Here's a document of the sort I was hoping to find for the
intumescent paint.
It shows hot face vs. cold face temperature.
Based on the original, it seems to me that is the
worry. e.g. the firewall gets soft somewhere above 250.