<<I sprayed Silent Running on ......the rearside firewall of my -8.>>
You're in very risky territory. Remember, "self-extinguishing" means nothing when in contact with a 2000F firewall panel.
Postscript:
Silent Running publishes various data sheets on its website, inlcuding the results of test per ASTM Standard E162-02e, "Surface Flammability of Materials Using a Radiant Heat Energy Source".
It can be hard to find free web data about a particular standard, although the ASTM will sell you a copy for $43. In this case I got lucky and found an article describing the test proceedure. An 18" long sample is placed before a radiant heat source (think toaster oven elements), at an inclined angle of 30 degrees. The close end is 4.7" from the element. The element is regulated at a little less than 1250F. The test is run for a specified time period and the "flamability index" is mostly a matter of how far down the inclined sample flame is observed to progress. Put another way, how far away from the heat source must the sample be in order to become self-extinguishing?
In this case, all samples exhibited open flame to about halfway down the panel, and given the conditions we know the ignition temperature was less than 1250F.
If you must use Silent Running, apply it to the engine side of the firewall, not the cabin side.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Last edited by DanH : 08-31-2009 at 02:37 PM.
|