Chuck_Harbert@arkwright.com wrote:

Paul,  Halon requires a enclosed space and a 5-10% concentration of the gas to
extinguish a fire (electrical or flame liquid only). The advantage is that you
can breath in the gas. It wouldn't work for an open engine compartment, but
would inside the cabin. There are now several replacements for the old Halon
products which will not damage the ozone layer. All of these (old and new) are
very expensive (hundreds of $$$). There's demand for the old gas because it's
expensive to convert to the new gases. It's exactly the same for auto air
conditioning systems using Freon which is a close cousin chemically.

How is your airplane coming Chuck? I was in Seatle yesterday but
unfortunately
I did not bring your phone number with me.
Also some of your messages bounce from time to time in case you 
are unaware of that.
 
Paul Lamar
 
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