Not starting an argument but the CO2 extinguisher outputs "dry ice" as
a result of the cooling of expanding gas. In other words it both cuts
off air supply and cools the area.   Also a lot easier to clean up.
The important thing here is the size of the cylinder. Tiny is not what
you want.
On Wednesday, August 4, 2004, at 10:49  AM, Automatic digest processor
wrote:

> From:    Andrew Grebneff <andrew.grebneff@STONEBOW.OTAGO.AC.NZ>
> Subject: Re: Fire Suppression Solutions
>
>> The chemical cylinder would need to be big enough to
>> completely flood the engine compartment sufficiently so that even with
>> the chemicals that would escape out the bottom under the engine, there
>> would be enough going into the area to suffocate any flames.
>
> The thing we were told on our extinguisher course was that you must
> not only out the fire out, you must cool things down so that there is
> no reignition. This is one thing where dry-powder extinguishers are
> superior. We were told that for fires above floor/ground-level,
> carbon dioxide flows down and this often allows the fire to reignite.
>