Morgans wrote:
"Teamfcar" wrote


Even with the larger 4L system it seems
to me the 16 or so pounds might buy some very valuable time in an
airplane.


Where would you chose to have the system protecting, the cockpit or under
the cowl, and why?

I cannot make a qualified answer for aircraft, but the SCCA requires one
nozzle for the engine bay and another for the Driver in the cockpit. A
5 lb Halon will go for 30 or 40 seconds from two nozzles In the engine
bay we usually aimed it at the carburetors (Dual Webers side drafts or
Fuel Injection) such that it would end up down on the oil pumps. As it
was explained to me the two most flammable things in the engine are the
fuel and the oil. In the cockpit it was right behind the dash aimed
down and back to cover the drivers legs and flow back up his torso. In
most cases in open wheel racing, the fuel cell either forms the back of
the seat or is nested to the back of the drivers seat. So that would be
the most likely source to feed any flames in the cockpit. In an
aircraft I would probably use the same ideas to allow the prevailing air
stream carry the AFFF or Halon to the likely site of the flames.

Mike Butler