Fire Extinguisher
I'm also looking at fire suppression options and had a good discussion with my neighbor regarding Halon fire suppression. He's currently using a 20lb Halon system with two nozzles (one for driver, one for engine) in his dragster.
He recently experienced an engine fire at 170+ mph...got the car stopped and used the Halon to put the fire out. However, he felt the Halon dissipated too quickly in the wind/at speed...nobody hurt, but he felt it was only because safety crews were on scene in seconds with more extinguishers.
He's decided to switch to aqueous foam. Unfortunately, aqueous foam has both high and low temp limitations (not to mention what it would do to avionics)-not good for aircraft.
Still looking for the best option...small handheld extinguisher may be the best solution for the weight.
Mike