Flamethrower, Portable, No 2

The Ack Pack was a harness carrying a ring-shaped fuel container with a capacity of 4 Imperial gallons of fuel on the operator's back. Located in the middle of the ring was a spherical container holding the propelling gas which was pressurized to 2,000 lbf/in .This was sufficient to propel the burning fuel 120 feet. A hose from the fuel tank passed to the nozzle assembly which had two pistol grips to hold and aim the spray, one equipped with the trigger. The Ack Pack nozzle was fitted with a 10-chambered cylinder which contained the ignition cartridges. These could be fired once, each giving the operator 10 bursts of flame. In practice this gave 10 one-second bursts. It was also possible to spray fuel without igniting it to ensure there was plenty splashed around the target, then fire an ignited burst to light up the whole lot.