VII. Blast Devices Flame Foogaiie (Figure I)
1. DESCRIPTION. The flame fou^-iase id a variation of the exploding flame device in which the flame ia projected by explosive means in a predetermined direction over a preselected nrcn. It ie a I ••hot expedient which can be used tffeclively in the defense. The flame fougasee consist* of an empty 8-inch howitzer propelling charge or similar container, fitted with thickened fuel and equipped with an explosive charge (propellant), a wood disc (piston), and a white phosphorus gcer.acle (igniter). Flame fougasscs ran he emplaced along barbed wire, where the nature of the terrain does not permit barbed wire obstacles to be covered effectively with flanking fires.
a. The flame fougasse should be atocrnbled in a vertical position.
A Ij'4-pound piece of composition C-J explosive is formed around an electric blasting cap and placed in the bottom of the container. Black powder may be substituted for the explosive and grenade igniter. If powder is used as the propeJlantf squibe are preferred in place oi blasting cape. Wires from the electric blasting cap are brought out of the case through a small hole punched in the side of the case near :he top rim.
b. A wood disc approximately 2 inches thick and 8 inches in diameter (1/4 inch less than the inside diameter of the container) is placed in the container. The disc should fit into the container easily with approximately a 1/8-inch clearance and should lie flat in the bottom of the container and rest on top of the explosive and blasting cap.
c. The ease is filled with a 5 percent thickened fuel mixture (approximately 5 gallons).
d. The metal cap is replaced on the container. The rubber gasket should be on the cap and should be seated firmly to prevent thickened fuel from spilling* The spider of the cap ia engaged in the slots for transporting only.
e. The detonating cord-WP hand grenade assembly ts prepared by taping or tying the fute handle tightly to the body of the grenade; spread the tips of the grenade cotter pin sufficiently to ensure that the cotter pin will not work free; wrap five turns of the detonating cord around the body at the grenade and secure with a clove hitch. Attach an electric or nonelectric blasting cap to one end of the detonating cord. Sympathetic detonation from the detonating cord will activate the grenade booster thereby producing the desired ignition.
3. RANGE« Range will be determined by the degree of slope of the emplacement» amount of explosive used« thick/less of fuel, and wind direction. The flame will be projected under optimum conditions over an area 50 meters lorg by 10 meter* wide.
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