Combustion Tests of Black-Powder Substitutes for the Hand-Held Signal Flare
Final rept. Aug 1988-Aug 1989
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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Replacement of the black powder in hand-held signal flares with energetic materials of more consistent combustion properties is being studied. The black powder is currently used in both pressed and granular states to provide for the functions of ignition, propulsion, timing, payload expulsion, and ignition of the illuminant. The laboratory work described in this report is intended to provide a rational basis for evaluating candidate materials to replace black powder in these various functions. Linear burning rates of pressed materials were determined over the pressure range of 2 MPa to 4 MPa for Goex black powder, Pyrodex RS, and four black powder substitutes. Fixtures were designed and instrumented to simulate those flare functions requiring granular forms of the energetic material. Temperature and pressure data from these fixtures permit a comparison of the performance of the candidate substitutes relative to black powder in the motor ignition and payload expulsion phases of the flare operation.
- Ammunition and Explosives
- Combustion and Ignition