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This paper presents the experimental estimation of the ignition pressure value produced by a primer in small arms ammunition. Investigations were performed using a chamber of the capacity equal to the capacity of the 12.7 mm ammunition case. The inner volume of the chamber was adjusted to the free volume in the cartridge by inserting a sleeve or gl...
Context in source publication
Context 1
... chamber had a capacity of 17.5 cm 3 , equal to the capacity of the cartridge case of 12.7 × 99 mm ammunition with an M33 Ball projectile, produced by MESKO SA (the volume of the projectile bottom was taken into account). The dimensions of the chamber are presented in Figure 2. The bottom of the case with the primer was positioned in the chamber. ...
Citations
... The aim of this work was to estimate the force value of the priming mixture in a primer used in 12.7 × 99 mm ammunition with an M33 Ball projectile produced by MESKO S.A. (Skarżysko Kamienna, Poland). The experimental setup used in [7] to determine the ignition pressure value was used. Based on the results of pressure measurements, three approaches for the estimation of the priming mixture force were applied. ...
... The aim of this work was to estimate the force value of the priming mixt primer used in 12.7 × 99 mm ammunition with an M33 Ball projectile produced by S.A. (Skarżysko Kamienna, Poland). The experimental setup used in [7] to determ ignition pressure value was used. Based on the results of pressure measuremen approaches for the estimation of the priming mixture force were applied. ...
... The measurements performed in [7] established that the mass of the priming was 122 ± 10 mg, while the mass of the priming mixture products entering the c was 88 ± 5 mg. ...
This paper presents the results of the estimation of the priming mixture force for primers used in 12.7 mm ammunition. The method of estimation is based on the results of pressure measurements in a closed chamber into which the products of the combustion of the priming mixture flowed. The capacity of the chamber was changed by inserting sleeves of various volumes. Another estimation of the force value was performed using the results of earlier investigations in which the chamber was filled with glass balls. The determined values of the force were compared with the values estimated based on the accessible literature data. The obtained estimations of the force value are of the same order of magnitude as the force value of black powder. This justifies the use of black powder characteristics for the assessment of the thermodynamic properties of priming mixture combustion products in interior ballistics calculations. The time of action of the investigated primer was determined using the optical recording of the outflow of the priming mixture combustion products into an open space. To facilitate the interpretation of the results of the experiments, a theoretical model was used.
