Photographs of Some Effects on Rain Drops of Shock Waves Produced By 60-Caliber and 20-mm Projectiles
Report Number: WADC TR 56-393 Volume I p. 57-82
Author(s): Seidl, F. G. P.
Corporate Author(s): Boeing Airplane Company
Laboratory: Electronic Components Laboratory
Date of Publication: 1956-08
Pages: 26
Contract: AF 33(616)-3212
DoD Project: 4158
DoD Task: 41547
Identifier: This paper is part of a conference proceedings. See AD0097150
Abstract:
Projectiles from a 60-caliber and a 20-mm gun were fired-through simulated rain drops of diameters 1.7 ± .3mm. The projectile velocities were varied from 1900 ft/sec to 4060 ft/sec and in certain cases the intensities of the bow shock waves could be estimated. Motion-picture sequences of the interactions of the projectiles and rain drops were taken by a Fastax high-speed camera setup. Times between successive photographs were approximately 150 microseconds. '!'he impacts of the low shock waves were seen to jar and distort the rain drops which always broke up some 600 to 4000 microseconds later.. The times required for breakup seemed to depend upon the shock wave intensity. In cues requiring times of the order of 4000 microseconds, blasts of debris and gaseous explosion products from the gun muzzle may have contributed to the breakup.
Provenance: Bombardier/Aero
Author(s): Seidl, F. G. P.
Corporate Author(s): Boeing Airplane Company
Laboratory: Electronic Components Laboratory
Date of Publication: 1956-08
Pages: 26
Contract: AF 33(616)-3212
DoD Project: 4158
DoD Task: 41547
Identifier: This paper is part of a conference proceedings. See AD0097150
Abstract:
Projectiles from a 60-caliber and a 20-mm gun were fired-through simulated rain drops of diameters 1.7 ± .3mm. The projectile velocities were varied from 1900 ft/sec to 4060 ft/sec and in certain cases the intensities of the bow shock waves could be estimated. Motion-picture sequences of the interactions of the projectiles and rain drops were taken by a Fastax high-speed camera setup. Times between successive photographs were approximately 150 microseconds. '!'he impacts of the low shock waves were seen to jar and distort the rain drops which always broke up some 600 to 4000 microseconds later.. The times required for breakup seemed to depend upon the shock wave intensity. In cues requiring times of the order of 4000 microseconds, blasts of debris and gaseous explosion products from the gun muzzle may have contributed to the breakup.
Provenance: Bombardier/Aero
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This report is part of the following conference:
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Proceedings of the OSU-WADC Radome Symposium
WADC TR 56-393 Volume 1