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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v1.i1-6.170
pages 227-239

Structure and Ballistic Properties of the Rheinmetall RH 49 Base Bleed Projectile

Lutz Borngen
Department of Ballistics, Rheinmetall GmbH, Germany
Ulf Hahn
Development Artillery Ammunition, Rheinmetall GmbH, Germany

ABSTRAKT

In this paper we present our 155 mm Base Bleed Projectile RH 49 with bomblet submunition. This projectile is effective against semi hard targets at ranges up to 31 km. The shell carries 49 grenades of the type RH II with self-destruction device. The Base-Bleed unit which consists of two parts, gives an increase of range of 19−26 % when compared with RH 49 Base-Bleed inert at burning times of 26 - 36 sec, corresponding to average burning rates of 1,4 mm/sec at normal conditions and of 1 mm/sec at trajectories for maximum range. From radar measurements we calculate CD-values as a function of Mach-numbers. A typical curve for a baseburnprojectile is obtained this way.
During the burning of the Base-Bleed the drag coefficient of the projectile is almost independent on the velocity. After burn-out the Co-values approach the curve of the projectile with inert Base-Bleed unit.
To obtain a precise Co-curve during baseburning, we used a semi-empirical model developed at Rheinmetall for simulation of the Base-Bleed effect. This simulation is based on the theory of the outlet of a jet of gas from a reservoir. The simulation of the Base-Bleed effect is linked with a point mass trajectory model.


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