PROPELLANT EXTRUSION USING SHAPED PERFORATION PINS

An extruded stick-type propellant grain is disclosed that includes a length separated from a strand of extruded propellant material having a predetermined cross-sectional shape provided with a predetermined number of spaced, radially distributed, hollow non-round longitudinal perforations formed in...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GABRYSCH, LESLIE P, HARRIS, MARLON D, WORRELL, WILLIAM J., JR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AMMUNITION BLASTING CHEMISTRY COMBUSTION ENGINES EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION EXPLOSIVES EXPLOSIVES OR THERMIC COMPOSITIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 JET-PROPULSION PLANTS LIGHTING MANUFACTURE THEREOF MATCHES MECHANICAL ENGINEERING METALLURGY USE OF SINGLE SUBSTANCES AS EXPLOSIVES WEAPONS
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Beschreibung
Zusammenfassung:	An extruded stick-type propellant grain is disclosed that includes a length separated from a strand of extruded propellant material having a predetermined cross-sectional shape provided with a predetermined number of spaced, radially distributed, hollow non-round longitudinal perforations formed in said length of propellant material parallel to and extending along the length thereof and separated and surrounded by a web of the propellant material. The perforations have a geometric cross section selected from the group consisting of non-round shapes that enhance uniformity in unburned web thickness during a normal burn of said length of extruded propellant thereby reducing the amount of unburned slivers. A central perforation is also provided.