Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno

Dinesh Ravindre Ramlal

Christoffel Adrianus Van Driel

Michiel Hannes Straathof

Martijn Zebregs

The invention is directed to a co-layered propellant grain having an exposed outer surface, wherein said propellant grain comprises an outer layer comprising a slow burning propellant composition located on essentially the entire outer surface of the grain, and an inner layer comprising a fast burning propellant composition having a higher linear burn rate than said slow burning propellant composition; wherein said propellant grain has a structure such that after ignition, the inner layer becomes increasingly exposed at the outer surface.

Co-layered propellant charge

The invention is in the field of propellants. In particular the invention is directed to a propellant for ammunition, such as medium and large caliber gun ammunition, having improved performance. In accordance with the present invention a propellant charge comprises one or more longitudinally extending, progressive-externally burning grains having a number of perforations passing through the grains in the length direction and having a cross-sectional shape (perpendicular to the grain's length direction) that is elongated.

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's-Gravenhage, Netherlands

Dinesh Ravindre Ramlal