Filament-wound venturi

Details Filament-wound venturi Filament-wound venturi

F - Mech Eng,Light,Heat,Weapons

41

A

89/39, 154/53.1

F41A 21/02 (2006.01) F02K 9/34 (2006.01)

Patent

CA 1220961

ABSTRACT A venturi section or cone for a lightweight firearm such as a recoilless gun which is subjected to high transient pressures and temperatures on firing is formed from a resin impregnated multi-filament fibre material. The material in the form of an elongated tow is wound on a mandrel, cured, and then removed from the mandrel for subsequent operations such as machining or assembly. During manufacture, a hot gas erosion preventing layer is first formed on the mandrel and a plurality of layers of tow are helically wound thereon at a helix angle selected to provide adequate axial and hoop strengths for resisting axial thrust and hoop loads produced on firing. Lightweight recoilless guns using such venturi cones are lighter and cheaper to fabricate than conventional guns and will fire more rounds before excessive erosion causes them to be unusable.

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