A venturi section or cone for a lightweight firearm such as a recoilles gun which is subjected to high transient pressures and temperatures on firing is formed from a resin impregnated multi-filament fiber 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 two 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.
申请公布号
US4843946(A)
申请公布日期
1989.07.04
申请号
US19870117927
申请日期
1987.11.04
申请人
HER MAJESTY THE QUEEN IN RIGHT OF CANADA, AS REPRESENTED BY THE MINISTER OF NATIONAL DEFENSE OF HER MAJESTY'S CANADIAN GOVERNMENT
发明人
GLADSTONE, DAVID H.;LANGLOIS, RAYMOND;ROBERTSON, WILLIAM J.