Gas turbine engine casing

Claim 1

In a gas turbine engine having a duct defining fixed structure and at least a rotating part positioned within the duct, the improvement of a containment ring carried by said duct and positioned radially outwardly of said rotating part for absorbing energy and retaining a missile thrown radially outwardly by said rotating part, said containment ring comprising: a substantially rigid cylinder coaxial with and carried by said duct, said rigid cylinder having an inner periphery and an outer periphery; a fibrous material having one end bonded to the outer periphery of said rigid cylinder and being wound around said rigid cylinder to define a plurality of layers, said fibrous material having another end bonded to an adjacent one of said layers, and said layers having an outermost curved surface; a plurality of axially extending and circumferentially spaced strips positioned upon the outermost curved surface of said plurality of layers; fastening means extending into said layers of fibrous material and securing said strips thereto; and second fastening means securing said strips to adjacent fixed structures.