Abstract: A nose cone assembly is provided comprising a nose cone, a support ring on which the nose cone is mounted, and an insulating layer disposed between the nose cone and the support ring, the insulating layer at least partially comprising glass fibres. A composite nose cone is also provided comprising an attachment region A, in which composite fibres are oriented substantially perpendicular to an axis of rotation of the nose cone, and an impact region I, in which composite fibres are oriented substantially parallel to the axis of rotation of the nose cone. Also provided is a support ring for a nose cone assembly, the support ring comprising an annular main body and an annular projecting attachment flange, the attachment flange terminating in a plurality of circumferentially spaced attachment tabs, wherein the attachment flange forms with the main body a cross section having at least two C curves.

Abstract: A nose cone assembly is provided comprising a nose cone, a support ring on which the nose cone is mounted, and an insulating layer disposed between the nose cone and the support ring, the insulating layer at least partially comprising glass fibres. A composite nose cone is also provided comprising an attachment region A, in which composite fibres are oriented substantially perpendicular to an axis of rotation of the nose cone, and an impact region I, in which composite fibres are oriented substantially parallel to the axis of rotation of the nose cone. Also provided is a support ring for a nose cone assembly, the support ring comprising an annular main body and an annular projecting attachment flange, the attachment flange terminating in a plurality of circumferentially spaced attachment tabs, wherein the attachment flange forms with the main body a cross section having at least two C curves.

Abstract: A nose cone assembly is provided comprising a nose cone 104, a support ring 106 on which the nose cone 104 is mounted, and an insulating layer 110 disposed between the nose cone 104 and the support ring 106, the insulating layer 110 at least partially comprising glass fibers. A composite nose cone is also provided comprising an attachment region A, in which composite fibers are oriented substantially perpendicular to an axis of rotation of the nose cone 104, and an impact region I, in which composite fibers are oriented substantially parallel to the axis of rotation of the nose cone 104. Also provided is a support ring 106 for a nose cone assembly, the support ring 106 comprising an annular main body 140 and an annular projecting attachment flange 142, the attachment flange 142 terminating in a plurality of circumferentially spaced attachment tabs 144, wherein the attachment flange 142 forms with the main body 140 a cross section having at least two C curves 160, 162.

Abstract: A damped assembly within a gas turbine, comprising a first member and a second member mechanically connected via an intermediate vibration dampener which has at least first and second surfaces for contacting the first and second members respectively, wherein either or both of the first and second surfaces include a plurality of raised portions in direct contact with the respective member and a plurality of recessed portions which contain adhesive for bonding the intermediate vibration dampener to the respective member.

Abstract: A composite has a laminar core assembly defining a bend, the bend having a radially inner surface defining a fillet. A reinforcement block adjacent to the radially inner surface of the bend has sufficient thickness to at least partly bury the fillet. The reinforcement block reduces the through-thickness tensile stress in the laminar core assembly and thereby reduces the risk of delamination.

Abstract: A tip treatment bar and associated rotor casing structure, wherein the tip treatment bar includes a solid composite structure having a plurality of layers arranged therein so as to provide the bar with a directional stiffness characteristic. Such a layered composite arrangement can be used to tailor the vibration characteristics of the bar. The tip treatment bar and casing structure may be suited for mounting relative to a fan or compressor in a gas turbine engine.

Abstract: A nose cone assembly is provided comprising a nose cone 104, a support ring 106 on which the nose cone 104 is mounted, and an insulating layer 110 disposed between the nose cone 104 and the support ring 106, the insulating layer 110 at least partially comprising glass fibres. A composite nose cone is also provided comprising an attachment region A, in which composite fibres are oriented substantially perpendicular to an axis of rotation of the nose cone 104, and an impact region I, in which composite fibres are oriented substantially parallel to the axis of rotation of the nose cone 104. Also provided is a support ring 106 for a nose cone assembly, the support ring 106 comprising an annular main body 140 and an annular projecting attachment flange 142, the attachment flange 142 terminating in a plurality of circumferentially spaced attachment tabs 144, wherein the attachment flange 142 forms with the main body 140 a cross section having at least two C curves 160, 162.

Abstract: A damped assembly 10 within a gas turbine, comprising a first member 12 and a second member 14 mechanically connected via an intermediate vibration dampener 18 which has at least first 20 and second 22 surfaces for contacting the first 12 and second members 14 respectively, wherein either or both of the first 20 and second 22 surfaces include a plurality of raised portions 28 in direct contact with the respective member and a plurality of recessed portions 30 which contain adhesive for bonding the intermediate vibration dampener 18 to the respective member.

Abstract: Use of composite structures in assemblies for components such as vanes in a gas turbine engine has advantages in terms of weight, but can have problems with regard to stress and strain in operational use. Such problems with regard to stress and strain occur particularly about fillets. By providing reinforcing blocks 5 which extend across at least part of the fillet displacement of stress and strain can be achieved in order to extend component life.