Rolls-royce Corporation

Eric Wright

Kenneth Franklin Udall

Peter G Farrar

Nicholas J Peacock

David D Drew

A turbofan gas turbine engine is provided with a polygonal rigid frame formed by a hub member, a plurality of radially extending spokes and a plurality of straight members connect to the radially outer ends of the spokes. The hub member is secured to the core casing and the straight members are secured to the core casing and the straight members are secured to the fan casing. Brackets are provided at two hard points at the radially outer ends of two adjacent hard points at the radially outer end of two adjacent spokes and brackets are provided at two hard points at the radially inner ends of two other spokes. The spokes have a chord length of six times that of conventional outlet guide vanes. The hard points are connected by links to a bracket at a first axial position on the aircraft stub pylon extension and the hard points are connect by links to a bracket at a second axial position on the stub pylon extension to form a rigid triangular structure to mount the engine from the aircraft.

Mounting for coupling a turbofan gas turbine engine to an aircraft

The invention relates to intakes for turbopropeller gas turbine engines of the tractor type. A tractor turbopropeller gas turbine engine comprises a gas generator, an upstream propeller and a downstream propeller. The propellers are positioned upstream of the gas generator, and the propellers are driven via shaft means and gear means. An intake means supplies air to the gas generator, the intake means comprises an intake opening and an intake duct. The intake opening is positioned axially between the propellers, and a portion of the intake duct extends axially through the downstream propeller. This arrangement reduces the length of the shaft and the turbopropeller gas turbine engine, and reduces the weight accordingly. The intake opening is arranged to provide improved protection against ingestion of large foreign objects, such as birds, into the intake duct and gas generator.

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Nottinghamshire, United Kingdom

Eric Wright