Rolls-royce Corporation

Michael O Hales

Craig W Bemment

Ian J Bousfield

Benjamin J Sellers

Stephen John Bradbrook

Mark J Wilson

Rory Douglas Stieger

Stephane M M Baralon

Christopher Benson

Benedict R Phelps

Amarveer S Mann

A gas turbine engine including: a high pressure turbine, a low pressure turbine, a high pressure compressor coupled to the high pressure turbine by a high pressure shaft, a propulsor and a low pressure compressor coupled to the low pressure turbine via a low pressure shaft and a reduction gearbox; wherein the high pressure compressor defines an average stage pressure ratio at cruise conditions of between 1.25 and 1.35 and consists of 10 or 11 stages; and the high pressure compressor and low pressure compressor together define a core overall pressure ratio at cruise conditions of between 40:1 and 60:1.

High pressure ratio gas turbine engine

A supersonic jet aircraft and a method of operating the same. The supersonic jet aircraft having at least three turbofan engines and an engine management computer. A first engine of the at least three turbofan engines is configured to be de-activatable during flight to move from an operational state in which it provides thrust to an operational state in which it stops providing thrust. Other engines of the at least three turbofan engines are configured to provide sufficient thrust to the supersonic jet aircraft when the first engine is de-activated such that the aircraft can perform a supersonic climb operation and/or a supersonic cruise operation.

Supersonic jet aircraft

A gas turbine engine has a cycle operability parameter &#x3b2; in a defined range to achieve improved overall performance, taking into account fan operability and/or bird strike requirements as well as engine efficiency. The defined range of cycle operability parameter &#x3b2; may be particularly beneficial for gas turbine engines in which the fan is driven by a turbine through a gearbox.

Aircraft engine operability

Growing community of inventors

Derby, United Kingdom

Michael O Hales