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By March 2022, Rolls-Royce had transferred the power gearbox, tested to 64 MW (86,000 hp), from Dahlewitz to its UK site for assembly, [72] By May 2023, the first run was made with an 80,000 lbf (360 kN) demonstrator having a 14:1 bypass ratio, carbon-titanium fan blades, an Advance3 core and a new combustor. [73]
The Rolls-Royce BR700 is a family of ... its bypass ratio is higher than 6.5:1 and its overall pressure ratio should exceed 50:1. ... run in early 2022 and the ...
The bypass ratio (BPR) of a turbofan engine is the ratio between the mass flow rate of the bypass stream to the mass flow rate entering the core. [1] A 10:1 bypass ratio, for example, means that 10 kg of air passes through the bypass duct for every 1 kg of air passing through the core.
Rolls-Royce are currently developing the Ultrafan which employs much of what is described above. [5] [6] In the 1980s the General Electric GE36 Unducted Fan (UDF), which actually flew on a McDonnell Douglas MD-80, employed two rows of contra-rotating variable pitch fan blades, albeit without any fan casing because it was a prop-fan engine.
The Rolls Royce Ultrafan is the largest and most efficient engine to allow multiple turbine speeds. The turbines behind the main fan are small and allow more air to pass straight through, while a planetary gearbox "allows the main fan to spin slower and the compressors to spin faster, putting each in their optimal zones."
Rolls-Royce's latest engine design for large turbofans (25,000lb to 110,000lb thrust), the UltraFan [6] includes a Powergear rated at a new high of 64MW (87,000hp) and has demonstrated this full power during testing in 2021. [7]
The Rolls-Royce Trent 7000 is a high-bypass turbofan engine produced by Rolls-Royce, an iteration of the Trent family powering exclusively the Airbus A330neo. Announced on 14 July 2014, it first ran on 27 November 2015. It made its first flight on 19 October 2017 aboard on the A330neo.
The 2022 FIA Formula One World Championship was a motor racing championship for Formula One cars, which was the 73rd running of the Formula One World Championship.It is recognised by the Fédération Internationale de l'Automobile (FIA), the governing body of international motorsport, as the highest class of competition for open-wheel racing cars.