Rolls Royce Liberty Works Ultra Fan Engine

[Triton]

https://www.aiaa.org/uploadedFiles/About-AIAA/Press-Room/Key_Speeches-Reports-and-Presentations/2012/Martin-Lockheed-AVC-AIAA-GEPC2.pdf

 

[tartle]

A technical overview by Andrew Bradley of RR.... covers fans and open rotors.

 

[bobbymike]

Rolls-Royce UltraFan Gear Sets New Power Record | Aviation Week Network

Rolls-Royce says the gearbox assembly in development for the heart of the company’s new high-bypass demonstrator engine has set a record-breaking level of power transmission during pre-installation check-out tests.

aviationweek.com