Rolls-Royce LiftSystem

The Rolls-Royce LiftSystem® comprises the Rolls-Royce LiftFan®, Driveshaft, 3 Bearing Swivel Module (3BSM) and Roll Posts.

The LiftFan, a 50-inch, two-stage counter-rotating fan capable of generating more than 20,000lbf of thrust, is driven from a conventional gas turbine and produces the forward vertical lift. The 3BSM is a swivelling jet pipe capable of redirecting the main engine thrust downward to provide the rear vertical lift. It can rotate through 95 degrees in 2.5 seconds and passes 18,000lbf of thrust. Aircraft roll control is achieved using the Roll Posts mounted in the wings of the aircraft, which provide a further 1,950lbf of thrust each.

Rolls-Royce is teamed with Pratt & Whitney to develop the F135 STOVL propulsion system for the F-35B Joint Strike Fighter and ensure interchangeability with the GE Rolls-Royce F136 engine.

Rolls-Royce is managing the overall development and integration programme from its site in Bristol, UK, which is also responsible for the LiftFan turbomachinery, 3BSM and Roll Post designs. The team in Indianapolis, US, will provide the system’s gearbox, clutch, driveshaft and nozzle and will conduct the build and verification testing of the LiftFan.