Pratt & Whitney is developing engine variants based on its Geared Turbofan
Technology while GE is laser-focused on the 9X which powers the 777X and is now scheduled to power the maiden 777X flight in early 2020 owing to a developmental delay.
This is required to allow for the testing of large, high air mass flow turbofan
engines that cannot be tested in altitude simulation facilities like PSL due to maximum airflow limitations.
Radial-axial flows turbofan
engine in configuration of the primary flow defined by [M.sub.a.I] air flow and the secondary flow defined by Ma.F air flow where the gas flow Mg from the primary flow is evacuated into the secondary flow of the turbofan
In the late 1950s, Rolls-Royce with the Conway engine and Pratt & Whitney Aircraft with the JT3D developed their first turbofan
engines, by adding a fan at the front end of an existing turbojet engine.
"The geared turbofan
could be a very good engine for both of those platforms."
The Geared Turbofan
engine will be a product unique in the aircraft industry, bringing double-digit reductions in fuel burn, environmental emissions, engine noise and operating costs, Volvo said.
Adding dimension to the emerging VLJ category is a single turbofan
aircraft being developed by Diamond.
In modern turbofan
jet engines, much of the air sucked in at the front "bypasses" the combustion chamber and is forced out the back of the engine, pushing the plane along much as the air coming off a propeller would.
The History of the Rolls-Royce RB211 Turbofan
Bombardier said the incident did not involve the PW1524 model of P&W's new geared turbofan
motor that powers the CSeries jet.
Pratt & Whitney's geared turbofan
jet engine will have significantly better fuel economy and much quieter operation.