The 112-inch PW4000 series of high-bypass turbofan aircraft engines is Pratt & Whitney’s largest commercial engine, its diameter nearly as wide as the fuselage of a Boeing 737. Using hollow titanium, shroudless fan blades, the PW4000 provides high efficiency and low noise along with superb resistance to foreign object damage.
The 98,000-pound-thrust PW4098 currently powers the Boeing 777 up to 660,000 lbs take-off weight! Built as the successor to the JT9D series engines, it has found much wider application than its predecessor.
It has certified thrust from 86,760 to 99,040 lbf. It entered service in June 1995 with United Airlines, and was the first jet engine to enter service with 180-minute ETOPS certification. ETOPS is an acronym for Extended range Twin Operations. This rule allows twin-engined
airliners such as the Boeing 777 to fly long-distance routes that were previously off-limits to twin-engined aircraft. There are different levels of ETOPS certification, each allowing aircraft to fly on routes that are a certain amount of single-engine flying time away from the nearest suitable airport.
It can power all the 777 versions except the 300ER and 200LR.
The PW4000 features advanced technology materials and Full Authority Digital Engine Control (FADEC), for good fuel economy and reliability.
Type: Two spool high bypass ratio Turbofan
Length: 163.1 inches
Diameter: 112 inches
Compressor: 1 stage fan, 5 stage low pressure compressor, 15 stage (5 variable) high pressure compressor
Turbine: 2 stage high pressure turbine, 5 stage low pressure turbine