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FIRST OF POWERFUL NEW JET ENGINES COMPLETED BY PRATT & WHITNEY

 FIRST OF POWERFUL NEW JET ENGINES COMPLETED BY PRATT & WHITNEY
 EAST HARTFORD, Conn., July 1 /PRNewswire/ -- With the final turn of a torque wrench, Pratt & Whitney today officially completed the most powerful jet engine ever built for commercial aviation.
 In a traditional "Last Bolt" ceremony, Pratt & Whitney President James G. O'Connor and representatives of Boeing, United Airlines and All Nippon Airways of Japan tightened the last bolt on the first PW4084 engine, capable of producing 90,000 pounds of thrust. This powerplant has been selected by United and ANA to power their new Boeing 777 airplanes which begin service in 1995.
 The new engine model will be certified for 84,000 pounds of thrust and tested at levels of up to 90,000 pounds. The most powerful engines in airline service today produce about 62,000 pounds of thrust.
 A single PW4084 engine has enough thrust to power two Boeing 737s. The fuselage of a Boeing 727 could fit inside the engine's nacelle, or housing, on the 777 wing.
 The new engine mode is a growth version of the PW4000 engine that has been in service since 1987 and produces between 50,000 and 62,000 pounds of thrust. That engine has been selected by airlines around the world to power the Boeing 767 and 747-400 aircraft, the Airbus A300 and A310 and the McDonnell Douglas MD-11.
 All versions of the PW4000 use a common core: high-pressure compressor, combustor and high-pressure turbine. Modifications are made to the low-pressure compressor and low-pressure turbine to allow increasingly larger fans to provide the increased thrust.
 The PW4084 has a 112-inch diameter fan at the front of the engine. The current production engine has a 94-inch diameter fan. The first growth model, the PW4168, has a 100-inch fan and will enter service in 1994 on the Airbus A330.
 The latest engine is the result of a partnership between Pratt & Whitney, Boeing, United and ANA, as well as other airlines that may acquire the engine.
 Boeing and Pratt & Whitney have linked their computer design systems so teams working in Seattle and East Hartford can work simultaneously. Much of the blueprint and mockup phase has been eliminated as engineers work together through computer networks.
 Also, Boeing and Pratt & Whitney engineers sit in on each company's design meetings. Representatives of United and All Nippon also work with these teams to assure all viewpoints and technical considerations are addressed early in the design process.
 The PW8084 is also a global engine. Pratt & Whitney's partners around the world contribute their expertise to its success. Partners include MTU of Germany, Mitsubishi and Kawasaki of Japan, Samsung of Korea, Singapore Technologies, Norsk Jetmotor of Norway and Fiat if Italy.
 So far some 60 airlines have ordered more than 2,800 firm and option PW4000 engines. Almost 900 have been delivered and they are approaching 4 million hours of service since first flying in 1987.
 The first new PW4084 will be joined by seven others in the next few months for a rigorous ground- and flight-testing program where the reliability and performance of the engine will be tested to the utmost. Certification by the Federal Aviation Administration is planned for April 1994 with entry into service in June 1995.
 Although the engine will be formally certified at 84,000 pounds of thrust, many tests will be run at a 90,000-pound thrust rating. It is anticipated this rating will be needed for future models of the 777 and the super-jumbo jets being discussed by all aircraft manufacturers. With an even larger fan run through a fan drive-gear system...the so- called Advanced Ducted Prop concept...the PW4084 could achieve over 100,000 pounds of thrust by the turn of the century. Later this year Pratt & Whitney will run a technology demonstrator of an ADP powerplant.
 Pratt & Whitney pioneered jet power for commercial aviation, providing engines for the Boeing 707 and McDonnell Douglas DC-8. Its JT8D engine, of which more than 12,000 have been built, powers the Boeing 727 and 737 and the McDonnell Douglas DC-9 and MD-80. The JT9D engine began the jumbo jet era when it was selected for the first Boeing 747s. Well over 3,000 of that model are in service around the world today.
 Besides the PW4000 family of engines, the latest generation of large commercial engines to carry the Pratt & Whitney eagle logo includes the PW2000 for the Boeing 757 and Air Force C-17 transport, as well as the V2500 engine used on the Airbus A320 and A321 and the new McDonnell Douglas MD-90.
 Pratt & Whitney is a unit of United Technologies Corporation (NYSE: UTX) of Hartford.
 -0- 7/1/92
 /CONTACT: Mark Sullivan of Pratt & Whitney, 203-565-4415/
 (UTX) CO: Pratt & Whitney ST: Connecticut IN: ARO SU:


CN -- NE008 -- 5648 07/01/92 11:28 EDT
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Publication:PR Newswire
Date:Jul 1, 1992
Words:800
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