iscover
The climax of a four-year development programme was reached on April 29 when the US FAA formally awarded certification to the Pratt & Whitney PW4084, one of three engine options on the Boeing 777. During the testing phase of the programme, development PW4084s accumulated more than 2,500 running hours, including 76 hours and 23 test flights installed onboard a 747 testbed (this aircraft was in fact the first 747 built, and was pictured on p7 of our March '94 issue). PW4084s powered the first 777 on its first flight in early June. The PW4084 is the largest and most powerful member of the PW4000 family, which recently surpassed 10 million hours of service. In service aboard Airbus A300s and A310s, Boeing 767s and 747s, and the McDonnell Douglas MD-11, it will soon also be certificated as the PW4168 for the A330. Since the original PW4000's first flight in June 1987 (aboard a Pan Am A310), the PW4000 has flown 3.2 billion kilometres, the equivalent of ten return trips to the sun. (Pratt & Whitney)
Newsdesk – Commercial Aviation
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Commercial
Avro Forecasts Growth:
Avro International Aerospace, makers of the RJ (formerly BAe 146) family of regional jets, has forecast the world market will need nearly 3000 new jet aircraft in the 65-120 seat range over the next 20 years. Avro’s prediction is based on the assumption that worldwide passenger traffic will grow by an average 5% per annum, from 2022 billion revenue passenger kilometres (RPKs) in 1993 to 5450 billion by 2013. Avro says that many trends influencing the air transport industry today will provide opportunities for the growth of the regional aircraft market: larger airlines operating from hub airports will need more regional services to feed them; regional routes themselves are growing in their own right; and congestion at major hubs will stimulate traffic growth at smaller airports, resulting in hub bypassing. North America will remain the largest market for regional jet aircraft, says Avro, accounting for 42% of the world total. The next most important markets will be Europe (21%) and AsiaPacific (15%).
Most Powerful Enginecertificated:
The Pratt & Whitney PW4084 has become the mostpowerful engine in the world to begranted certification, following recentclearance from the US FAA. The 80,000lb (358.4kN) PW4084’s first application is the Boeing 777, flight testing of which began in early June. Five 777s powered by PW4084s will log more than 3200 hours and 2300 flight cycles over the coming 12 months, including flights over some of the routes on which the 777 will be used by launch customer United Airlines. P&W and Boeing are aiming ambitiously for 180 minutes E TOPS approval of the 777 as soon as it enters service, bypassing the usual inservice proving period before this is granted. The PW4084’s certification follows a test programme involving 2500 hours and 6000 flight cycles including 23 test flights installed on a Boeing 7 4 7 test bed.
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