Aerion chief technology officer and director Dr. Richard Tracy told AIN today at EBACE that his company is “revisiting” the powerplant for its proposed $80 million supersonic business jet (SSBJ), citing the previously selected Pratt & Whitney JT8D-219’s inability to meet upcoming Stage 5 noise requirements.
Pratt & Whitney JT8D
Korean Air has selected the Pratt & Whitney PW4170 Advantage70 engine to power five new Airbus A330-200s. Valued at some $200 million, the firm deal covers 10 engines.
Pratt & Whitney offers the Advantage70 as both a new engine and as an upgrade kit for existing PW4168 engines. The upgrade includes a suite of technology enhancements Pratt & Whitney can incorporate during engine overhauls, and promises a 2-percent thrust increase, more than 1-percent reduction in fuel burn, increased durability and lower maintenance costs.
Asiana Airlines has selected Pratt & Whitney’s fleet management program for three of its P&W-powered Boeing 777s, the engine manufacturer announced here at the Singapore Airshow. Eagle Services Asia, Pratt & Whitney Global Service Partners’ engine overhaul facility in Singapore, will be responsible for the six-year agreement, which provides for the maintenance of six PW4090 turbofans that power the aircraft.
Northrop Grumman is hoping that funds to re-engine the first two operational E-8C JSTARS radar surveillance aircraft will be provided in the Fiscal 2013 budget next year. The test bed aircraft is now flying with JT8D-219 engines that Northrop Grumman has modified with a new pneumatic system that it claims “vastly improves reliability and the hardware’s life cycle.” Although the JT8D is hardly new technology, the 17 operational E-8Cs are powered by even older JT3Ds. A $1.7 billion program to replace them was started some years ago, and the test bed first flew with JT8Ds in December 2008.
Pratt & Whitney this spring held a media event at its Hartford, Connecticut headquarters and provided an overview of its milestones and advances in environmental cleanliness and so on. Some samples:
The in-development geared turbofan (GTF) has been attracting most of the headlines at engine manufacturer Pratt & Whitney lately, and it does indeed promise to make a large leap in powerplant efficiency and environmental friendliness when it enters airline service in 2013.
The European Commission (EC) has issued revised noise proposals that abandon its earlier demands for a blanket ban on hush-kitted aircraft with mtow of more than 75,000 lb using any airports in the 15-state European Union (EU) after this coming April. But the new draft directive, published on November 28, leaves open the possibility of a limited number of individual airports being able to exclude or restrict “marginal Stage 3” aircraft.
Pratt & Whitney has installed the first JT8D-200 series QuietEagle noise reduction system on a VIP McDonnell Douglas MD-87. The system, which includes a 16-lobe internal mixer, exhaust muffler, tabbed nozzle and improved front fan case, is said to bring JT8D-200s into compliance with FAR Part 36 Stage 4 and ICAO Annex 16 Chapter 4 noise standards.
Aerion, the U.S. company seeking to attract risk-sharing partners for a proposed supersonic business jet, has announced a number of design changes that it said are necessary to achieve weight and performance targets.
A new Pratt & Whitney noise-reduction kit will permit operators of McDonnell Douglas MD-80 twinjets to meet Chapter 4 International Civil Aviation Organization noise rules that are scheduled for introduction in six months’ time. The heavyweight version of the equipment comprises an improved fan-inlet liner, a 16-lobe exhaust mixer, a muffler and a tabbed nozzle.
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