Posted on 08/28/2009 3:29:33 PM PDT by Ernest_at_the_Beach
Thanks SpaceBar
10. Pratt & Whitney's next leap in engine technology
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Top 15 Technologies
10. Pratt & Whitney's next leap in engine technology
An engine meant to set new standards for reliability, operating cost, fuel burn, and noise levels for the 21st century is under development by Pratt & Whitney (pratt-whitney.com). "The PW8000 geared turbofan is the next leap in engine technology," said Pratt & Whitney president Karl J. Krapek. "This engine, an extension of our PW6000 family, reduces operating costs as much as 10%, reduces fuel burn 9%, cuts noise levels significantly, and boosts reliability by eliminating more than half the airfoils in the compressor and turbine sections."
The gearbox for the PW8000 geared turbofan has run for 1000 h in Pratt & Whitney test stands and for 100 hours on a full-scale engine.
The geared turbofan represents more than 10 years of research and over $350 million in development costs by Pratt & Whitney. The engine's fan, which produces most of the thrust, is driven through a reduction gearbox, rather than being directly connected to the rest of the engine. "The gearbox between the fan and low-pressure compressor and turbine allows us to select the best possible operating speed for each engine section," said Krapek. "Each runs much more efficiently, allowing us to reduce the number of engine stages and parts."
The jet engine is divided into high and low spools, consisting of a compressor and a turbine. The 17-in., 32,000-shp gearbox enables the fan and low spool to operate at different speeds. The low spool drives the fan and gives an engine its propulsive power.
While this is not news to those of us who have been paying attention and are concerned about our liberty, I am afraid that the collective response from most Americans will be one big yawn. That scares me!
From NBC's standpoint, who cares about its low ratings and lack of advertising dollars when your parent company stands to profit handsomely from the cap-and-trade scheme.
Excellent!
What a shame. I was planning on buying another GE refrigerator to replace my old GE side by side with the door in door. Anyone recommend a good, reliable refrigerator manufacturer?
Read the book many years ago, but thanks for the info.
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