Pratt & Whitney's surprise leap. (starts design of PW8000 engine)(Turf...

Interavia Business & Technology;  June 1, 1998 ;     700+ words ......a gear-driven fan and a higher bypass ratio than any current engine (11:1...compromise in engine design. The fan's tip speed cannot go much above 450 m/sec...in pursuit of more thrust, the tip speed limit means an ever lower rotational...W is talking about a 300 m/sec tip ...

Deere mowing deck improvements.(TOOLS & EQUIPMENT)

SportsTURF;  January 1, 2006 ;     110 words ......Deere has introduced its 7-Iron II deck that offers an increased blade tip speed, spindle pocket reinforcements, and double captured anti-scalp wheels. The higher blade tip speed allows operators to mow at higher ground speeds without sacrificing...

CFM56--what next? All options are open, as GE and Snecma prepare the...

Interavia Business & Technology;  June 22, 2007 ;     700+ words ......rest, he says, will be new. Increased bypass ratio All the studies that have been performed...programme point to the need for a greater bypass ratio: greater than 10 for a traditional turbofan...open rotor architecture. The higher the bypass ratio, the better the efficiency. Also, ...

CFM56 - what next?

Interavia;  July 1, 2007 ;     700+ words ......he says, "will be new." Increased bypass ratio All the studies that have been performed...programme point to the need for a greater bypass ratio: greater than 10 for a traditional turbofan...open rotor architecture. The higher the bypass ratio, the better the efficiency. Also, the...

Dispersion Advantages.

Nanoparticle News;  January 1, 2006 ;     315 words ......and tested at different stirrer speeds. Tests with a stirrer tip speed of 13 meters per second revealed that although the desired...and avoid structural deterioration. Subsequent tests with a tip speed of 4 meters per second demonstrated that better dispersion...

New fans for new RJs.(regional jets)(Brief Article)(Statistical Data...

Interavia Business & Technology;  April 1, 2001 ;     700+ words ......turbine, a fan diameter of 46.2in, a bypass ratio of 5 and a pressure ratio of 28. GE...blades and a three-stage booster, a bypass ratio of 5 and pressure ratio of 29. The compressor...2inch wide chord, damperless fan, and a bypass ratio of 4.2. The engine features a simple...

PRATT & WHITNEY; JT9D MARKS 25 YEARS OF SERVICE

PR Newswire;  January 19, 1995 ;     303 words ......was the first commercial turbo fan with a high bypass ratio. The engine's fan diameter of 92 inches was equal...the length of the whole engine. This provided a bypass ratio of five-to-one; five times as much air passed around...

New fans for new RJs

Interavia;  April 1, 2001 ;     700+ words ......turbine, a fan diameter of 46.2in, a bypass ratio of 5 and a pressure ratio of 28. GE...blades and a three-stage booster, a bypass ratio of 5 and pressure ratio of 29. The compressor...2inch wide chord, damperless fan, and a bypass ratio of 4.2. The engine features a simple...

Old heads oversee new design. (retired experts in product development)

Mechanical Engineering-CIME;  February 1, 1992 ;     700+ words ......five-year development program that will put a 10:1 bypass ratio turbofan engine into the air by 1995. To help...Its 123-inchdiameter fan will provide a 10:1 bypass ratio, compared with a bypass ratio of 5:1 for today's engines. Moving in Together...

P&W gears up for engine offensive

Interavia;  March 1, 1998 ;     440 words ......breaks new ground in having a gear-driven fan and a higher bypass ratio than any current engine (11:1, versus 9:1 for the GE90...in the early 1990s, but it is not an ADP. It has a lower bypass ratio and a higher fan pressure ratio, which eliminates the need...

Battlespace 2000 in big engines.(aircraft engine market...

Interavia Business & Technology;  September 1, 1999 ;     700+ words ......PW4000 (94-inch fan), which has a bypass ratio of 5:1 and a fan pressure ratio of 1.80:1, the PW8000's bypass ratio is doubled, at 10:1, and the fan...of today's engines. However with a bypass ratio of 10:1 the PW8000's fan speed will...

Battlespace 2000 in big engines

Interavia;  September 1, 1999 ;     700+ words ......PW4000 (94-inch fan), which has a bypass ratio of 5:1 and a fan pressure ratio of 1.80:1, the PW8000's bypass ratio is doubled, at 10:1, and the fan...of today's engines. However with a bypass ratio of 10:1 the PW8000's fan speed will...

Roskamp-champion HM hammermill.(FEED MANUFACTURING EQUIPMENT)

Feed & Grain;  December 1, 2005 ;     31 words ...* High-efficiency hammermills grind friable or fibrous materials [ILLUSTRATION OMITTED] * Patented regrind chamber * HM54 Series offers 1,800-rpm tip speed INDICATE 34 ON INQUIRY CARD OR REPLY ONLINE

Roskamp-champion HM hammermill.(Product Spotlight: Feed Manufacturing...

Feed & Grain;  October 1, 2005 ;     31 words ...* High-efficiency hammermills grind friable or fibrous materials [ILLUSTRATION OMITTED] * Patented regrind chamber * HM54 Series offers 1,800-rpm tip speed INDICATE 37 ON INQUIRY CARD OR REPLY ONLINE

The turbofan of tomorrow.

Mechanical Engineering-CIME;  August 1, 1990 ;     700+ words ......to design an ultrahigh bypass turbofan engine, known...through the engine. The bypass ratio is the ratio of air passing...to make a 10:1 to 20:1 bypass ratio advanced ducted engine...designer to select the fan tip speed for lowest noise and highest...example, a geared fan with ...