CFM56 - what next?

Interavia;  July 1, 2007 ;     700+ words ......requirements ... whatever they may be. A propfan-style open rotor solution is one of the options receiving serious...solutions like double counter-rotating fans and open rotors. Planaud confirms that the latter solution...the rest," he says, "will be new." Increased bypass ratio All the ...

EasyJet says new design will slash CO2 emissions in half ; BUSINESS

The Independent - London;  June 15, 2007 ;     489 words ......manufacturers. The ecoJet would have two "open rotor" engines set on a wide tail fin, wings...was already working on the design of open rotor engines. However, Robert Culleymore...years ahead of schedule. The company said open rotor engines would reduce emissions by 25...

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...

Cumberland plugs the gaps left by CMG pull-out. (Reclamation).(Brief...

British Plastics & Rubber;  November 1, 2001 ;     465 words ......mm. They have a slant cut three-knife open rotor, and two counter-slanted bed knives with...optional rotor design that combines the open rotor concept with the advantages of staggered knife cutting. The staggered, offset, open rotor uses wedge-held cassette knives. The...

The turbofan of tomorrow.

Mechanical Engineering-CIME;  August 1, 1990 ;     700+ words ......air around and through the engine. The bypass ratio is the ratio of air passing through...are required to make a 10:1 to 20:1 bypass ratio advanced ducted engine a reality. Pratt...stages. For example, a geared fan with a bypass ratio of 14:1 can be driven by a three-stage...

Pratt & Whitney's surprise leap

Interavia;  June 1, 1998 ;     700+ words ......having a gear-driven fan and a higher bypass ratio than any current engine ( I , versus...30dB below current rules and the high bypass ratio boosts propulsive efficiency and reduces...but it is not an ADP. It has a lower bypass ratio and a higher fan pressure ratio, which...

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

Interavia Business & Technology;  June 1, 1998 ;     700+ words ......having a gear-driven fan and a higher bypass ratio than any current engine (11:1, versus...30dB below current rules - and the high bypass ratio boosts propulsive efficiency and reduces...but it is not an ADP. It has a lower bypass ratio and a higher fan pressure ratio, which...

Options match granulators to most applications.(reclamation & recycling)

British Plastics & Rubber;  November 1, 2007 ;     462 words ......be turned four times before they have to be replaced. The open rotor is recommended for soft energy absorbing materials to provide...thermal degradation or melting of the material. The slanted open rotor moving knives combined with two inclined fixed knives provides...

New airplane engines include something old and something new. (high-thrust...

R & D;  June 1, 1990 ;     627 words ......operation. The PW4000 has a pressure ratio of 31.5:1 and a bypass ratio of 5:1 in its present 60,000-lb thrust form. The first version...thrust and will have a pressure ratio of 45 to 50:1 and a bypass ratio of almost 10:1. This is well above the company's current...