Boeing Y1

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This article contains information about a scheduled or anticipated future aircraft. It may contain preliminary or speculative information, and may not reflect the final version of the aircraft.

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Y1 is a Boeing Commercial Airplanes project to replace the 737-700, 737-800, 737-900 and 757-200 product lines. It may also replace the 717 and 737-600 lines. The Y1 is also known as the 737RS (for "737 Replacement Study.") ^[1]

[edit] Development

Y1 is part of Boeing's Yellowstone project. It will be an entirely new aircraft rather than a further 737 derivative and will use much of the systems, structural and design technology of the 787. New technologies expected to be introduced include composite aerostructures and more fuel-efficient turbofan engines (however, other engine types are being researched). It is expected that Y1 will feature a wider cabin than the Boeing 737 or the Airbus A320, possibly even using a twin-aisle design. Although at the present time the available information is scarce, preliminary studies seem to indicate that any cost advantage over existing models will be marginal until newer engine technology is available.

[edit] Engines

CFM International is currently proposing a new engine as a successor to the CFM International CFM56 family, currently known as the LEAP56.^[2]

International Aero Engines has not yet made any proposals for a new engine, however IAE shareholders Rolls-Royce and Pratt & Whitney are currently studying their own designs for future engines for the Y1 and Airbus NSR. Pratt and Whitney is proposing to use geared turbofan technology for the Y1 and NSR, while Rolls-Royce is proposing a three-spool turbofan.^[3] Neither manufacturer has announced a decision on whether they intend to produce their engines alone, or as part of the IAE joint venture.

[edit] Current status

The family may comprise of direct replacements of the existing 737 models, however Boeing is also investigating the possibility of two different types with different fuselage and wing sections - one in the ~100 seat market and the other in the ~200 seat market.^[4]

Airbus is also studying an all-new short-range aircraft, dubbed the Airbus NSR, which would compete directly with the Y1.^[3]

[edit] See also

• Boeing Yellowstone Project
  

Related development

• Boeing 787
  

[edit] References

[edit] External links

• Not if... but when. Flight International. July 6, 2005.
• The 737 Story: Smoke and mirrors obscure 737 and Airbus A320 replacement studies. Flight International. February 7, 2006.
• Boeing firms up 737 replacement studies by appointing team Flight International. March 3, 2006.
• Clean engines, wings that fold: Boeing dreams of futuristic jets The Seattle Times. May 18, 2006.
• Boeing studies idea of two planes to replace 737 Reuters, at USA Today. September 13, 2006.