Boeing Y1

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This article contains information about a scheduled or expected future product.
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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 "Replacement Study.")

New technologies expected to be introduced include composite aerostructures and more fuel-efficient turbofan engines (however, other engine types are being researched). Y1 is part of Boeing's Yellowstone project. The family is believed to be comprised of three (or possibly four) models which will seat 120, 150 and 190 in a two-class configuration. 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. It is widely expected that Y1 will feature a wider cabin than the Boeing 737 or the Airbus A320. Although at the present time (mid-2006) 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. Such technology may include geared turbofan engines under development by Pratt and Whitney. ^[1]

The Financial Times informed that Boeing would have formed a group to evaluate this concept. The group of key customers would include Southwest Airlines, Ryanair and Gol Transportes Aéreos.^{[citation needed]}

Competition for the Y1 is projected to come from the Airbus NSR (for "New Short-Range aircraft.")