A graph showing the passenger capacity of Boeing's existing civil aircraft compared to Yellowstone.

The Boeing Yellowstone Project was a Boeing Commercial Airplanes project to replace its entire civil aircraft portfolio with advanced technology aircraft. New technologies to be introduced include composite aerostructures, more electrical systems (instead of hydraulic systems), and more fuel-efficient turbofan engines (such as the Pratt & Whitney PW1000G, General Electric GEnx, the CFM International CFM56, and the Rolls-Royce Trent 1000). The term "Yellowstone" refers to the technologies, while "Y1" through "Y3" refer to the actual aircraft.[1]

The first of these projects, Y2, entered service as the Boeing 787. The second project, Y3, is expected to enter service as the Boeing 777X. The Y1 project was cancelled in favor of the re-engined Boeing 737 MAX.

Yellowstone projects

Yellowstone is divided into three projects:

See also


  1. ^ "Boeing Y-class Yellowstone". GlobalSecurity.org. Retrieved 13 May 2012.
  2. ^ "Boeing firms up 737 replacement studies by appointing team"". FlightGlobal. March 3, 2006.
  3. ^ "Weight-Optimizing Internally Pressurized Composite-Body Aircraft Fuselages Having Near-Elliptical Cross Sections". ip.com, August 12, 2010.
  4. ^ Ostrower, John (September 24, 2010). "Boeing patent may provide glimpse into 737 replacement plan". FlightGlobal. Archived from the original on October 6, 2014.
  5. ^ Sanders, Peter; Cameron, Doug (January 26, 2011). "Boeing Says 787 Still Profitable, Eyes 737 Revamp". The Wall Street Journal.
  6. ^ Ostrower, Jon (February 10, 2011). "Boeing boss green-lights all-new next generation narrowbody". FlightGlobal.
  7. ^ "Boeing Launches 737 New Engine Family with Commitments for 496 Airplanes from Five Airlines" (Press release). Boeing. August 30, 2011.
  8. ^ Norris, Guy (February 7, 2006). "THE 737 STORY: Smoke and mirrors obscure 737 and Airbus A320 replacement studies". FlightGlobal.
  9. ^ Norris, Guy (January 7, 2003). "Sonic Cruiser is dead - long live Super Efficient?". FlightGlobal.