The McDonnell Douglas MD-12 was a four-engine, double deck, superjumbo airliner concept conceived in the early 1990s. Powered by 4 GE CF6-80C2 high-bypass turbofans, the MD-12 was designed to have a maximum capacity of 511 passengers in 3-class configuration, and a maximum range of 9,200 miles.

Although the concept received a fair amount of attention from the press, no orders were ever placed. The lack of interest from carriers coupled with mounting debt at McDonnell Douglas caused the MD-12 project to be scrapped.

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