Tags: Aircraft.
The McDonnell Douglas MD-12 was an aircraft design study undertaken by the McDonnell Douglas company in the 1990s for a superjumbo aircraft first conceived as a larger trijet then stretched to a 4-engine airliner. It was to be similar in size to the Boeing 747 but with more passenger capacity. However the MD-12 received no orders and was canceled. McDonnell Douglas then studied larger MD-11 derivatives named MD-XX without proceeding.