The McDonnell Douglas MD-12 was an all-new double-deck, four-engined ultra-large airliner design that could seat 430 to 511 passengers. The aircraft length was 208 feet (63 meters) and the wingspan was 213 feet (64.5 meters), with a fuselage 24 feet 3 inches (7.4 meters) high and nearly 28 feet (8.5 meters) wide. The design was unveiled in April 1992 with First Flight targeted for late 1995 and customer delivery in 1997. MDC was unable to find enough customer interest in the $5.5 billion project and it was cancelled without receiving any orders.