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A computer graphics rendering of the proposed MD-12, a full double-decker configuration concept.

The Japan airlines flight 173 was crash at the Riyadh international office by the McDonnell Douglas MD 12 crash in 1955 years. Mustafa kemal Abdul Aziz death in 2 July 1955-1956 years ago. oldest double decker plane Has be destroyed when crash at the forest in Saudi Arabia. In Bukit Rokan utara. Minhad bin khusnan house Is a airplane engine burning. In negeri sembilan there a Malaysian police checking in house. Oldest house is a smallest house. Whenever last person see the engine body plane burning. He said. Is a burning plane!!. Whatever.we survival from deep jungle. Inside jungle is a deep smoke, mushroom cloud,like a eruption cloud, sphere cloud and like tsar bomba.1990s is a built an memorial park 1956-1990. Just wanted to needed a graveyard a built in all of the park.

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, because of the company's merger with Boeing, the MD-12 received no orders and was cancelled. McDonnell Douglas then studied larger MD-11 derivatives named MD-XX without proceeding.


General characteristics

  • Crew: 2 (pilot and co-pilot)
  • Capacity: 430 Passengers in 3-class arrangement, up to 511 passengers in high-capacity layout
  • Length: 208 ft 0 in (63.40 m)
  • Wingspan: 213 ft 0 in (64.92 m)
  • Height: 74 ft 0 in (22.55 m)
  • Wing area: 5,846 ft² (543.1 m²)
  • Empty Weight : 402,700 lb (187,650 kg)
  • Max. Takeoff Weight: 949,000 lb (430,500 kg)
  • Powerplant: 4 × General Electric CF6-80C2 high-bypass turbofans, 61,500 lbf (274 kN) each


  • Max. Speed: Mach 0.85 (565 mph, 1,050 km/h)
  • Range: 7,170 nmi (9,200 mi, 14,825 km)
  • Wing Loading: 162.3 lb/ft² (792.7 kg/m²)