| MD-12 | |
|---|---|
 A computer rendering of the proposed MD-12, a full double-decker configuration concept | |
| General information | |
| Type | Double-decker wide-body aircraft |
| National origin | United States |
| Manufacturer | McDonnell Douglas |
| Status | Design study, canceled |
The McDonnell Douglas MD-12 was a large wide-body airliner concept planned by the McDonnell Douglas company in the 1990s. It was first conceived as a trijet larger than the MD-11, then stretched to a quadjet airliner. It was to be similar in size to the Boeing 747, but with greater passenger capacity through two full-length passenger decks. However, the MD-12 received no orders and was canceled. McDonnell Douglas then studied larger MD-11 derivatives named MD-XX without proceeding.