The Lockheed L-1011 TriStar is a wide-body commercial aircraft that was introduced in the early 1970s. Designed for medium to long-haul flights, it features a distinctive T-tail and three engines, with two mounted on the wings and one at the rear. The TriStar was known for its advanced technology, including a fully automated flight control system and a spacious cabin layout. The aircraft was primarily used by airlines for passenger transport and was capable of carrying around 250 to 300 passengers, depending on the configuration. Despite its innovative design, the L-1011 faced stiff competition from other aircraft like the Boeing 747 and the McDonnell Douglas DC-10, leading to a limited production run.