The
Lockheed L-1011 TriStar, commonly referred to as the
L-1011 (pronounced "L-ten-eleven") or
TriStar, is a medium-to-long-range,
wide-body trijet airliner. It was the third widebody airliner to enter commercial operations, after the
Boeing 747 and the
McDonnell Douglas DC-10. The aircraft has a seating capacity of up to 400 passengers and a range of over . Its trijet configuration places one
Rolls-Royce RB211 engine under each wing, with a third, center-mounted RB211 engine with an
S-duct air inlet embedded in the tail and the upper
fuselage. The aircraft has an
autoland capability, an automated descent control system, and available lower deck
galley and lounge facilities.