L-1011-250 Tristar is a mid-range passenger aircraft developed by the American company Lockheed.
The long-range variant of Tristar, but with fewer seats, the L-1011-500 entered service in 1979. Having begun the retrofitting of some aircraft of the previous series, designated L-1011-250, Lockheed created a real competitor DC-10-30 not only in range but also incapacity. The L-1011-250 was first offered to airlines as such but was subsequently redone from the base model by bringing the maximum take-off weight to 231.3t and the fuel reserve to 119741 liters. The aircraft has an increased flight range and can fly from the west coast of the United States to London, being a competitor to the DC-10-30 aircraft not only in range, like L-1011-500, but also in the payload. Converted six aircraft for the American company Delta. The first aircraft was converted in November – December 1986 and the last in April 1988.
- Modification: L-1011-250
- Wingspan, m: 47.34
- Aircraft Length, m: 54.17
- The height of the aircraft, m: 16.87
- Wing Area, m2: 321.00
- Weight kg: empty aircraft 113500; maximum take-off 231500
- Fuel, l: 119570
- Engine type: 3 turbofan engine Rolls-Royce RB211-524B4
- Thrust, kgs: 3 x 22700
- Cruising speed, km / h: 973
- Practical range, km: 10000
- Range with maximum load, km: 8890
- Practical ceiling, m: 12800
- Crew: 3-4
- Payload: 211 passengers in a cabin of two classes or 400 passengers with a maximum of 39900 kg of cargo.