L-1011 Tristar TWATWA L 1011 airplane model. Development of the L 1011 prototype commenced in early 1969, culminating in its maiden flight on November 16, 1970. The selection of Rolls Royce's advanced RB211 three shaft engine design initially plagued the TriStar's early career. Rolls Royce faced bankruptcy in February 1970, primarily due to escalating RB211 development costs, which significantly impacted both Lockheed and the TriStar's sales. The issues were eventually