Boeing 7J7

The Boeing 7J7 was a proposed American short- to medium-range airliner of the 1980s, envisioned to carry up to 150 passengers as the successor to the Boeing 727. It grew out of the Seven Dash Seven 150-seat idea Boeing had considered since at least 1981; the J recalled the Japan Aircraft Development Corporation as a parts supplier, Scandinavian Airlines showed interest as a customer, and service entry was first planned for 1992. Its main idea was fuel efficiency through new technologies, including propfan engines mounted on the rear fuselage, which never went beyond prototype testing. Years of changing customer demands on size and layout delayed decisions, and the project was postponed and then quietly cancelled.