A centerline mounted overbalanced multiple main jet engine configuration. The
multiple
jet engines are centerline mounted rather than parallel offset. While each jet
engine is a "main" engine, capable of safely operating the aircraft in the event
of a failure of the other engines, the engines are overbalanced in the sense that
at least one of the main engines has substantially greater thrust than the other
main engines. All of the main engines operate at critical periods of flight, but
only one or the other of the main engines operates at other periods. The configuration
of this invention combines the efficiency and performance of a single engined aircraft
with enhanced safety advantages.