Four-engine commercial jets like the legendary jumbo Boeing 747 and superjumbo Airbus A380 have largely been phased out in favor of more efficient twin-engine widebodies. Yet, there are some cases ...

From the 1970s through the 1990s, tri-jets were a common sight in our skies. Aircraft with three jet engines were capable of transoceanic flights and more fuel-efficient than four-engine aircraft like ...