The Super Seventies were a great success: roughly 70% quieter than the 60-Series and, at the time of their introduction, the world's quietest four-engined airliner.
Os "Super Seventies" foron un grande éxito: eran un 70% máis silenciosos que a serie 60 e, cando se introduciu, era o avión de catro motores menos ruidoso do mundo.