Part Two—Spey By‐Pass Turbojet Engine: Description of the Design Background and Technical Features of the Rolls‐Royce RB.I63 Power Plant Available to Purchase

INITIALLY developed to power the new generation of British short and medium range jet airliners, the Rolls‐Royce Spey is a 10,000 lb. thrust by‐pass engine designed for operational economy—low fuel consumption, low maintenance costs and a long overhaul life.