Spey Power Plant: A Description of the Rolls‐Royce Spey By‐Pass Turbojet Engine, Its Development History, Installation, Fire Protection, Ice Protection and Starting System

IN short‐ and medium‐haul operation an aero engine is subjected to a greater frequency of full‐power cycles; these operations therefore impose more exacting conditions on an engine than docs long‐haul service. For this reason, it is important to appreciate that in designing the Spey, Rolls‐Royce has been able to call on 14 million hours of experience with short‐ to medium‐haul operation.