The conception of the Pegasus engine in 1957 upset all the conventions of aircraft design. It was previously usual for aircraft designers to seek a suitable engine, but this was an engine that sought an aircraft. The aircraft that resulted was the famous Harrier that is still in front-line service with air forces around the world including the RAF and US Marine Corps. This book takes an in-depth look at the engine's original design concept, initial production and flight testing. It then goes on to explain how the developments and improvements have been made over the ensuing years and includes experiences of operational combat flying, both from land and sea. The book is written in a non technical style that makes comfortable reading for all enthusiasts and historians and is copiously illustrated with many previously unseen photographs and diagrams. AUTHOR: Andrew Dow worked in the aviation industry for Bristol Siddeley and then Rolls-Royce between 1962 and 1991. He was on the Pegasus team from 1975 to 1991. He was witness to, and participant in, many of the events related in this book. SELLING POINTS: * The most significant reference to this ground-breaking engine * The 50th Anniversary of the first engine run is on 2 September 09 * Contains a wealth of hitherto unseen photographs * Strong US sales since they are now the sole builder of the Harrier ILLUSTRATIONS 384 illustrations *