Bristol Siddeley, with its principal factory at Filton, near Bristol, had a strong base in military engines, including the Olympus, Viper, Pegasus (vectored thrust) and Orpheus.
Bristol Siddeley, coa súa fábrica principal en Filton preto da Bristol, tiña unha gran experiencia en motores militares, incluíndo o Olympus, Viper, Pegasus (empuxe vectorial) e Orpheus.