On 13 September 1931 The Schneider Trophy Was Won Outright For Britain On Southampton Water By Flt Lt John Boothman Flying Supermarine S6B, S1595, With A Record Breaking Average Speed Of 379.08mph In Supermarine Rolls Royce S6B Owners Workshop Manual, Ralph Pegram Relates The Story Of The Schneider Trophy Competitions And Describes The Development Of British High Speed Seaplane Designs He Examines The Anatomy Of The S6B Including The Rolls Royce R Engine , As Well As Giving Rare Insights Into Its Flying Characteristics And How It Was Maintained, Operated And Of Course Raced In The Final Competition.