The story of the Royal Aircraft Factory at Farnborough, forerunner of the World's premier aeronautical research establishment wherein were designed a diversity of aircraft including many of those that equipped the RFC, RNAS and RAF during the First World War. Originally established to build observation balloons for the Victorian British Army, the Factory later expanded to employ over 3500 people by mid-1916, at which time it became the subject of a political controversy that ended in a judicial enquiry. In 1918 its title was changed to the Royal Aircraft Establishment, not only to avoid a clash of initials with the newly formed Royal Air Force but to better define its changing role. Each of the many designs for airships and aeroplanes that were produced by the Factory between 1908 and 1918 is described in detail, illustrated by photographs, and with three-view drawings provided for the more prominent designs.