This Sikorsky S.29A masqueraded as a Gotha bomber in the film Hell’s Angels, flown by Roscoe Turner. The photographs were taken at Oakland Airport, California in 1928. The S.29A was a passenger aircraft that doubled as a heavy bomber. It was powered by two 400 h.p. Liberty engines and had a maximum speed of 111 m.p.h. It could climb to 5,000ft in just under nine minutes.