An attempt was made to cross the Atlantic in a Sopwith Atlantic biplane by Com. Mackenzie Grieve and Maj. Harry Hawker on 18 May 1919. This plane generally followed the design of Sopwith warplanes, and had a 46 feet wingspan and was 31 feet long, weighing 6000 pounds fully equipped for flight. It was supposed to have a flight duration of 25 hours at 100 miles an hour, and was driven by a Rolls-Royce engine developing 375 horse power, at 1800 RPM. A 4-bladed propeller was used, geared down to 1281 revolutions. Continue reading















