O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Gotha WD 3
Built in July 1915, this aircraft was to the twin-boom formula with a central nacelle housing the 160 h.p. Mercedes engine and pusher airscrew. The observer sat in the extreme nose and was armed with a machine-gun; a radio transmitter was also installed. Only a single aircraft (Marine No. 259) was supplied. Engine, 160 h.p. Mercedes D III. Span, 15.6 m. (51 ft. 2 1/4 in.). Area, 54 sq.m. (583 sq.ft.). Weights: Empty, 1,105 kg. (2,431 lb.). Loaded, 1,710 kg. (3,762 lb.). Speed, 100 km.hr. (62.5 m.p.h.). Armament, one manually operated Parabellum machine-gun in nose.