O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Rumpler 6A 2
This experimental two-seater of August 1916 was intended as a two-seat fighter. Early in 1917 normal struts were substituted for the original X struts and strengthened wings fitted. At a later date the machine was fitted with a geared 8 cylinder Mercedes. However, excessive vibration problems arose and the experiment was abandoned. Engine, 160 h.p. Mercedes D III. Span, 10.20 m. (33 fl. 4 5/8 in.). Loaded weight, 1,260 kg. (2,772 lb.).
W.Green, G.Swanborough The Complete Book of Fighters
RUMPLER 6A 2 Germany
In May 1916, the Rumpler Flugzeug-Werke initiated flight test of a tandem two-seat reconnaissance fighter referred to by the company designation 6A 2 (the first digit indicating the year, the letter indicating the aircraft category and the second digit signifying the design sequence in that category and year). Whereas all preceding Rumpler biplanes had featured two-bay wing cellules, the 6A 2 broke new ground in being of single-bay configuration with Y-type interplane struts. Of mixed construction with plywood and fabric skinning, it was initially powered by a 160 hp Mercedes D III six-cylinder water-cooled engine with Stimkuhler radiator beneath the wing centre section and a ‘‘rhino horn” exhaust pipe. Proposed armament comprised a synchronised 7,9-mm LMG 08/15 machine gun and a swivelling Parabellum in the rear cockpit. At an early phase in flight development some strengthening of the wings was undertaken and more orthodox paired struts substituted, and, subsequently, the 6A 2 was fitted with a geared eight-cylinder Mercedes D IV engine of 220 hp. Excessive vibration led to discontinuation of the flight test programme, the type being overtaken by the more innovative 7C 1.
Loaded weight, 2,778 lb (1260 kg).
Span, 33 ft 5 1/2 in (10,20 m).