O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Junkers J 11 (CLS I)
Three machines (Nos. 7501-7503) which were literally seaplane versions of the CL I were delivered to the German Navy during 1918. Apart from the addition of a vertical fin to compensate the additional side area of the floats, the aircraft differed little from its landplane counterpart (apart from the obvious float chassis), although it was marginally larger in dimension. The tail surfaces were never really satisfactory, and after the war a completely new empennage was designed, when the type was used for civil purposes. Engine, 200 h.p. Benz. Span, 12.75 m. (41 ft. 10 in.). Length, 8.95 m. (29 ft. 4 3/8 in.). Height, 2.95 m. (9 ft. 8 1/8 in.). Weights: Empty, 914 kg. (2,011 lb.). Loaded, 1,420 kg. (3,124 lb.). Speed, 180 km.hr. (112.5 m.p.h.). Armament, twin Spandau and one Parabellum machineguns.