В пяти экземплярах с двигателем Майбах (245 л. с.) был выпущен высотный Ганновер CL IV, отличавшийся увеличенными размерами.
O.Thetford, P.Gray German Aircraft of the First World War (Putnam)
Hannover C IV
Completed early in 1918, the C IV was Hannover's first standard two-seater design. It utilised the 245 h.p. Maybach engine to achieve high-altitude performance, but as this aircraft was no improvement on the Rumpler, it did not go into production. Although fuselage construction was similar to that of the earlier CL series, the singular "I" style interplane and centre-section strut arrangement is of interest. Possibly two prototypes were constructed. The straight-edged patee crosses with their unusually wide outline, on the machine illustrated, were unique. Engine: 245 h.p. Maybach Mb IV. Span, 12.56 m. (41 ft. 2 1/2 in.). Length, 7.8 (25 ft. 7 1/8 in.). Area, 33.6 sq.m. (363 sq.ft.). Weights: Empty, 960 kg. (2,112 lb.). Loaded, 1,395 kg. (3,069 lb.). Speed, 160 km.hr. (100 m.p.h.) at 2,000 m. (6,560 ft.). Climb, 1,000 m. (3,280 ft.) in 4.5 min. Ceiling 9,000 m. (29,520 ft.). Duration, 3 hr. Armament, one Parabellum and one Spandau machine-gun.
Hannover CL V
Hawa produced the CL V late in 1918 in two variants: the first with the characteristic biplane tail and the second with an orthodox empennage. Some fifty airframes were thought to have been completed by the Armistice. Engine, 185 h.p. B.M.W. IIIa. Span, 10.56 m. (34 ft. 7 3/4 in.), biplane tail; 10.49 m. (34 ft. 5 in.), mono tail. Length, 7.1 m. (23 ft. 3 5/8 in.), height, 2.9 m. (9 ft. 6 1/4 in.). Area, 28.5 sq.m. (308 sq.ft.). Weights: Empty, 720 kg. (1,584 lb.). Loaded, 1,080 kg. (2,376 lb.). Speed, 185 km.hr. (115.625 m.p.h.) at 2,000 m. (6,560 ft.). Climb, 1,000 m. (3,280 ft.) in 3.3 min. Ceiling, 9,000 m. (29,520 ft.). Duration, ca. 3 hr. Armament, one Parabellum and one Spandau machine-gun.
W.Green, G.Swanborough The Complete Book of Fighters
HANNOVER CL V Germany
In mid-1918, the Idflieg prepared a specification calling for a Jagdzweisitzer - a two-seat fighter intended to engage the newer Allied single-seaters on even terms. It was to emphasise high speed, diving capability and manoeuvrability, and carry a fixed forward-firing armament of twin synchronised machine guns plus a third gun in the rear cockpit. To meet this requirement, which called for the aircraft to be tested to single-seat fighter load requirements, Hermann Dorner produced an extremely rugged and compact airframe. Designated CL V, the prototype was powered by a 186 hp BMW IIIa engine. Tested against a similarly-powered Fokker D VII, it demonstrated comparable speed and climb. With the original biplane tail replaced by one of monoplane configuration, the CL V was ordered into production, a contract for 100 aircraft being placed in September 1918, although it is doubtful if any of the 46 completed before the end of hostilities reached the Front. A further 62 were completed after the Armistice. A stripped down example of the CL V was used to establish a world altitude record of 27,362 ft (8 340 m) on 22 November 1919. During 1923-24, the Kjeller Flyvemaskinsfabrik at Halden, Norway, built 14 CL Vs under licence for the Norwegian Army as the F.F.7 Hauk(Hawk), these remaining in service until 1929.
Max speed, 109 mph (175 km/h) at 6,560 ft (2 000 m).
Time to 9,840 ft (3 000 m), 12 min.
Range, 211 mis (340 km).
Empty weight, 1,587 lb (720 kg).
Loaded weight, 2,381 lb (1080 kg).
Span, 34 ft 5 in (10,49 m).
Length, 22 ft 11 1/2 in (7,00 m).
Height, 9 ft 3 1/4 in (2,84 m).
Wing area, 306.78 sq ft (28,50 m2).