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http://en.wikipedia.org/wiki/Hannover_CL.V

The Hannover CL.V was a ground attack aircraft built in Germany during World War I, which formed the basis for a sport aircraft following the war. Derived from the Hannover CL.II, the CL.V shared the same basic conventional biplane configuration and incorporated the overhanging, aerodynamically-balanced ailerons developed for the Hannover CL.III. The characteristic biplane tail used on earlier Hannover CL-class machines was dispensed with, and a conventional empennage was fitted to the prototype, although production machines reverted to the earlier design.

The CL.V was first tested in July 1918, which lead to an initial order from Idflieg for 20 aircraft powered by the Mercedes D.III engine for evaluation. Further orders followed for CL.Vs powered by the BMW.IIIa engine, which gave superior performance and were intended as dedicated two seat fighters. Only 46 were built before the end of the war, and none of them had been put into service by that time. Hannover built another 62 examples after the Armistice.

In its civil configuration, designated F.6, the aircraft dispensed entirely with the rear cockpit, and once again used the monoplane tail unit that had been fitted to the CL.V prototype. One stripped down example was used to set a world altitude record of 8,340 m (27,335 ft) on 22 October 1919.

In 1923, another 14 CL.Vs were produced for the Norwegian army air service by Kjeller. These were known as the Kjeller FF.7 Hauk ("Hawk") and remained in service until 1929.

Specifications (CL.V)

General characteristics

• Crew: Two, pilot and gunner
• Length: 7.00 m (23 ft 0 in)
• Wingspan: 10.56 m (34 ft 8 in)
• Height: 2.84 m (9 ft 3 in)
• Wing area: 28.5 m² (307 ft²)
• Empty weight: 720 kg (1,587 lb)
• Gross weight: 1,080 kg (2,380 lb)
• Powerplant: 1 × BMW IIIa, 138 kW (185 hp)

Performance

• Maximum speed: 185 km/h (115 mph)
• Endurance: 3 hours
• Service ceiling: 9,000 m (29,530 ft)
• Rate of climb: 5.0 m/s (990 ft/min)

Armament

• 2 × fixed, forward-firing 7.92 mm MG08 machine guns
• 1 × trainable, rearward-firing 7.92 mm Parabellum MG14 machine gun

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Published in July 2009.

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