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Kramme & Zeuthen KZ.II

SAI / Skandinavisk Aero KZ.II

SAI-KZ-2-1
KZ II Kupé in Danmarks Flymuseum

 

Designed by Viggo Kramme and Karl Gustav Zeuthen, the SAI KZ II was a sport aircraft built in Denmark in 1937, produced by Skandinavisk Aero Industri in three major versions before and after the Second World War. First flown on 11 December 1937, in its original form, designated the Kupé (Danish: "Coupé") it was a low-wing cantilever monoplane of conventional design with fixed tailwheel undercarriage and two seats side-by-side under an enclosed canopy. the fuselage structure was of steel tube, skinned in plywood and fabric, and the wings were wooden with plywood covering and could be folded back along the fuselage for transport and storage.

This was followed by the aerobatic KZ II Sport with a revised fuselage design, placing the two seats in separate open cockpits in tandem, and a dedicated military trainer version along the same lines, the KZ II Træner ("Trainer"). The Danish Navy ordered four KZ II Sport, but these were confiscated by Germany before delivery.

 

SAI-KZ-2-2

 

This latter type was first produced in 1946, as a step towards rebuilding Denmark's air force after the war. They remained in service until 1955, when nine examples were sold into private hands. A total of forty-five were built.

In 2008, an example of each variant (including the sole extant KZ II Sport) is preserved in the Danmarks Flymuseum.

 

Variants:

KZ II Kupé - original version with enclosed canopy, side-by-side seating and de Havilland Gipsy Minor or Cirrus Minor engine (14 built)

KZ II Sport - aerobatic version with tandem seating in open cockpits and Hirth HM 504 engine (16 built)

KZ II Træner - military trainer version similar to KZ II Sport with de Havilland Gipsy Major engine (15 built)

 

SAI-KZ-2-3

 

Specifications:

KZ II Træner
Engine: 1 × de Havilland Gipsy Major, 108 kW (145 hp)
Wingspan: 10.20 m (33 ft 6 in)
Wing area: 15.0 sq.m (161 sq.ft)
Empty weight: 550 kg (1,210 lb)
Gross weight: 850 kg (1,870 lb)
Maximum speed: 220 km/h (140 mph)
Range: 650 km (410 miles)
Service ceiling: 5,000 m (16,400 ft)
Crew: Two, pilot and instructor

 

 

 

 

 

 

 


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