SAI KZ I

The SAI KZ I was a sport aircraft built in Denmark in 1937, the first aircraft built by the Kramme & Zeuthen firm.

KZ I
KZ I replica in Danmarks Flymuseum
Role	Sport aircraft
National origin	Denmark
Manufacturer	Skandinavisk Aero Industri
Designer	Viggo Kramme and Karl Gustav Zeuthen
First flight	24 February 1937
Number built	1

Design and development

The KZ I was a low-wing cantilever monoplane of conventional design, with fixed tailwheel undercarriage and an open cockpit with a single seat. Construction throughout was of wood.

Only a single KZ I was constructed, and it disappeared during the course of World War II. During the 1970s, a flying replica was built, with work started by Gunnar Fjord Christensen in 1972 and sold to the Danmarks Flymuseum in 1977. The completed aircraft, powered by a more powerful but heavier 50 hp (37 kW), 1.5 L (92 cu in) Volkswagen flat-four engine, flew for the first time on 20 November 1988 and in 2008 remains part of the museum's collection.

Specifications

Data from Danmarks Flymuseum : KZ I.^[1]

General characteristics

• Crew: 1
• Wingspan: 7.2 m (23 ft 7 in)
• Wing area: 8.4 m² (90 sq ft)
• Airfoil: root: NACA 23018; tip: NACA 23009^[2]
• Empty weight: 192 kg (423 lb)
• Gross weight: 325 kg (717 lb)
• Powerplant: 1 × ABC Scorpion two cylinder air-cooled horizontally-opposed piston engine, 28 kW (38 hp)
• Propellers: 2-bladed fixed-pitch propeller

Performance

• Maximum speed: 180 km/h (110 mph, 97 kn)
  
• Landing speed: 60 km/h (37 mph; 32 kn)
• Cruise speed: 160 km/h (99 mph, 86 kn)
• Service ceiling: 5,000 m (16,000 ft)