LIBIS KB-6

KB-6 Matajur
General information
Type	Two-seat light basic trainer and touring aircraft
Manufacturer	LIBIS aircraft (Letalski Inštitut Branko Ivanuš Slovenija)
Designer	Dušan Cener
Status	Retired
Primary user	Slovenian aero clubs
History
First flight	4 June 1952

The LIBIS KB-6 Matajur was a 1950s Slovenian two-seat light monoplane designed and produced by LIBIS aircraft during Yugoslavian period.

Design and development

The aircraft design office of LIBIS brought together teachers and students of the Ljubljana technical high school. The design office designed the KB-6 Matajur which was a two-seat light trainer and tourer that first flew on 4 June 1952. The KB-6 was a cantilever low-wing monoplane with fixed tailwheel landing gear and an enclosed cockpit with side-by-side seating and dual controls. The aircraft was produced for use in aero-clubs until the mid-1960s.

Variants

KB-6 Matajur

Main production variant, powered by a 135 hp (101 kW) Regnier 4L.00 inline engine.

KB-6T Matajur-Trised

Three-seat development powered by a 160 hp (120 kW) Walter Minor 6-III-J inline engine, eight built.

LIBIS 160

Further developed version of the KB-6T with swept vertical tail, 11 built.

Specifications (KB-6)

Data from Jane's All The World's Aircraft 1953-54

General characteristics

• Crew: 2
• Length: 8.36 m (27 ft 5 in)
• Wingspan: 10.60 m (34 ft 9 in)
• Height: 2.15 m (7 ft 1 in)
• Wing area: 14.0 m² (151 sq ft)
• Aspect ratio: 8:1
• Empty weight: 659 kg (1,453 lb)
• Gross weight: 979 kg (2,158 lb)
• Fuel capacity: 141 L (37 US gal; 31 imp gal)
• Powerplant: 1 × Régnier 4L.00 inverted four-cylinder air-cooled inline piston engine, 101 kW (135 hp)
• Propellers: 2-bladed fixed pitch wooden propeller, 1.95 m (6 ft 5 in) diameter

Performance

• Maximum speed: 222 km/h (138 mph, 120 kn) at sea level
• Cruise speed: 200 km/h (120 mph, 110 kn)
• Stall speed: 88 km/h (55 mph, 48 kn) (flaps down)
• Range: 820 km (510 mi, 440 nmi)
• Service ceiling: 4,500 m (14,800 ft)
• Rate of climb: 3.50 m/s (689 ft/min)

References

• The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
• Bridgman, Leonard, ed. (1953). Jane's All The World's Aircraft 1953-54. London: Jane's.
• Taylor, John W R (1964). Jane's All the World's Aircraft 1964-65. London: Sampson Low, Marston & Co. Ltd.