LIBIS KB-6

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

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

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.