Koser KB-3 Jadran
The Koser KB-3 Jadran was a Yugoslavian amphibious sailplane. It was designed by Jaroslav Koser, a student at the Ljubljana Technical Faculty (Tehniška fakulteta v Ljubljani) of the University of Ljubljana and was a development of his earlier Koser-Hrovat KB-1 Triglav design.[1][2][3]
| Jadran | |
|---|---|
| Role | Amphibious sailplane |
| National origin | Yugoslavia |
| Manufacturer | Branko Ivanus |
| Designer | Jaroslav Koser |
| First flight | 1949-50 |
Design and development
Specifications
Data from The World's sailplanes[2]
General characteristics
- Crew: one
- Wingspan: 15.0 m (49 ft 3 in)
- Wing area: 13.25 m2 (142.6 sq ft)
- Aspect ratio: 17
- Airfoil: Göttingen Gö 549
- Empty weight: 195 kg (430 lb)
- Gross weight: 280 kg (617 lb) maximum
Performance
- Maximum speed: 200 km/h (120 mph, 110 kn) placard
- Maximum glide ratio: 25 at 75 km/h (47 mph; 40 kn)
- Rate of sink: 0.75 m/s (148 ft/min) minimum, 60 km/h (37 mph; 32 kn)
- Aerotow maximum speed: 150 km/h (93 mph; 81 kn)
References
- Organisation Scientifique et Technique Internationale de Vol a Voile3 eme Congres Internationale Orebro. Sweden. 1950, by rd. August Raspet. Engineering Research Station, Mississippi State College
- Wilkinson, K.G.; Brooks, Peter; Shenstone, B.S. (1958). The World's Sailplanes - Die Segelflugzeuge der Welt - Les Planeurs de le Monde (in English, German, and French). I. Organisation Scientifique et Technique International de Vol à Voile (OSTIV) & Schweizer Aero-Revue. pp. 196–200.
- KB-3 Jadran
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