URMV-3 IS-2
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| IS-2 | |
|---|---|
| General information | |
| Type | Sailplane |
| National origin | Romania |
| Manufacturer | URMV-3[1] |
| Designer | |
| History | |
| First flight | 14 August 1950 [1] |
The IS-2 was an intermediate training glider designed by Iosif Şilimon and built in Romania in the 1950s at the URMV-3 (Rom: Uzinele de Reparatii Material Volant-3 - Glider repair and manufacture factory) factory at Brașov.[1]
The IS-2 was designed as an intermediate training glider. Construction was largely of wood with fabric and plywood skinning, similar o the Grunau Baby pre-war German glider.[1] Very little is known of the IS-2s development or operational history. Of conventional configuration with high-set cantilever wings and cruciform tail-unit, the IS-2 was also flown with an increased span wing.[2]
Specifications (IS-2)
Data from The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II[2]
General characteristics
- Crew: 1
- Length: 6.54 m (21 ft 5 in)
- Wingspan: 12.3 m (40 ft 4 in)
- Height: 1.05 m (3 ft 5 in) at cockpit
- Wing area: 14.7 m2 (158 sq ft)
- Aspect ratio: 10.3
- Airfoil: Root:Göttingen 535, Mid Göttingen 535, Tip Göttingen 676
- Empty weight: 152 kg (335 lb)
- Gross weight: 250 kg (551 lb)
Performance
- Stall speed: 42 km/h (26 mph, 23 kn)
- Never exceed speed: 180 km/h (110 mph, 97 kn) *Rough air speed max: 130 km/h (81 mph; 70 kn)
- Aerotow speed: 110 km/h (68 mph; 59 kn)
- Winch launch speed: 80 km/h (50 mph; 43 kn)
- Terminal velocity: with full air-brakes at max all-up weight 180 km/h (112 mph; 97 kn)
- g limits: +4 -2.2 at 185 km/h (99.9 kn)
- Maximum glide ratio: 20 at 69 km/h (43 mph; 37 kn)
- Rate of sink: 0.77 m/s (152 ft/min) at 32.9 mph; 28.6 kn (53 km/h)
- Wing loading: 17 kg/m2 (3.5 lb/sq ft)