- Civil Air Department RG-1 Rohini
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RG-1 Rohini Role Training sailplane National origin India Manufacturer Veegal Engines and Engineering/Hindustan Aeronautics Limited Designer S Ramamritham First flight 10 May 1961 The Civil Air Department RG-1 Rohini is an Indian two-seat training sailplane of the 1960s. A high-winged wooden monoplane, with side-by-side seating;at least 107 were built.
Contents
Development and design
The Technical Centre of the Indian Civil Air Department is its research and development arm, and started design and production of sailplanes in 1950. In the early 1960s S Ramamritham designed a two-seat training sailplane, the RG-1 Rohini, the first of four prototypes flying on 10 May 1961.[1] The Rohini is a monoplane of wooden construction, with a braced high wing and a low mounted tail positioned forward of the fin. Its crew of two sit side by side in an open cockpit, while the aircraft's undercarriage consists of a single unsprung wheel under the fuselage, with skids under the nose and tail.[2]
A total of 17 Rohinis were built by Veegal Engines and Engineering of Calcutta, with Hindustan Aeronautics Limited building a further 86 RG-1s by 1971.[2]
Specifications (RG-1 Rohini)
Data from Jane's All The World's Aircraft 1971-72[2]
General characteristics
- Crew: 2
- Length: 8.17 m (26 ft 10 in)
- Wingspan: 16.56 m (54 ft 4 in)
- Height: 2.33 m (7 ft 8 in)
- Wing area: 20.76 m2 (223.5 sq ft)
- Aspect ratio: 13.2:1
- Airfoil: NACA 4418 at root, NACA 4412 (modified) at tip
- Empty weight: 300 kg (661 lb)
- Max takeoff weight: 490 kg (1,080 lb)
Performance
- Maximum speed: 174 km/h (108 mph; 94 kn)
- Stall speed: 48 km/h (30 mph; 26 kn)
- Maximum glide ratio: 22:1 at 77 km/h (42 kts,48 mph)
- Rate of sink: 0.86 m/s (169 ft/min)
Notes
References
- Taylor, John W. R. Jane's All The World's Aircraft 1969-70. London: Jane's Yearbooks, 1969.
- Taylor, John W. R. Jane's All The World's Aircraft 1971-72. London:Jane's Yearbooks, 1971. ISBN 0-354-00094-2
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