Rolandas Kalinauskas RK-5 Ruth
|Status||In production (2015)|
|Number built||at least one|
The Rolandas Kalinauskas RK-5 Ruth, also called the Viltis (English: hope), is a Lithuanian light aircraft, designed and produced by Rolandas Kalinauskas, of Prienai. The aircraft is supplied as a complete ready-to-fly-aircraft.
Design and development
The RK-5 is derived from the Rolandas Kalinauskas RK-3 Wind. The RK-5 features a strut-braced high wing, a four-seat enclosed cabin accessed via doors, fixed tricycle landing gear and a single engine in tractor configuration.
The aircraft fuselage is made from welded steel tubing supplemented by wooden stringers, while the wing is of wooden structure, all covered in doped aircraft fabric. The 11 m (36.1 ft) span wing has an area of 15.2 m2 (164 sq ft) and mounts flaps. The wing is supported by a single strut on each side with a single jury strut. The standard engine employed is the 140 hp (104 kW) Avia M 332 four-cylinder, inverted, air-cooled, supercharged, inline, four-stroke powerplant.
The aircraft has an empty weight of 450 kg (990 lb) and a gross weight of 900 kg (2,000 lb), giving a useful load of 450 kg (990 lb). It is supplied with a wide range of standard equipment, including leather seats and tinted windows.
- Crew: one
- Capacity: three passengers
- Wingspan: 11 m (36 ft 1 in)
- Wing area: 15.2 m2 (164 sq ft)
- Empty weight: 450 kg (992 lb)
- Gross weight: 900 kg (1,984 lb)
- Fuel capacity: 130 litres (29 imp gal; 34 US gal)
- Powerplant: 1 × Avia M 332 four cylinder, inverted, air-cooled, supercharged, inline four-stroke aircraft engine, 100 kW (140 hp)
- Propellers: 2-bladed wooden, electrically adjustable, 1.8 m (5 ft 11 in) diameter
- Maximum speed: 230 km/h (143 mph; 124 kn)
- Cruise speed: 195 km/h (121 mph; 105 kn)
- Stall speed: 62 km/h (39 mph; 33 kn)
- Rate of climb: 4 m/s (790 ft/min)
- Wing loading: 59.2 kg/m2 (12.1 lb/sq ft)
- Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 168. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
- Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 158. Flying Pages Europe SARL, 2015. ISSN 1368-485X
- Rolandas Kalinauskas (n.d.). "RK-5 "Ruth"". Retrieved 20 December 2012.