Valmet L-70 Vinka
| L-70 Vinka | |
|---|---|
 | |
| Role | Trainer |
| Manufacturer | Valmet |
| First flight | 1 July 1975 |
| Introduction | 1980 |
| Status | Operational |
| Primary user | Finnish Air Force |
| Number built | 30 |
| Variants | Valmet L-80 Turbo-Vinha Valmet L-90 Redigo |
The Valmet L-70 Vinka is a Finnish-designed piston-powered military basic trainer aircraft of the 1970s. A production run of 30 aircraft were built for the Finnish Air Force, in the early 1980s, and although the type was not exported, it formed the basis of the turboprop-powered Aermacchi M-290 RediGO
Development and design
The Finnish state-owned manufacturing conglomerate Valmet Oy began design work in September 1970 on a replacement for the Saab Safirs then in use with the Finnish Air Force as basic trainers. Valmet received an order from the Finnish Air Force for further development of the LEKO-70 (Lentokone (Aeroplane) 1970) in March 1973.[1] The first prototype made its maiden flight from Halli Airport for the first time on 1 July 1975.[2]
The aircraft is a low-winged tractor monoplane of all metal construction and with a fixed nosewheel undercarriage. It is powered by a single 200 hp (149 kW) Lycoming O-360 flat-four piston engine driving a two bladed propeller. In its main training role, the pupil and instructor sit side-by-side under a large sliding canopy. An additional two seats or a stretcher and medical attendant can be carried for the liaison role, while the wings are fitted with four hardpoints for carrying of external stores.[3][4]
The Finnish Air Force placed an order for 30 aircraft, to be designated Vinka (Blast (of wind)) on 28 January 1977, with the aircraft to be built at Valmet's Kuorevesi plant.[5]
Operational history
The Vinka entered service on 13 October 1980[6] with deliveries continuing until 1982.[7] Finnish Air Force pilot trainees flew about 100 hours on the Vinka at the Air Academy at Kauhava before converting to the British Aerospace Hawk jet trainer.[7]
Valmet attempted to market the type internationally under the name L-70 Miltrainer, but no orders followed.
L-80 TP Turbo Vinha
After unsuccessfully having tried to market the L-70 Vinka for the export market, Valmet developed a turboprop version with a new wing and a retractable undercarriage. This aircraft was given the designation L-80 TP Turbotrainer. The prototype (OH-VBB), powered by a 360 shp (268 kW) Allison 250 turboprop engine, made its first flight on 12 February 1985, piloted by Paavo Janhunen.[8] The prototype was destroyed in an accident on 24 April that year, killing the pilot Paavo Janhunen and the flight observer.[9] The second prototype was baptized Valmet L-90 TP and it was used for the development of the L-90 Redigo or RediGo (Both spelling versions are found in the brochures from the manufacturer).
Operators
-
Finland - Finnish Air Force - 30 were built for the FiAF, 28 remain in service and are located at the Air Force Academy at Tikkakoski.
Specifications (L-70 Vinka)
Data from Jane's All The World's Aircraft 1982–83[4]
General characteristics
- Crew: Two, student and instructor
- Capacity: up to two additional passengers
- Length: 7.50 m (24 ft 7¼ in)
- Wingspan: 9.85 m (32 ft 3¾ in)
- Height: 3.31 m (10 ft 10¼ in)
- Wing area: 14.00 m² (150.7 ft²)
- Airfoil: NACA632A615 modified
- Aspect ratio: 6.93:1
- Empty weight: 767 kg (1,691 lb)
- Loaded weight: 1,050 kg (2,315 lb)
- Max. takeoff weight: 1,250 kg (2,756 lb)
- Powerplant: 1 × Lycoming AEIO-360-A1B6 air-cooled flat four, 149 kW (200 hp)
Performance
- Never exceed speed: 360 km/h (193 knots, 223 mph)
- Maximum speed: 240 km/h (129 knots, 149 mph) at sea level
- Cruise speed: 222 km/h (120 knots, 138 mph) at 1,525 m (5,000 ft) (75% power)
- Stall speed: 85 km/h (46 knots, 53 mph) (flaps down, power off)
- Range: 860 km (464 nmi, 534 miles) (maximum payload)
- Endurance: 4 hr 48 min
- Service ceiling: 5,000 m (16,400 ft)
- Rate of climb: 5.7 m/s (1,120 ft/min)
Armament
- Hardpoints: 4 underwing hardpoints with a capacity of
- Inner hardpoints: 150 kg (330 lb) each
- Outer hardpoints:100 kg (220 lb) each
- Maximum external load: 300 kg (660 lb)
See also
- Related development
- Aircraft of comparable role, configuration and era
References
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Wikimedia Commons has media related to Valmet L-70 Vinka. |
- Notes
- ↑ Air International December 1979, p. 266.
- ↑ Air International December 1979, p. 265.
- ↑ Air International December 1979, pp. 289–290.
- 1 2 Taylor 1982, pp. 48–49.
- ↑ Air International December 1979, pp. 265, 268.
- ↑ Air International February 1981, p. 73.
- 1 2 Green and Swanborough 1986, p. 114.
- ↑ Green and Swanborough 1986, pp. 114–117.
- ↑ Green and Swanborough May 1986, p. 117.
- Bibliography
- "A doughty Finnish wind...Vinka Enters Service". Air International. February 1981, Vol 20 No 2. pp. 73–74. ISSN 0306-5634.
- Green, William and Gordon Swanborough. "Valmet's Turbotrainer...A Northern Newcomer with Tradition". Air International. March 1986, Vol 30 No 3. pp. 111–117. ISSN 0306-5634.
- "A New Northerly Air Current...The Vinka From Valmet". Air International. December 1979, Vol 17 No 6. pp. 264–268, 289–290. ISSN 0306-5634.
- Taylor, John W. R. Jane's All The World's Aircraft 1982–83. London: Jane's Yearbooks, 1982. ISBN 0-7106-0748-2.