Engineering:Valmet L-80 Turbo-Vinha

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L-80
Role Trainer
Manufacturer Valmet
First flight 12 February 1985
Introduction 1983
Retired 1990
Status cancelled
Number built one L-80, two L-90 prototypes

The Valmet L-80 TP Turbo-Vinha was a prototype for a new Finland turboprop basic trainer aircraft. The aircraft, which carried the registration OH-VBB, first flew on 12 February 1985.[1] It was destroyed in a crash on 24 April 1985, during its 14th flight, killing the test pilot Paavo Janhunen. The aircraft was a further development of the Valmet L-70 Vinka and would eventually lead to the Valmet L-90 Redigo.

The Allison turboprop engine was used in the second aircraft, the L-80 TP Turbo-Vinha (OH-VTM) which was destroyed during an aerial display in Belgium. The third of the series (OH-VTP) got the new name Redigo or RediGo (used in sales brochures).

Specifications (L-80 TP)

Data from Valmet's Turbotrainer,[2] Jane's All the World's Aircraft 1984–85[3]

General characteristics

  • Crew: 1 or 2
  • Capacity: up to 3[4]
  • Length: 7.88 m (25 ft 10 in)
  • Wingspan: 10.25 m (33 ft 8 in)
  • Height: 3.3 m (10 ft 10 in)
  • Wing area: 14.00 m2 (150.7 sq ft)
  • Aspect ratio: 7
  • Airfoil: root: NACA NACA 63-218(mod B3); tip: NACA 63-412(mod B3)[5]
  • Empty weight: 840 kg (1,852 lb) equipped
  • Max takeoff weight: 1,800 kg (3,968 lb) (and Max landing weight)
  • Fuel capacity: 350 L (92 US gal; 77 imp gal) / 280 kg (617 lb)
  • Powerplant: 1 × Allison 250-B17D turboprop engine, 268 kW (359 hp)
  • Propellers: 3-bladed Hartzell, 2.19 m (7 ft 2 in) diameter constant-speed propeller

Performance

  • Maximum speed: 350 km/h (220 mph, 190 kn) at 3,000 m (9,800 ft)
  • Stall speed: 110 km/h (68 mph, 59 kn) idle, flaps up
99 km/h (62 mph; 53 kn) idle, flaps down
  • Never exceed speed: 460 km/h (290 mph, 250 kn)
  • Range: 1,550 km (960 mi, 840 nmi) max fuel, no reserve
  • Service ceiling: 7,500 m (24,600 ft) +
  • Rate of climb: 10.49 m/s (2,065 ft/min)
  • Power/mass: 0.15 kW/kg (0.091 hp/lb)
  • Take-off distance to 15 m (49 ft): 345 m (1,132 ft)
  • Landing distance from 15 m (49 ft): 350 m (1,150 ft)

Armament

  • Hardpoints: 4 with a capacity of Maximum 600 kg (1,323 lb) ; inboard pylons 250 kg (551 lb) ; outboard pylons 150 kg (331 lb),with provisions to carry combinations of:
    • Rockets: 37mm or 68 mm rocket pods
    • Missiles: anti-helicopter missiles
    • Bombs: 250 kg (551 lb) bombs
    • Other: various machine-gun pods, flares searchlight pods

See also

Related development

  • Valmet L-70
  • Valmet L-90

References

  1. ↑ Taylor, John W.R., ed (1985). Jane's All the World's Aircraft 1985-86 (76th ed.). London: Jane's Publishing Co.. p. 50. ISBN 0-7106-0821-7. https://archive.org/details/janesfightingshi8586shar/page/50/mode/1up. 
  2. ↑ Green and Swanborough 1986, p. 113.
  3. ↑ Taylor, John W.R., ed (1984). Jane's All the World's Aircraft 1984–85 (75th ed.). London: Jane's Publishing Co.. p. 50. ISBN 0-7106-0801-2. https://archive.org/details/janesallworldsai8485john. 
  4. ↑ Green and Swanborough 1986, p. 117.
  5. ↑ Lednicer, David. "The Incomplete Guide to Airfoil Usage". https://m-selig.ae.illinois.edu/ads/aircraft.html. 

Further reading

  • 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.



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