Articulo de referencia

PIK-5

The PIK-5 was a training glider produced in Finland in the 1940s, and 1950s, [ 1 ] equipping the country's gliding clubs with an aircraft greater in performance than primary gli...

The PIK-5 was a training glider produced in Finland in the 1940s, and 1950s,[1] equipping the country's gliding clubs with an aircraft greater in performance than primary gliders but less than competition sailplanes.[2]

The PIK-5 had a pod-and-boom configuration, with a high, strut-bracedmonoplanewing and a cruciform tail carried at the end of a tail boom that extended from a position high on the aft end of the pod.[3]

History

The prototype first flew in September 1946,[4] and testing continued until it was badly damaged in a crash in summer 1948[5] Over the subsequent months, the wings were repaired, and a new fuselage constructed to a revised design. This was completed the following winter, and flights recommenced.[5] However, this aircraft, now known as the PIK-5B, was destroyed in a crash in summer 1951.[5]

Again, it was rebuilt with modifications, particularly to the wing structure, resulting in the PIK-5C version.[5] This version first flew on 5 July 1952,[5] and went on to become the pattern for around 30 similar machines that would be built over the ensuing years.[4]

Variants

  • PIK-5
  • PIK 5A
  • PIK-5B
  • PIK-5C

Specifications (PIK-5C)

Data from Karhulan Ilmailukerho website : PIK-5c Cumulus (OH-151),[6] The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II[7]

General characteristics

  • Crew: 1
  • Length: 6.4 m (21 ft 0 in)
  • Wingspan: 12.4 m (40 ft 8 in)
  • Wing area: 14.7 m2 (158 sq ft)
  • Aspect ratio: 10.4
  • Airfoil: Göttingen 533
  • Empty weight: 120 kg (265 lb)
  • Max takeoff weight: 210 kg (463 lb)

Performance

  • Stall speed: 45 km/h (28 mph, 24 kn)
  • Never exceed speed: 190 km/h (120 mph, 100 kn)
  • Rough air speed max: 120 km/h (74.6 mph; 64.8 kn)
  • Velocidad de remolque aéreo: 20  km/h (12,4  mph; 10,8  nudos)
  • Velocidad de lanzamiento del cabrestante: 90  km/h (55,9  mph; 48,6  nudos)
  • Velocidad terminal: con frenos aerodinámicos completos y peso máximo total 180  km/h (112  mph; 97  nudos)
  • límites de g: +4 -2
  • Relación de planeo máxima: 18 a 60  km/h (37,3  mph; 32,4  nudos)
  • Velocidad de hundimiento: 0,85  m/s (167  pies/min) a 52  km/h (32,3  mph; 28,1  nudos)
  • Carga alar: 14,3  kg/m² ( 2,9  lb/  pie²)

Notas

  1. Taylor 1989, pág. 726
  2. Hardy 1982, pág. 74
  3. "PIK-sarjan lentokoneet"
  4. 1 2 "PIK-5c Cúmulo (OH-151)"
  5. 1 2 3 4 5 Tiusanen 1952, pág. 12
  6. «Cúmulo PIK-5c (OH-151)» . Sitio web de Karhulan Ilmailukerho . Consultado el 9 de enero de 2009 .
  7. ^ Shenstone, BS; KG Wilkinson (1963). Los planeadores del mundo: Die Segelflugzeuge der Welt: Les Planeurs du Monde Volumen II (en inglés, francés y alemán) (1ª ed.). Zurich: Organización Scientifique et Technique Internationale du Vol a Voile (OSTIV) y Schweizer Aero-Revue. págs. 180-191 .  

Referencias

  • Shenstone, BS; KG Wilkinson (1963). Los planeadores del mundo: Die Segelflugzeuge der Welt: Les Planeurs du Monde Volumen II (en inglés, francés y alemán) (1ª  ed.). Zurich: Organización Scientifique et Technique Internationale du Vol a Voile (OSTIV) y Schweizer Aero-Revue. págs. 180-191 . 
  • Hardy, Michael (1982). Planeadores y veleros del mundo . Shepperton: Ian Allan.
  • "Cúmulo PIK-5c (OH-151)" . Sitio web de Karhulan Ilmailukerho . Consultado el 9 de enero de 2009 .
  • "PIK-sarjan lentokoneet" . Sitio web de Polyteknikkojen Ilmailukerho . Consultado el 8 de enero de 2009 .
  • Taylor, Michael JH (1989). Enciclopedia de aviación de Jane . Londres: Studio Editions.
  • Tiusanen, Keijo (1952). "PIK-5c". Ilmailu (9): 12.