PIK-13

PIK-13
General information
Type	Competition sailplane
National origin	Finland
Manufacturer	Polyteknikkojen Ilmailukerho
Number built	1
History
First flight	1954

The PIK-13 was a sailplane constructed in Finland to compete in the 1954 World Gliding Championships, ^[1] held at Camphill Farm, Great Hucklow, UK. ^[2] It was a conventional mid-wing design of "workmanlike" construction ^[3] and underwent five test flights in the course of 1954 before its entry in the competition. ^[4]

In the championships, the PIK-13 was flown by Antti Koskisen, ^{[2] [5] [6]} who was placed 16th with 931 points. ^[7] The PIK-13 was destroyed in an accident on 26 March 1956 when the control stick broke in flight. ^[4] Pilot Jorma Jalkanen parachuted to safety. ^[4]

Specifications

Data from Jane's all the World's Aircraft 1955-56 ^[8]

General characteristics

• Length: 7.3 m (23 ft 11 in)
• Wingspan: 17.6 m (57 ft 9 in)
• Height: 1.55 m (5 ft 1 in)
• Wing area: 14.6 m² (157 sq ft)
• Aspect ratio: 21
• Airfoil: root:Göttingen 549, tip:Göttingen 693
• Empty weight: 197 kg (434 lb)
• Gross weight: 300 kg (661 lb)

Performance

• Never exceed speed: 250 km/h (160 mph, 130 kn)
  
• Auto-tow maximum speed:115 km/h (71 mph; 62 kn)
• Aero-tow maximum speed:130 km/h (81 mph; 70 kn)
• g limits: +8
• Maximum glide ratio: 33:1 at 85 km/h (53 mph; 46 kn)
• Rate of sink: 0.7 m/s (140 ft/min) at 62 km/h (39 mph; 33 kn)
• Wing loading: 20.5 kg/m² (4.2 lb/sq ft)

Notes

1. Taylor 1989, p.726
2. "World Gliding Championships" 1954, p.250
3. "Sailplanes seen at Camphill" 1954, p.3
4. "PIK-sarjan lentokoneet
5. Yates 1954, p.74
6. Wiggin 1954, p.5
7. The Lashan Newsletter No 23, 1954, editorial
8. Bridgman, Leonard (1955). Jane's all the World's Aircraft 1955-56. London: Jane's all the World's Aircraft Publishing Co. Ltd.

References

• "Editorial" (PDF). The Lasham Newsletter (23). Lasham: Lasham Gliding: 1–2. August 1954. Retrieved 2009-01-11.^{[ dead link ]}
• "PIK-sarjan lentokoneet". Polyteknikkojen Ilmailukerho website. Retrieved 2009-01-11.
• "Sailplanes seen at Camphill" (PDF). The Lasham Newsletter (23). Lasham: Lasham Gliding: 2–3. August 1954. Retrieved 2009-01-11.^{[ dead link ]}
• "Suomalaisia purjelentokoneita". Ilmailu (11): 26. 1959.
• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
• Wiggin, Barney L. (November–December 1954). "The World Contest" (PDF). Soaring: 2–9. Archived from the original (PDF) on 2006-10-02. Retrieved 2009-01-11.
• "World Gliding Championships". Flight : 250. 26 February 1954. Retrieved 2009-01-11.
• Yates, Alan (16 July 1954). "Great Hucklow Prospects". Flight : 73–74. Retrieved 2009-01-11.