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Pik Pik-5
The PIK-5 was a training glider produced in Finland in the 1940s, and 1950s, equipping the country's gliding clubs with an aircraft greater in performance than primary gliders but less than competition sailplanes. The aircraft had a pod-and-boom configuration, with a high, strut-braced monoplane wing and a cruciform tail carried at the end of a tailboom that extended from a position high on the aft end of the pod.
Designed by Kaarlo J. Temmes, the prototype was built by Polyteknikkojen Ilmailukerho and first flew in September 1946, and testing continued until it was badly damaged in a crash in summer 1948.
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. However, this aircraft, now known as the PIK-5B, was destroyed in a crash in summer 1951.
PIK 5b
Again, it was rebuilt with modifications, particularly to the wing structure, resulting in the PIK-5C version. This version first flew on 5 July 1952, and went on to become the pattern for 34 similar machines that would be built over the ensuing years.
Wingspan: 12.4 m (40 ft 8 in)
Wing area: 14.7 m2 (158 sq ft)
Airfoil: Göttingen 533
Aspect ratio: 10.4
Length: 6.4 m (21 ft 0 in)
Empty weight: 120 kg (265 lb)
Max takeoff weight: 210 kg (463 lb)
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)
Aerotow speed: 20 km/h (12.4 mph; 10.8 kn)
Winch launch speed: 90 km/h (55.9 mph; 48.6 kn)
Terminal velocity: with full air-brakes at max all-up weight 180 km/h (112 mph; 97 kn)
g limits: +4 -2
Maximum glide ratio: 18 at 60 km/h (37.3 mph; 32.4 kn)
Rate of sink: 0.85 m/s (167 ft/min) at 52 km/h (32.3 mph; 28.1 kn)
Wing loading: 14.3 kg/m2 (2.9 lb/sq ft)
Crew: 1
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