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Eiri-Avion PIK-20

The PIK-20 sailplane was designed at the Helsinki University of Technology by Pekka Tammi, with advice from Ilkka Rantasalo and Raimo Nurminen. The prototype first flew on 10 October 1973. It was produced initially by Molino Oy who were taken over by Eiri-Avion Oy between 1974 and 1980. Later, production was taken over by the French company, Siren SA, under the name Siren PIK-20.

Variants
;PIK 20 Prototype and initial production version. 400 kg gross weight. Retrofit of PIK-20B flap-aileron interconnect permitted under a service bulletin. Retrofit of PIK-20B enlarged water ballast bags and corresponding 450 kg gross weight permitted under a service bulletin. ;PIK 20B Refined standard class sailplane with interconnected flaps and ailerons. Gross weight increased to 450 kg. ;PIK 20E The self-launching PIK-20E is similar to the D model, but has a retractable Rotax 501 that takes 15 turns of a manual crank in the cockpit to deploy or retract. The fuselage is slightly different, with a slight sweep-back of the wings and the tailplane is larger. The modifications to turn the PIK-20 into a motorglider were designed by Jukka Tervamäki and the prototype first flew on 2 October 1976 as the Tervamäki JT-6 ;PIK 20E II F Designation for PIK 20Es produced by Siren S.A. in France. ==Specifications (PIK-20D) ==
Source: Wikipedia ↗
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