The O.K.15 was a 1950s Austrian two-seat light aircraft, the first aircraft designed in Austria for 20 years. Designed by Otto Kauba and built at the SGP factory at Wiener Neustadt the O.K.15 was a low-wing monoplane powered by a Walter Minor III piston engine. First flown on 16 July 1956 it was estimated at the time to have a cruise speed of 124 mph.
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Oeffag O.K.15 Wikipedia(Text) CC BY-SA