Juhani Heinonen, who designed at Valmet and then Finnair, produced HK-1 single-seater 1954 (flown non-stop from Madrid in 17 hr) and HK-2 2-seater 1963.

Aircraft

HK-1 ‘Keltiäinen’; 1954; Number built: 3; Versions: 2; Photo
HK-2 ‘Valkuainen’; 1963; Number built: 1; Photo