Miroslav Hajn

Miroslav Hajn (21 September 1894 in Žamberk, Austria-Hungary 6 September 1963 in Prague, Czechoslovakia) was a chief designer at ČKD-Praga, one of the largest engineering companies in the former Czechoslovakia and today's Czech Republic.[1]

Hajn was first a founder and chief designer at Avia, along with Pavel Beneš, in 1919. The two began repairing planes in a workshop within the complex of an old sugar factory in Prague.[2] One year later, they designed their first two-seater plane, the Avia BH-1. From 1923 to 1925, the two developed the Avia BH-7, BH-9, and BH-11 monoplanes, launching the era of biplane fighters. The BH-11 won the Coppa d' Italia prize. Three years later, their Avia BH-21 fighter was considered one of the world's best planes.[3]

In 1930, Hajn and Beneš came to ČKD-Praga. The first aircraft they designed was the Praga E-39 in 1931.[1]


  1. "Praga E-39 Czechoslovakia - Luftwaffe" (in German). fosvion.com. Retrieved 31 January 2009.
  2. "AVIA: History". AVIA. Retrieved 31 January 2009.
  3. "Aerospace Industry in the Czech Republic" (PDF). CzechInvest. Archived from the original (PDF) on 3 December 2008. Retrieved 31 January 2009.
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