Beneš first was a founder and chief designer at Avia, along with Miroslav Hajn, in 1919. The two began repairing planes in a workshop within the complex of an old sugar factory in Prague. One year later, they designed their first two-seater plane: the Avia BH-1. From 1923 to 1925, the two developed the 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 BH-21 fighter was considered one of the world's best planes.
- "Pavel Beneš: konstruktér a zakladatel firmy Avia Více". euro.e15.cz (in Czech). 28 February 2010. Retrieved 7 May 2014.
- "Praga E-39 Czechoslovakia - Luftwaffe" (in German). fosvion.com. Retrieved 2009-01-31.
- "AVIA: History". AVIA. Retrieved 2009-01-31.
- "Aerospace Industry in the Czech Republic". CzechInvest. Archived from the original on 2008-12-03. Retrieved 2009-01-31.