Avia BH-4

The Avia BH-4 was a two-seat biplane fighter aircraft designed and built in Czechoslovakia in 1922. It was the fourth design from the Avia aviation company and was conceived by Pavel Beneš and Miroslav Hajn. The BH-4 was characterized by its clean aerodynamic lines and robust construction. It featured a wooden frame covered in fabric and was powered by a Hispano-Suiza 8Ba inline engine. While it demonstrated good performance for its time, it was not adopted for mass production by the Czechoslovak Air Force. Only a small number of prototypes were built. The BH-4 served primarily as a testbed for future Avia fighter designs.