| BH-21 | |
|---|---|
 | |
| General information | |
| Type | Fighter |
| Manufacturer | Avia |
| Designer | |
| Primary users | Czechoslovakian Air Force |
| Number built | 184 |
| History | |
| First flight | January 1925 |
The Avia BH-21 was a fighter biplane designed and produced by the Czechoslovakian aircraft manufacturer Avia. First flown in January 1925, it served an important role in securing Czechoslovak national security during the Interwar period.
It originated as the Avia BH-17 during the early 1920s, which was redesigned in response to feedback from an official evaluation of the aircraft as a fighter. Performing its maiden flight in January 1925, it was put into quantity production later that same year. It was operated by both the Czechoslovakian Air Force and the Belgian Air Force. As well as being a competent fighter aircraft, it was also an accomplished racer, winning several air races in the mid-1920s.
