BH-4
The BH-4 was a fighter aircraft developed by the Czechoslovakian company Avia. Building upon the successful design of the BH-3, the company’s engineers created an aircraft prototype, which initially received the designation B-HS-3.
Design and Engine Integration
This prototype was a result of installing a 220-horsepower eight-cylinder Hispano-Suiza 8ba engine onto the BH-3 in 1922. Alongside modifications to the fuselage, the landing gear also underwent certain refinements.
Performance and Outcome
However, the aircraft’s characteristics only deteriorated after these changes. Consequently, the project was limited to just a single prototype, and it did not proceed to series production.
Technical Specifications
| Modification | BH-4 |
| Wingspan, m | 10.24 |
| Length, m | 6.47 |
| Height, m | 2.97 |
| Wing area, m2 | 15.76 |
| Empty weight | 724 |
| Normal takeoff weight | 1025 |
| Engine type | 1 Piston engine Hispano-Suiza 8ba |
| Power, hp | 1 x 220 |
| Maximum speed, km/h | 222 |
| Cruising speed, km/h | 190 |
| Practical range, km | 510 |
| Rate of climb, m/min | 250 |
| Crew | 1 |
| Armament | 2 forward-firing 7.7-mm Vickers machine guns |
Image and diagram gallery of the BH-4
 BH-4 |
 BH-4 |
ArchivoAéreo Editorial Team
A group of aviation researchers and enthusiasts dedicated to documenting and preserving global aeronautical history. All articles are reviewed to ensure historical accuracy.
Sources & Accuracy
The information presented in this technical sheet has been compiled from declassified flight manuals, historical archives, and specialized literature. While we strive for maximum accuracy, some performance data may vary depending on the specific variant or operational conditions.