The Avia BH-3 was a fighter plane built in Czechoslovakia in 1921.
Conceptually a descendant of the BH-1 sports plane, it was a braced, low wing monoplane of conventional configuration and tailskid undercarriage.
Following favourable trials in June 1921, ten examples were ordered by the Czechoslovakian Air Force.
These were delivered in 1923 under the military designation B.3.
The type proved temperamental in service and was soon relegated to training duties, where it served until 1927.
BH-4
The Avia BH-4 was a prototype fighter aircraft built in Czechoslovakia in 1922.
It was a development of the BH-3 fitted with a Hispano-Suiza 8 engine in an attempt to improve the aircraft’s performance.
To accommodate the new powerplant, the forward fuselage was considerably redesigned, and the structure in general and undercarriage in particular were strengthened.
Performance was found to be only marginally better than the BH-3, and development was quickly abandoned.
