The Avia BH-11 was a two-seat sport aircraft built in Czechoslovakia in 1923, a further development of the Avia BH-9. The main changes in this version involved a redesign of the forward fuselage. 15 examples were ordered by the Czechoslovakian Army as trainers and general liaison aircraft, and operated under the military designation B.11. Six years after the BH-11 first flew, a new version was produced for the civil market as the BH-11B Antelope. This replaced the original Walter NZ 60 45 kW (60 hp) engine with a Walter Vega of 63 kW (85 hp) and was built in small numbers. As a further development, the BH-11C retained the original engine but the wingspan was increased by 1.4 m (4 ft 6 in).
Source: Avia BH-11 on Wikipedia
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The Avia BH-11 was a Czechoslovakian single-engine biplane designed by Pavel Beneš and Miroslav Hajn in the 1920s. It was intended as a sport and touring aircraft, and also served as a trainer and liaison aircraft for the Czechoslovak Air Force. The BH-11 had a wooden structure covered with fabric, and featured a fixed tailskid landing gear and an open cockpit for two occupants in tandem.
The powerplant was a Walter NZ 60 radial engine that gave a maximum speed of 170 km/h (106 mph) and a range of 600 km (373 mi). The BH-11 was one of the most successful Czechoslovakian aircraft of its time, with over 200 units built and exported to several countries. It also participated in several air races and set some world records for its class.
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