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Avia BH-11

The Avia BH-11, a two-seater sport aircraft manufactured in Czechoslovakia in 1923, was an advancement of the Avia BH-9 with significant modifications made to the front fuselage.

The Czechoslovakian Army placed an order for 15 units of the Avia BH-11 to be used as trainers and general liaison aircraft, which were designated as B.11 for military purposes.

Six years post the maiden flight of the BH-11, a new variant known as the BH-11B Antelope was introduced for the civilian market, featuring a Walter Vega engine of 63 kW (85 hp) instead of the original Walter NZ 60 45 kW (60 hp) engine.

The BH-11B Antelope was produced in limited quantities, showcasing the upgrade from the original engine to the more powerful Walter Vega engine.

A subsequent model, the BH-11C, maintained the original engine while incorporating a wingspan extension of 1.4 m (4 ft 6 in) as part of its development.





6.64 m (21 ft 9 in)


9.72 m (31 ft 11 in)


2.53 m (8 ft 4 in)

Wing area

13.6 m2 (146 sq ft)

Empty weight

360 kg (794 lb)

Gross weight

610 kg (1,345 lb)

Fuel capacity

80 kg (180 lb) fuel and oil


1 × Walter NZ 60 5-cylinder air cooled radial piston engine,

45 kW (60 hp)


2-bladed fixed-pitch propeller


Maximum speed

160 km/h (99 mph, 86 kn)

Stall speed

75 km/h (47 mph, 40 kn)


650 km (400 mi, 350 nmi)

Service ceiling

3,300 m (10,800 ft)

Rate of climb

2.7 m/s (530 ft/min)

Time to altitude

1,000 m (3,300 ft) in 6 minutes,

2,000 m (6,600 ft) in 18 minutes

Wing loading

45 kg/m2 (9.2 lb/sq ft)


0.0733 kW/kg (0.0446 hp/lb)

Czechoslovakian Air Force, 1918-1970, Aircam Aviation Special 05-Richard Ward, Zdenek Titz & Gordon C. Davies.

Ceskoslovenské Letectvo, 1918-1924-Jiří Rajlich & Jiří Sehnal.

Avia Motors s.r.o.

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