Avia BH-11

BH-11
Role	Sports plane
Manufacturer	Avia
Designer	Pavel Beneš and Miroslav Hajn
First flight	1923
Number built	ca. 20
Developed from	Avia BH-9

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.

Avia BH-11b

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).

A BH-11A and a BH-11C are preserved at the Prague Aviation Museum, Kbely.

Specifications (BH-11)

Avia BH-11 3-view drawing from NACA Aircraft Circular No.40

Data from Jane's all the World's Aircraft 1928[1]

General characteristics

Crew: 2
Length: 6.64 m (21 ft 9 in)
Wingspan: 9.72 m (31 ft 11 in)
Height: 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
Powerplant: 1 × Walter NZ 60 5-cylinder air-cooled radial piston engine, 45 kW (60 hp)
Propellers: 2-bladed fixed-pitch propeller

Performance

Maximum speed: 160 km/h (99 mph, 86 kn)
Stall speed: 75 km/h (47 mph, 40 kn)
Range: 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)
Power/mass: 0.0733 kW/kg (0.0446 hp/lb)

References

Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. pp. 75c–76c.

Avia BH-11

Specifications (BH-11)

See also

References

Further reading