Avia BH-11

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.

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

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)

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)

See also

Related development

References

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

Further reading

  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 86.
  • Němeček, Vaclav (1968). Československá letadla (in Czech). Praha: Naše Vojsko.
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 889 Sheet 86.
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