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 | |
|---|---|
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| 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)
References
- 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.