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/ Avia BH-11
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, these 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).
Specifications
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)
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