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Aero A.21
The Aero A.21 was a biplane military trainer aircraft developed in Czechoslovakia from the Aero A.11 reconnaissance-bomber.
The aircraft was developed specifically as a night trainer, to teach Czech Air Force pilots instrument flying techniques.
Specifications
Crew
2
Length
8.2 m (26 ft 11 in)
Wingspan
12.8 m (42 ft 0 in)
Height
3.1 m (10 ft 2 in)
Wing area
36.5 m2 (393 sq ft)
Empty weight
1,080 kg (2,381 lb)
Gross weight
1,328 kg (2,928 lb)
Powerplant
1 × Breitfeld & Danek Perun I, 6 cyl water cooled inline piston engine,
130 kW (180 hp)
Performance
Maximum speed
170 km/h (110 mph, 92 kn)
Service ceiling
6,500 m (21,300 ft)
Rate of climb
2.35 m/s (463 ft/min)
Wing loading
36 kg/m2 (7.4 lb/sq ft)
Power/mass
0.100 kW/kg (0.06 hp/lb).
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