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).