The Aero A.25 was a biplane military trainer aircraft developed in Czechoslovakia from the Aero A.11 reconnaissance-bomber and generally similar to the Aero A.21 night trainer.

Some A.25s were powered by the less powerful 134 kW (180 hp) Breitfeld & Danek Perun I engines, in which case they were designated Aero A.125.

Specifications (Aero A.25)

Data from Tschechoslowakische Flugzeuge : von 1918 bis heute^[1]

General characteristics

• Crew: 2
• Length: 8.1 m (26 ft 7 in)
• Wingspan: 12.8 m (42 ft 0 in)
• Height: 3.1 m (10 ft 2 in) ^{[citation needed]}
• Wing area: 36.2 m² (390 sq ft) ^{[citation needed]}
• Empty weight: 985 kg (2,172 lb) ^{[citation needed]}
• Gross weight: 1,270 kg (2,800 lb) ^{[citation needed]}
• Powerplant: 1 × BMW IIIa 6-cylinder qater-cooled in-line piston engine, 136 kW (182 hp)
• Propellers: 2-bladed fixed-pitch propeller

Performance

• Maximum speed: 160 km/h (99 mph, 86 kn) ^{[citation needed]}
• Service ceiling: 6,500 m (21,300 ft) ^{[citation needed]}
• Rate of climb: 4 m/s (790 ft/min) ^{[citation needed]}
• Wing loading: 35 kg/m² (7.2 lb/sq ft) ^{[citation needed]}
• Power/mass: 0.110 kW/kg (0.067 hp/lb)^{[citation needed]}

Operators

• Czechoslovakia.