Type 2-seat reconnaissance
Engine 1 Walter Castor
Dimensions Length  8,60 m, height 3,20 m ,  span 12,80 m , wing area 36,5 m2  ,
Weights Empty , loaded 1389 kg , max. take off weight  
Performance Max.. speed  195 km/h, cruising speed 169 km/h , range 750 km, endurance  , service ceiling 6500 m  , climb to 5000 m 28,18 min.
Armament Movable twin Lewis gun in the observer's position,  - possibility to carry 6  10 kg bombs under the wings
Type Werk.Nr Registration History
In 1928, at the request of MNO, a 240 hp Walter Castor radial engine was built into the A-11.105 aircraft at the Aero factory. After the end of the serial production of the A-11, the structure was revised, for example the chassis was modernized. The machine was given the designation Aero A-211 and 18 units were produced by order of MNO. The A-211 aircraft was mainly used to train pilots in visual flying and was quite popular.