Walter in-line 6
3 – 7.7 mm
The Aero A.11 was produced in Czechslovakia by Aero Vodochody after World War I. It was a military utility aircraft that was used primarily for attack and observation.
The Czech Aero A.11 was powered by a Walter W IV in-line 6 cylinder engine, designed for high altitude use, producing 240 h.p.
Eight Aero A.11 aircraft were exported to Finland. They were equipped with a Hispano-Suiza 8FB V-8 engine that produced 300 h.p.
Some 250 Aero A.11 aircraft were produced. A number saw action at the beginning of World War II.