The Aero A.18 was a biplane fighter aircraft built in Czechoslovakia in the 1920s.

[1][2] The A.18 was designed by Antonin Vlasák and Antonin Husnik and first flew in March 1923; only one of three prototype fighters that Aero flew that year, but this one was selected for production over the A.19 and A.20 that competed with it.

[3] Twenty machines saw service with the Czechoslovak Air Force in the period between the wars.

Both aircraft won their races, and the A.18C is preserved at the Prague Aviation Museum in Kbely along with a replica of a standard A.18 fighter.

[3] Data from The Complete Book of Fighters,[3] Biplanes, Triplanes, and Seaplanes,[4] Jane's all the World's Aircraft 1924[5]General characteristics Performance Armament