The Aero Ae 01 was a Czechoslovakian military trainerbiplane built in 1919 and was Aero's first attempt to modify one of the aircraft designs they had been manufacturing under licence during World War I, the Hansa-Brandenburg B.I.[1] It was designed by Antonín Vlasák under the direction of Jan Kouril.[2] The project was originally designated as Ae 10, but later re-designated to Ae 01.[citation needed] The army operated the aircraft under designation A-1.