Aero Ae 04 The Aero Ae 04 was a Czechoslovakian biplane fighter aircraft of 1921 . A development of the Ae 02 , it was no more successful than its predecessor in attracting purchase orders , and it flew only in prototype form . Undaunted by the lack of interest , development continued as the A.18 . Specifications ( Ae 04 ) This aircraft article has not been updated to WikiProject Aircraft 's current standards . Please see this page for more details . General characteristics Crew : one , pilot Length : 5.60 m ( 18 ft 4 in ) Wingspan : 7.70 m ( 25 ft 3 in ) Height : 2.70 m ( 8 ft 10 in ) Wing area : 14.6 m² ( 157 ft² ) Empty : 670 kg ( 1 , 474 lb ) Loaded : kg ( lb ) Maximum takeoff : 900 kg ( 1 , 980 lb ) Powerplant : 1x BMW IIIa , 138 kW ( 185 hp ) Performance Maximum speed : 225 km/h ( 69 mph ) Range : km ( miles ) Service ceiling : 6 , 362 m ( 20 , 876 ft ) Rate of climb : 357 m/min ( 1 , 171 ft/min ) Wing loading : kg/m² ( lb/ft² ) Power/mass : W/kg ( hp/lb ) Armament 2x synchronised .303 Vickers machine guns Related content Related development : Aero Ae 02 - Aero A . 18 Comparable aircraft : Designation sequence : Ae 01 - Ae 02 - Ae 03 - Ae 04 - Ae 10 Lists related to aviation Aircraft | Aircraft manufacturers | Aircraft engines | Aircraft engine manufacturers | Airports | Airlines Air forces | Aircraft weapons | Missiles | Timeline of aviation Categories : Aircraft without proper specifications | Czechoslovakian fighter aircraft 1920-1929 