The Arado Ar 81 was an experimental design developed during the late 1930s.
It was on a visit to the United States that Ernst Udet, the World War I ace who headed the C-Amt, first witnessed dive bombing by Curtiss Helldivers. He was fired with enthusiasm and in 1933 started the important Sturzkampfflugzeug programme that was to lead to the immortal Stuka. Arado surprisingly built the Ar 81 as a very long biplane, which despite having twin ﬁns showed instability in flight. With the V3 the Arado team made the rear fuselage deeper and fitted a large single fin. From its first flight in the spring of 1936 it was clear the V3 was better than the Ju 87 in almost all respects, but the monoplane was chosen - mainly because it was a monoplane.
- Origin: Arado Handelsgesellschaft, Warnemijnde.
- Engine: 640hp Junkers Jumo 210Ca inverted-vee~12 water~cooled.
- Dimensions: Span 36ft 0 3/4in (11.00m); length 37ft 8 3/4in (11.50m); height 11ft l0in (3.61m).
- Weights: Empty 4,244Ib (1,925kg); loaded 6,768lb (3,070kg).
- Performance: Maximum speed 2l4mph (344km/h); range 430 miles (692km).
- Armament: Proposed. one 7.92mm manually aimed MG 15 in rear cockpit, one 7.92mm synchronized MG 17, one 551lb (250kg) bomb.