The Heinkel He 111 was a German aircraft designed by Sigfried and Walter Günter in the early 1930s in violation of the Treaty of Versailles. Often described as a "Wolf in sheep's clothing", it masqueraded as a transport aircraft, though its actual purpose was to provide the Luftwaffe with a fast medium bomber.

Perhaps the best-recognised German bomber due to the distinctive, extensively glazed, bullet-shaped "greenhouse" nose of later versions, the Heinkel was the most numerous and the primary Luftwaffe bomber during the early stages of World War II. It fared well until the Battle of Britain, when its weak defensive armament, relatively low speed, and poor manoeuvrability were exposed. Nevertheless, it proved capable of sustaining heavy damage and remaining airborne. As the war progressed, the He 111 was used in a variety of roles on every front in the European Theathre. It was used as a stategic bomber during the Battle of Britain, a torpede bomber during the Battel of the Atlantic, and a medium bomber and a transport aircraft on the Western, Eastern,Mediterranean, Middl Eastern and North Africa.

Although constantly upgraded, the Heinkel He 111 became obsolete during the latter part of the war. It was intended to be replaced by the Luftwaffe's Bomber B project, but the delays and eventual cancellation of the project forced the Luftwaffe to continue using the He 111 until the end of the war. Manufacture ceased in 1944, at which point, piston-engine bomber production was largely halted in favour of fighter aircraft. With the German bomber force defunct, the He 111 was used for transport and logistics.

The design of the Heinkel endured after the war in the CASA 2.111. The Spanish received a batch of He 111H-16s in 1943 along with an agreement to licence-build Spanish versions. Its airframe was produced in Spain under license by Construcciones Aeronáuticas SA. The design differed significantly in powerplant only. The Heinkel's descendant continued in service until 1973, when it was retired.

He 111 H-6: Torpedo bomber, could carry two LT F5b torpedoes externally, powered by Jumo 211F-1 engines, had six MG 15s and one MG FF cannon in forward gondola

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