When World War I ended, the German Air Force was disbanded under the Treaty of Versailles, which required the German government to abandon all military aviation by October 1, 1919. However, by 1922, it was legal for Germany to design and manufacture commercial aircraft, and one of the first modern medium bombers to emerge from this process was the Heinkel He 111, the first prototype of which an enlarged, twin-engine version of the single-engine mail-liaison He 70, which set 8 world speed records in 1933 flew in February of 1935. The second prototype, the He 111 V2, had shorter wings and was the first civil transport prototype, capable of carrying 10 passengers and mail. The third prototype, He 111 V3 also had shorter wings and was the first true bomber prototype. Six He 111 C series airliners were derived from the fourth prototype, the He 111 V4, and went into service with Lufthansa in 1936, powered by a variety of engines, including BMW 132 radials. The first production models had the classic stepped windshield and an elliptical wing, which the designers, Siegfried and Walter Gunter, favored.
As a military aircraft, it took longer to gain favor, because military load requirements and underpowered engines kept its cruising speed down to less than 170 mph. However, in early 1936, the plane was given 1,000 hp Daimler Benz DB 600A engines which improved performance dramatically enough to bring in substantial orders. The first two mass-production versions, He 111 E and He 111 F experienced great success during the Spanish Civil War, where they served with the Condor Legion as fast bombers, able to outrun many of the fighters sent against them.
In fact, the experience in Spain generated a false sense of security in which the Germans thought that the He 111's light armament and speed would be sufficient in the coming war. Thus, although it was out of date, the large numbers in which it had been produced made the He 111 the Luftwaffe's primary bomber for far too long in the war, availability being more persuasive than practicality for this serviceable, but highly vulnerable, aircraft. Modern fighters like the Supermarine Spitfire and the Hawker Hurricane proved the He 111's inadequacy during the Battle of Britain. As soon as possible, the Luftwaffe replaced the Heinkel with the Junkers Ju 88, reassigning the Heinkel to night operations and other specialized tasks until, by war's end, it was being used primarily as a transport.
More than 7,300 had been built for the Luftwaffe by autumn, 1944, with another 236 (He 111H) being built by the Spanish manufacturer, CASA, during and after the war (as the CASA 2.111), some with the traditional Jumo 211 engines, some with Rolls-Royce Merlins. In service with the Luftwaffe from 1937 to 1945, the Heinkels remained in Spanish service until 1965.
One of the more bizarre adaptations of the Heinkel by the Luftwaffe was the He 111 Z-1, in which two He 111s were joined at the wing with a special section containing a fifth engine. Two prototypes and 10 production models were manufactured, their purpose being to provide the power to haul the huge Messerschmitt Me 321 transport gliders.
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by killerbunny » Thu Feb 02, 2006 8:48 am 
Bar by Mees
