Bombers
Why was the Do 17 less frequently used than other planes for night bomb in the Battle of Britain?
Battle of Britain
The "Luftwaffe"'s four primary bombers were the Heinkel He 111, Dornier Do 17, and Junkers Ju 88 for level bombing, and the Junkers Ju 87 "Stuka" for diving attacks. The Heinkel He 111 was used in greater numbers than the others during the conflict and is better known, partly due to its distinctive wing shape. Each level bomber also had a few reconnaissance versions that were used during the battle. Although successful in previous "Luftwaffe" engagements, the "Stuka" suffered heavy losses in the Battle of Britain, particularly on 18 August, due to its slow speed and vulnerability to fighter interception after the dive bombing. As a result of the losses and limited payload and range, "Stuka" units were largely removed from operations over England and concentrated on shipping instead until they were re-deployed to the Eastern Front in 1941. They returned on occasion, such as on 13 September to attack Tangmere airfield. The remaining three bomber types differed in their capabilities; the Heinkel 111 was the slowest; the Ju 88 was the fastest once its mainly external bomb load was dropped; and the Do 17 had the smallest bomb load. All three bomber types suffered heavy losses from British fighters, but the Ju 88 disproportionately so. The German bombers required constant protection by the "Luftwaffe"'s fighter force. There were not enough Bf 109Es to support more than 300–400 bombers on any given day. Later in the conflict, when night bombing became more frequent, all three were used. However, due to its reduced bomb load, the lighter Do 17 was used less than the He 111 and Ju 88 for this purpose. On the British side, three bomber types were mostly used on night operations against targets such as factories, invasion ports and railway centres; the Armstrong Whitworth Whitley, the Handley-Page Hampden and the Vickers Wellington were classified as heavy bombers by the RAF, although the Hampden was a medium bomber comparable to the He 111. The twin-engined Bristol Blenheim and the obsolescent single-engined Fairey Battle were both light bombers; the Blenheim was the most numerous of the aircraft equipping RAF Bomber Command and was used in attacks against shipping, ports, airfields and factories on the continent by day and by night. The Fairey Battle squadrons, which had suffered heavy losses in daylight attacks during the Battle of France, were brought up to strength with reserve aircraft and continued to operate at night in attacks against the invasion ports, until the Battle was withdrawn from UK front line service in October 1940.