Editing Heinkel He 112 (section)

===Heinkel's design===

Heinkel's design was created primarily by twin brothers Walter and Siegfried Günter, whose designs would dominate most of Heinkel's work. They started work on ''Projekt'' 1015 in late 1933 under the guise of the original courier aircraft, based around the [[BMW XV]] [[Inline engine (aeronautics)|inline engine]]. Work was already underway when the official request went out on 2 May, and on 5 May the design was renamed the He 112.

The primary source of inspiration for the He 112 was their earlier [[Heinkel He 70|He 70]] ''Blitz'' ("Lightning") design. The ''Blitz'' was a single-engine, four-passenger aircraft originally designed for use by [[Deutsche Luft Hansa|Lufthansa]], and it, in turn, was inspired by the famous [[Lockheed Model 9 Orion]] [[mail plane]]. Like many civilian designs of the time, the aircraft was pressed into military service and was used as a two-seat [[bomber]] (although mostly for [[Aerial reconnaissance|reconnaissance]]) and served in this role in Spain. The ''Blitz'' introduced a number of new construction techniques to the Heinkel company; it was its first low-wing monoplane, its first with retractable [[landing gear]], its first all-metal [[Monocoque#Aircraft|monocoque]] design and its [[Elliptical wing|elliptical]], reverse-[[gull wing]] would be seen on a number of later projects. The ''Blitz'' could almost meet the new fighter requirements itself, so it is not surprising that the Günters would choose to work with the existing design as much as possible.

Ernst Heinkel's He 112 submission was a scaled-down version of the He 70, a fast mail plane, sharing numerous features with it including an all-metal construction – including its oval cross-section fuselage and two [[Spar (aviation)|spar]] monoplane wings which were covered with flush-head rivets and stressed metal skin-, similar inverted semi-elliptical gull wings and retractable landing gear.{{sfn|Lepage|2009|p=214}}{{sfn|Jackson|2015|p=16}} The wide track of the undercarriage, a result of having outward retraction from the low point of the wing's gull-bend{{citation needed|reason=not in given source|date=October 2017}}, gave the aircraft excellent ground handling for take-off and landing.{{sfn|Jackson|2015|p=16}} The open [[cockpit]] and fuselage spine behind the headrest mounted into the deep-section fuselage offered the pilot a good view when taxiing and were included to provide excellent vision and make [[biplane]]-trained pilots feel more comfortable.{{citation needed|reason=not in given source|date=October 2017}}