The Dornier Do 17 was a German World War II bomber aircraft. It was a twin engine, "shoulder wing" design made by Dornier Flugzeugwerke. The aircraft was equipped with a retractable undercarriage and was originally designed to be a high speed airliner, but was redesigned to act as a bomber.
Development of the Do 17 began in the year 1932.
Because the Do 15 design was rejected, a redesigned aircraft, called Do 17 was made and it was accepted by the Reichsluftfahrtministerium, to build two prototypes of it. The first flight took place on 23rd November 1934. The slender fuselage was the reason for its nickname “Fliegender Bleistift” (“flying pencil”).
During flight testing it was realized that the Do 17 could also be used by the military, and from then on it was redesigned to be used as a high speed bomber.