ln the beginning of З0s it was appeared in the world an idea of high-speed bomber that could outstrip contemporary fighters. One of the objectifications of this conception became the twin-engine bomber Do 17 designed bу а German Dornier Flugzeug werke company.
Since the beginning of 1939 it wereproduced Do 17Z planes with new “Waffenkopf ” type nose part and air-cooled Bramo 323 Fafnir engines.
ln 1939-1940 it were produced about 500 Do 17Z-1 and Do 17Z- 2 bombers. They took part in all 1939-1941 Luft waffe operations – in Polish and French companies, in the Battle of Britain, and also in Balkans and in the Eastern Front .