The
Dornier Do17 was originally developed at a transport aircraft
that had it's roll turned into a bomber. In the early
days the aircraft earned the nick name of 'The Flying
Pencil' due to its long slender shape. With the advent
of the Do17Z the slender shape was distorted by a completely
new front end with increased window area and enlarged
cabin
This
overcame some of the poor defensive issues that had dogged
the aircraft during the Spanish Civil War. This war proved
a vital 'testing ground' for the tougher battles to come.
The modifications made an impact on the performance and
so the DB600 liquid cooled engines had to be replaced by
more powerful Bramo Fafnir 323P engines