The Do 17Z was an older type of German bomber that was no longer in production by the start of the Battle. Still, many "Kampfgeschwadern" still operated the Dornier, known as "the flying pencil" due to its sleek fuselage. Its air-cooled radial BMW engines meant that many of these aircraft were able to survive fighter attack because there was no vulnerable cooling system to disable. The Dornier was also manoeuvrable, and as a result was popular in the "Luftwaffe". The main problem with the Dornier was its limited 200 mile combat range, when fully loaded with bombs. Its bomb carrying capacity was also limited to 2,205 lbs. Older versions of the Do 17, mainly the E-1, were still used for weather reconnaissance duties.