Dornier Do 17 / Do 215

Description : Twin Engine Bomber
Type : Low Wing Monoplane

Wingspan : 59 ft 0.75 inches ( 18 m )
Length : 52 ft 6 inches ( 15.95 m )
Height :14 ft 11 inches ( 4.55 m )
Wing Area : 592 sq feet ( 55.0 sq m )
Engines : 2 X DB600 Gs
BHP : 1050
Armament : 6 X 7.9 mm MG 15 Machine Guns
Bomb Load : 5,510 lb
Gross Weight : 27,400 lb

Max Speed : 292 mph ( 470 km. h )
Service Ceiling : 30,400 ft ( 9,250 m )
Range : 965 miles ( 1,550 km )


First Flight : Summer 1936
Service Entry : 1937

The DORNIER Do 17 two motor bombers have been used by the German Air Force more than any other type for the numerous photographic reconnaissance flights over France and over Great Britain. The Do 215, developed from the Do 17, is identical with it except for a redesigned nose, some strengthening of the structure and the installation of more powerful motors. The Do 17 was one of the first modern types of aeroplane to go into production for the Luftwaffe in 1935. Since then it has been fitted with three different types of motor. The prototype Do 17 flew with 660 h.p. B.M.W. VI un-supercharged liquid cooled upright Vee motors in the Summer of 1936. It had a top speed of 400 km.h. (249 mph.) at sea level. Later the 880 h.p, B.M.W. cylinder supercharged air-cooled radials were installed. They raised the top speed to 445 km.h. (276 m.p.h.) at 3,000 m. (9,840 ft.). Next the Do 17 was built with 1,050 h.p. Daimler Benz DB.600G motors. With them the top speed went up to 470 km.h. (292 m.p.h.) at 14,800 ft. Basically both the Do 17 and the Do 215 are all metal high wing cantilever monoplanes .  There are twin fins and rudders at the ends of the cantilever tail plane just outboard of the centre-lines of the motors.
The original long tapered nose gained the Do 17 the name of the "Flying Pencil."
The whole machine is flush riveted.
There is no dihedral on the wings, but the whole of the taper in thickness is on the under surface, The fuselage is a metal monocoque with stressed skin covering. The full cantilever tail plane is set at a small dihedral angle. Trimming tabs are used on all the movable control surfaces. The elevators are mass balanced with external balances, which pass through slots in the tail plane. The twin rudders have aerodynamic as well as mass balances. The fixed surfaces have metal covering, the movable surfaces fabric. The undercarriage is retracted hydraulically. The wheels, mounted between two oleo legs and equipped with mudguards and brakes, are raised backwards in to the motor nacelles and enclosed by hinged doors, so that only the tyre is left protruding.  The tail wheel retracts vertically in to the fuselage.
The Do 17 carries a crew of three, all in front of the wing. The pilot sits on the port side of the fuselage, so that there is room for the bomb-aimer to pass to his prone position below. A navigation compartment with hinged chart table occupies the space between the back of the pilot and the front spar of the wing.
Forward armament consists of two fixed machine guns in the front cowling, operated by the pilot. The bombs are stowed horizontally in the centre section of the fuselage between the spars. Up to 1,000 kg. (2,205 lb.) can be carried internally. The Do 215 is built on the same jigs as the Do 17 and only varies from it in minor detail.
They were robust enough to endure terrible amounts of gunfire, especially small calibre gunfire. Their strength did not depend upon bracing wires and wooden spars: these metal bombers had armour protection, with some of the vital mechanical parts duplicated. Even more valuable were the self sealing fuel tanks.


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