The unarmed D.IV 1651/16 with a dorsal fin in front of the rudder.
With the exception of the prototype and the 987 and 1089 wns, all D.IVs had a dorsal fin.
The unarmed 1653/16.
The K on the hull of this D.IV indicates that it was the personal plane of Lieutenant Hans von Keudel.
A D.IV, delivered to Sweden, in a complete German painting.
The D.IVs delivered to Sweden were equipped with 150 hp Argus As.III engines.
D.IV hull with experimental armament on the hull.
Prototype of the D.IV with wn 782.
Production prototype of the D.IV with wn 927.
Prototype of the D.IV with wn 782.
Prototype of the D.IV with wn 782, without dorsal fin, with ailerons in the wing.
Prototype of the D.IV with wn 782 in August 1916.
The 1600/16 with wn 987.
Close-up of the 1600/16 with wn 987.
The 1640/16 with wn 1089 was used to test a number of things, including the aerodynamic spinner on the propeller hub.
The exhaust was also mounted upwards instead of along the engine.
Rear view of the 1640/16 with wn 1089.
Close-up of the streamlined nose of the 1640/16 with wn 1089.
Close-up with exhaust mounted from 1640/16 with wn 1089.
The 1640/16 with wn 1089.
The 1640/16 with wn 1089.
Hull of the 1663/16 with wn 1112, on which a static test was performed.
The 5851/16 with wn 1663 for Sweden with a 150 hp Argus As.III engine.