The D.IV – later to be re-designated Dr.I when the "Dr" prefix was adopted for Dreideckers (triplanes) – was powered by an 160 hp Mercedes D III water-cooled engine and carried the usual armament of twin synchronized 0.311 in (7.9 mm) LMG 08/15 machineguns. A single prototype was ordered by the Idflieg for evaluation, but this crashed at the end of September 1917. It was promptly rebuilt utilizing a D.VI fuselage, but subsequent testing revealed no particularly outstanding characteristics and further development was discontinued.
Span: 31 ft 0 in (9.45 m)
Length: 24 ft 4 in (7.32 m)
Weight empty: 2,050 lb (930 kg)
Loaded weight: 2,665 lb (1,208 kg)
Max speed: 96 mph (155 kmh)
Service ceiling: 19,685 ft (6,000 m)