The D.IV was similar to the D.III in having a plywood covered semi-monocoque fuselage, but the 195hp Benz Bz IIIb V-8 direct drive engine allowed for a cleaner nose than the NAG C III engine of the D.III.
It retained the single axle main undercarriage of the D.III and had a similar tail structure.
The upper wing had straight edges, a wider span and wider chord, the lower wing had curved tips.
The second prototype made it to the first of the D-type fighter competitions at Adlershof, but was lost on 29 January 1918 when the engine caught fire, destroying the aircraft.
Data from German Aircraft of the First World War[2]General characteristics Performance Armament