Fokker D.IV was a German fighter biplane of World War I, a development of the D.I. It had a more powerful Mercedes D.III engine, and the first Fokker front-line design to use ailerons in place of wing warping from the start for roll control. The aircraft was purchased in small numbers (40) by the German Army and the Swedes bought 4.
Crew: one pilot
Length: 6.30 m (21 ft 0 in)
Wingspan: 9.70 m (31 ft 10 in)
Height: 2.75 m (9 ft 0 in)
Wing area: 21.0 m 2 (226 ft 2)
Empty weight: 606 kg (1,336 lb)
Gross weight: 840 kg (1,852 lb)
Powerplant: 1 × Mercedes D.III straight-6, 120 kW (160 hp)
Maximum speed: 100 km/h (62 mph)
 Range: 220 km (137 miles)
Rate of climb: 5.6 m/s (1,100; 20 minutes to 13,100 Ft. ft/min)</ul>
Armament 2 × fixed, forward-firing 7.92 mm (.312 in) LMG 08/15 machine guns
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. pp. 399.
World Aircraft Information Files. London: Bright Star Publishing. pp. File 894 Sheet 40–41.
Green, William; Gordon Swanborough (1994). The Complete Book of Fighters. London: Greenwich Editions. pp. 221.
Lamberton, W. M. (1960). Fighter Aircraft of the 1914-1918 War. Letchworth,Herts: Harleyford Publications Limited. pp. 218.
D, DD- and DJ-class aircraft designations
D- and DD- class