Fokker D.III

Fokker D.III in Luchtvaartafdeling markings
Role	Fighter Type of aircraft
Manufacturer	Fokker-Flugzeugwerke
Designer	Martin Kreutzer
Primary user	Luftstreitkräfte
Produced	210

Design and development

The M.19 began as an effort to improve the performance of the Fokker D.II (Fokker designation M.17).^[1] The M.19 featured the Oberursel U.III 14-cylinder, two-row rotary engine, combined with the two-bay wing cellule of the Fokker D.I.^[1] The U.III engine, first used in the Fokker E.IV, required a revised fore-and-aft mount and a strengthened fuselage.^[1] The prototype M.19 arrived at Adlershof for testing on 20 July 1916. Idflieg issued a production order for 50 aircraft at that time, followed by orders for an additional 60 aircraft in August and 100 in November. The new aircraft was designated D.III by Idflieg.

Operational history

The first seven production aircraft were delivered on 1 September 1916.^[2] On that date, two D.III aircraft were ferried from Armee Flug Park 1 to Jagdstaffel 2 at Bertincourt.^[3] Oswald Boelcke received serial 352/16 and obtained seven victories in it between 2 September and 15 September.^[4]

While the D.III offered better performance than the D.I and D.II, Boelcke nevertheless found the D.III to be too slow.^[5]^[6] The D.III was plagued by its U.III engine, which wore out quickly and was difficult to manufacture.^[7] Low compression resulted in poor performance at altitude^[8] and cooling of the rear row of cylinders proved problematic. Moreover, the D.III offered indifferent maneuverability.^[9] On Boelcke's recommendation, the D.III was withdrawn from heavily contested sectors of the Western Front, but it continued to serve in quieter sectors.^[5]

In early October 1916, evaluation of Fokker's M.21 prototype at Adlershof revealed poor construction and workmanship.^[2] In response, Idflieg directed that a production D.III be tested for quality control purposes.^[2] In November 1916, serial 369/16 was disassembled and tested to destruction at Adlershof.^[10] While the wings proved acceptable, the fuselage and tail surfaces failed to meet specifications.^[2]^[10] Idflieg reprimanded Fokker for his firm's substandard construction practices, but permitted D.III production to continue.^[2] The Kogenluft, however, forbade the use of Fokker aircraft for frontline duties.^[2]

Fokker built 210 D.III aircraft at its Schwerin factory before production ceased in the spring of 1917. Late production aircraft replaced the wing-warping system with horn-balanced ailerons on the upper wing. Though unsuitable for frontline service, the D.III continued to serve in home defense units until late 1917.^[5] In October 1917, Germany supplied 10 D.IIIs to the Netherlands.^[11] These aircraft remained in service with the Luchtvaartafdeling until 1921.

Boelcke's D.III, serial 352/16, survived the war to be displayed at the Zeughaus museum in Berlin. The aircraft was destroyed by an Allied bombing raid in 1943.^[4]

Operators

German Empire

Luftstreitkräfte

Netherlands

Luchtvaartafdeling

Specifications

General characteristics

Crew: one pilot
Length: 6.30 m (20 ft 8 in)
Wingspan: 9.05 m (29 ft 8 in)
Height: 2.55 m (8 ft 4 in)
Wing area: 20.0 m² (215 sq ft)
Empty weight: 430 kg (948 lb)
Gross weight: 710 kg (1,565 lb)
Powerplant: 1 × Oberursel U.III , 120 kW (160 hp)

Performance

Maximum speed: 160 km/h (100 mph, 87 kn)
Range: 220 km (137 mi, 119 nmi)
Service ceiling: 4,700 m (15,420 ft)
Rate of climb: 4.8 m/s (940 ft/min)

Armament

2 × fixed 7.92 mm (.312 in) lMG 08 Spandau machine guns^[12]

References

Notes

^ ^a ^b ^c Gray and Thetford 1962, p. 92.
^ ^a ^b ^c ^d ^e ^f Leaman 2003, p. 23.
^ VanWyngarden 2007, p. 10.
^ ^a ^b VanWyngarden 2006, p. 76.
^ ^a ^b ^c Weyl 1965, p. 171.
^ Lamberton 1960, p. 120
^ Weyl 1965, pp. 122-123.
^ Weyl 1965, p. 123.
^ Weyl 1965, p. 173.
^ ^a ^b Weyl 1965, p. 172.
^ Green and Swanborough 1994, p. 221.
^ Woodman 1997, p.3.

Bibliography

Gerdessen, F (July–August 1999). "Round-Out: More Windfalls". Air Enthusiast (82): 79–80. ISSN 0143-5450.
Gray, Peter and Owen Thetford. German Aircraft of the First World War. London: Putnam, 1962. ISBN 0-933852-71-1
Green, William and Gordon Swanborough. The Complete Book of Fighters. New York: Smithmark, 1994. ISBN 0-8317-3939-8.
Lamberton, W.M., and E.F. Cheesman. Fighter Aircraft of the 1914-1918 War. Letchworth: Harleyford, 1960. ISBN 0-900435-01-1.
Leaman, Paul. Fokker Dr.I Triplane: A World War One Legend. Hersham, Surrey, UK: Classic Publications, 2003. ISBN 1-903223-28-8.
VanWyngarden, Greg. Early German Aces of World War I (Aircraft of the Aces No. 73). Oxford: Osprey Publishing, 2006. ISBN 1-84176-997-5.
VanWyngarden, Greg. Jagdstaffel 2 Boelcke: Von Richthofen's Mentor (Aviation Elite Units No. 26). Oxford: Osprey Publishing, 2007. ISBN 1-84603-203-2.
Weyl, A.R. Fokker: The Creative Years. London: Putnam, 1965. ISBN 0-85177-817-8.
Woodman, Harry. Spandau Guns (Windsock Mini Datafile No.10). Berkhamsted, Herts, UK: Albatros Publications, 1997. ISBN 0-948414-90-1.

Fokker aircraft

Company designations
pre-1918

M.1 M.2 M.3 M.4 M.5 M.6 M.7 M.8 M.9 M.10 M.14 M.15 M.16 M.17 M.18 M.19 M.21 M.22
V.1 V.2 V.3 V.4 V.5 V.6 V.7 V.8 V.9 V.10 V.11 V.12 V.13 V.14 V.16 V.17 V.18 V.20 V.21 V.22 V.23 V.24 V.25 V.26 V.27 V.28 V.29 V.30 V.31 V.33 V.34 V.35 V.36 V.37 V.38 V.39 V.40 V.41 V.42 V.43 V.44 V.45 W.1 W.2 W.3 W.4

Austro-Hungarian
military designations

German military
designations

A.I A.II A.III
C.I
D.I D.II D.III D.IV D.V D.VI D.VII D.VIII
Dr.I
E.I E.II E.III E.IV E.V
F.I
K.I

Company designations
post-1918

continuing
German military
style designations:

B.I B.II B.III B.IV B.V B.VI
C.II C.III C.IV C.V C.VI C.VII C.VIII C.IX C.X C.XI C.XIV C.XV
D.IX D.X D.XI D.XII D.XIII D.XIV D.XV D.XVI D.XVII D.XVIII D.XIX D.XX D.XXI D.22 D.23 D.24
DC.I DC.II
F.I F.II F.III F.IV F.V F.VI F.VII F.VIII F.IX F.X F.XI F.XII F.XIII F.XIV F.XV F.XVI F.XVII F.XVIII F.XIX F.XX F.XXI F.XXIII F.25 F26 F27 F28 F.29 F.37
FG.I FG.II FG.III FG.IV
G.I G.II G.III
S.I S.II S.III S.IV S.V S.VI S.VII S.VIII S.IX S.X S.11 S.12 S.13 S.14 S.15 S.16
T.II T.III T.IV T.V T.VI T.VII T.VIII T.IX T.10

based on
seating:

F.XXII
F.XXIV
F.XXXVI
F.40
50
F.56
60
70
100
130

Atlantic Aircraft
(Fokker America/Atlantic-Fokker)

United States
military designations

Observation:	AO-1 CO-4 XO-27
Transports:	T-2 C-2 C-5 C-7 C-14 C-15 C-16 C-20 C-31 RA
Bombers:	XHB-2 XLB-2 XB-8 FT-1 FT-2
Attack:	XA-7
Fighters:	PW-5 PW-6 PW-7
Ambulance:	A-2
Trainer:	TW-4

Idflieg D and DJ-class aircraft designations

D- class

AEG	D.I D.II D.III
Albatros	D.I D.II D.III D.IV D.V D.VI D.VII D.VIII D.IX D.X D.XI D.XII
Aviatik	(D.I skipped) D.II D.III D.IV D.V D.VI D.VII
Daimler	D.I D.II
DFW	D.I D.II
Euler	D.I D.II
Fokker	D.I D.II D.III D.IV D.V D.VI D.VII D.VIII
Friedrichshafen	D.I D.II D.III
Halberstadt	D.I D.II D.III D.IV D.V
Junkers	D.I
Kondor	D.I
LFG/Roland	D.I D.II D.III D.IV D.V D.VI D.VII D.VIII D.IX D.X D.XI D.XII D.XIII D.XIV D.XV D.XVI D.XVII
LVG	D.I D.II D.III D.IV D.V D.VI
Märkische	D.I
Naglo	D.I D.II
Pfalz	D.I D.II D.III D.IV D.V D.VI D.VII D.VIII D.IX D.X D.XI D.XII D.XIII D.XIV D.XV
Rumpler	D.I
Schütte-Lanz	D.I D.II D.III D.IV D.V D.VI D.VII
Siemens-Schuckert	D.I D.II D.III D.IV D.V D.VI
Zeppelin-Lindau	D.I

DJ- class

AEG	DJ.I

v t e World War I aircraft of the Central Powers
Fighters	AEG D.I AEG Dr.I Albatros D.I Albatros D.II Albatros D.III Albatros D.V Aviatik D.I Aviatik C.VI Daimler L.6 Euler D.I Euler D.II Fokker D.I Fokker D.II Fokker D.III Fokker D.IV Fokker D.V Fokker D.VI Fokker D.VII Fokker D.VIII Fokker Dr.I Fokker E.I Fokker E.II Fokker E.III Fokker E.IV Fokker E.V Halberstadt D.II Hannover CL.II Hannover CL.III Hannover CL.IV Hannover CL.V Hansa-Brandenburg W.12 Hansa-Brandenburg W.29 Junkers D.I Kondor D.6 Kondor E.III Naglo D.II Pfalz D.III Pfalz D.XII Pfalz Dr.I Pfalz E.I Pfalz E.II Phönix D.I LFG Roland D.II LFG Roland D.VI Siemens-Schuckert D.I Siemens-Schuckert D.II Siemens-Schuckert D.III Siemens-Schuckert D.IV Zeppelin-Lindau D.I
Bombers and ground attack	AEG DJ.I AEG G.I AEG G.II AEG G.III AEG G.IV AEG G.V AEG J.I AEG J.II AEG R.I Friedrichshafen G.II Friedrichshafen G.III Gotha G.I Gotha G.II Gotha G.III Gotha G.IV Gotha G.V Gotha GL.VII Gotha G.IX Hannover CL.II Junkers CL.I Junkers J.I Rumpler G.I Rumpler G.II Rumpler G.III Siemens-Schuckert L.I Zeppelin-Lindau Rs.II Zeppelin-Lindau Rs.III Zeppelin-Lindau Rs.IV Zeppelin-Staaken R.VI
Reconnaissance	AEG B.I AEG B.II AEG B.III AEG C.I AEG C.II AEG C.III AEG C.IV AEG C.V AEG C.VI AEG C.VII AEG C.VIII AGO C.I AGO C.II AGO C.III AGO C.IV AGO C.VII AGO C.VIII Albatros B.I Albatros B.II Albatros C.I Albatros C.III Albatros C.V Albatros C.VII Albatros C.IX Albatros C.X Albatros C.XII Aviatik B.I Aviatik B.II Aviatik C.I Aviatik C.VI DFW C.V LFG Roland C.II LVG B.I LVG C.II Rumpler C.I Rumpler C.IV Rumpler Taube
Trainers	Euler D.I
Prototypes	Albatros C.II Fokker V.1 Fokker V.2 Junkers J 1 Junkers J 2 Zeppelin-Lindau Rs.I