Fokker D.I

Fokker D.I and B.III

Role	Fighter aircraft
Manufacturer	Fokker-Flugzeugwerke
Designer	Martin Kreutzer
Introduction	1916
Produced	July 1916
Number built	144
Variants	Fokker D.II, D.III and D.IV.

The Fokker D.I (company designation M.18) was a development of the D.II fighter. The D.I was also flown in Austro-Hungarian service as a reconnaissance aircraft under the designation B.III. Confusing the matter further, both the D.II and D.I arrived at the Front in German service at similar times, in July–August 1916. The main designer was Martin Kreutzer.

Design and development

Fokker D.I 151-1916

Similar to the D.II, the D.I was an unstaggered single-bay, or Einstielig equal-span biplane. The upper fuselage was initially parallel with the upper wing and was fitted with the 75 kW (100 hp) Mercedes D.I six-cylinder water-cooled engine.

Control was achieved using wing-warping. The wings were also tested in twin-bay (Zweistielig) form. To improve visibility, the center section was cut back and the wings were slightly staggered and the top wing raised slightly.

These improvements were retained, and the airplane was ordered into production with an 89 kW (120 hp) Mercedes D.II inline engine and a single synchronized 7.92 mm (.312 in) lMG 08 machine gun. The Austro-Hungarian B.IIIs retained the D.I engine, and were armed with a Schwarzlose machine gun.

Operational history

Deliveries began in July 1916. 90 were delivered to the German Fliegertruppen, and 16 to the Austro-Hungarian Luftfahrttruppen (as the B III). Eight were license produced by the Magyar Általános Gépgyár in Hungary.

One Austro-Hungarian B III was experimentally fitted with a 119 kW (160 hp) Mercedes D.III engine. Another had ailerons instead of wing warping, and still another had long span, swept back wings.

Compared with aircraft in service at that time, such as the Albatros D.II and the Nieuport 11, this Fokker's design and performance were decidedly unimpressive, and further production did not take place.

The D.I was the basis for the D.III and D.IV.

Operators

Austria-Hungary: Austro-Hungarian Imperial and Royal Aviation Troops
German Empire: Luftstreitkräfte
Turkey

Ottoman Air Force

Specifications (D.I)

Data from The Complete Book of Fighters ^[1]

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: 20.00 m² (215.3 ft²)
Empty weight: 463 kg (1,020 lb)
Loaded weight: 670 kg (1,477 lb)
Powerplant: 1 × Mercedes D.II 6-cylinder water-cooled inline engine, 89 kW (120 hp)

Performance

Maximum speed: 150 km/h (81 kn, 93 mph)
Rate of climb: 3.33 m/s (656 ft/min)
Endurance: 1.5 hours

Armament

1 × forward-firing 7.92 mm (.312 in) LMG 08/15 machine gun

References

Wikimedia Commons has media related to Fokker aircraft.

Notes

↑ Gray and Thetford 1962, p.90

Bibliography

Gray, Peter and Thetford, Owen. German Aircraft since the First World War. London:Putnam, 1962.
Green William and Swanborough, Gordon. The Complete Book of Fighters. New York: Smithmark, 1994. ISBN 0-8317-3939-8.

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 Siemens-Schuckert L.I 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 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

Aircraft produced by Fokker

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.43 V.45

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
designations:

B.I B.II B.IIII B.IV B.V

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.XVI D.XVII D.XXI D.XXIII

DC.I

F.II F.III F.IV F.V F.VI F.VII F.VIII F.IX F.X F.XI F.XII F.XIV F.XVIII F.XX F.XXII F.XXIV F.25 F26 F27 F28 F.29

FG.I FG.II FG.III FG.IV

G.I

S.I S.II S.III S.IV S.IX S-11 S-12 S-13 S-14

T.II T.III T.IV T.V T.VIII T.IX

based on
seating:

Fokker America

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:	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, DD- and DJ-class aircraft designations

D- and DD- 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 not assigned) 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 DD.II

Halberstadt	D.I D.II D.III D.IV D.V

Junkers	D.I

Kondor	D.I D.II D.III D.IV D.V D.VI

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

MFW	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

KuKLFT B-class aircraft designations

Aviatik	B.I B.II B.III

Fokker	B.I B.II B.III

Hansa-Brandenburg	B.I

Lohner	B.I B.II B.III B.IV B.V B.VI B.VII

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