Fokker E.I

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The Fokker E.I was the first fighter aircraft to enter service with the German Air Service in World War I. Its arrival at the front in mid-1915 marked the start of a period known as the "Fokker Scourge" during which the E.I and its Eindecker successors achieved a measure of air superiority over the Western Front.

Design and development

The E.I was essentially an armed version of the Fokker M.5K single-seat reconnaissance aircraft^[1](military designation A.III), which was in turn very closely based on the design of the 1913 French Morane-Saulnier Type H. Like the Morane, the Fokker was an externally braced mid-winged monoplane with a vertically tapered box section fuselage, with fully movable horizontal and vertical stabilizing surfaces, also known as "flying" surfaces, giving the pilot the usual tail control functions; roll control was achieved through controlled wing warping, as was conventional in contemporary monoplanes.^[2] Wing warping was achieved through external cables attached to the surface and running through a king post located in the front of the cockpit. The fuselage structure was fabric covered welded steel tubing, the biggest difference between the Fokker and the Morane, which had an entirely wooden framework. Welded steel tube provided the basis for the structure of all Fokker fuselages for many years.

This unremarkable and derivative design was, however, transformed into a formidable fighter when it was fitted with the newly developed synchronizer gear, the Fokker Stangensteuerung, firing a single 7.92 mm (.312 in) Parabellum LMG 14 or Spandau lMG 08 machine gun through the spinning propeller.^[1] Indeed the five production prototype airframes for the E.I design had been ordered and were under construction as A.IIIs but were completed as M.5K/MG aircraft, retaining the earlier "shoulder-wing" placement of the A.III type. Subsequent production E.Is had their wings lowered slightly – as Leutnant Otto Parschau's E.1/15 had later in its career during 1915 – from the M.5's shoulder configuration, which improved pilot visibility. (These were designated by Fokker as the M.14, which was also used for the following two Eindecker variants.)

All Fokker E.I aircraft had a 68.5 l (18.1 US gal) capacity, single gravity fuel tank, located forward of the cockpit, with a fuel gauge protruding from the sheet metal upper nose paneling, usually offset slightly to port.

Operational history

Leutnant Kurt Wintgens' "E.5/15" Eindecker, the first fighter aircraft to use a synchronized machine gun to shoot down an opposing aircraft

E.I with cowl removed, showing the Oberursel U.0 rotary engine and Stangensteuerung synchronizer's initial drive components

Two German pilots, Leutnants Otto Parschau and Kurt Wintgens,^[3] worked closely with Anthony Fokker in early 1915 during evaluation of the M.5K/MG. Wintgens is known to have downed a two-seat Morane-Saulnier Type L parasol monoplane on 1 July 1915 while flying his M.5K/MG, but as the victory occurred in the airspace behind Allied lines, over the Fôret de Parroy woods near Luneville, this could not be confirmed at the time. A similar victory over another Morane "Parasol" two-seater, again unconfirmed, was scored by Wintgens three days later. On the 15th, Wintgens scored his first confirmed victory over a third Morane Parasol,^[4] the earliest known confirmed aerial victory for anyone flying a Fokker E-series monoplane in combat.

Otto Parschau's E.1/15 Eindecker, the first to have the lowered wing location

The M.5K/MG usually used the Parabellum MG14 machine gun for the synchronized armament, which could prove to be a troublesome arrangement, and the five M.5K/MGs built by the Fokker factory in Schwerin/Gorries retained the "shoulder-wing" position of the M.5k for the monoplane wing. Parschau's E.1/15 later had its wing lowered to the "mid-wing" position of the production E.Is, while the remaining four were not known to have been changed. Oswald Boelcke, future German aerial tactician, was issued the third production M.5K/MG, which he flew during July 1915 with Feldflieger Abteiling 62, based near Douai and shared flying time with Max Immelmann^[5] After Boelcke achieved his own first aerial victory on July 4th with an Albatros C.I armed two-seat observation aircraft, Boelcke would score his first single-seater victory with E.3/15, over a B.E.2c British two-seater near Arras on 19 August 1915.^[6] Immelmann would shortly thereafter receive his own E.I, serialed E.13/15 for his own use.

E.Is were mainly flown by regular pilots of the Fliegertruppen des deutschen Kaiserreiches, with one Eindecker attached to each six-aircraft Feldflieger Abteilung aerial observation/reconnaissance unit. The Fliegertruppen forces were renamed the Luftstreitkräfte in October 1916, with both units directly serving the German Army; the formation of specialised Jastas (fighter squadrons) in the German air service was still to come. Two were supplied to the Austro-Hungarian air force and five to the Kaiserliche Marine in April 1916. The E.I was soon joined by the improved Fokker E.II and, as the first E.Is were entering service in June 1915, the first of the E.II type was being demonstrated by Anthony Fokker. Nevertheless E.I production continued in parallel with the E.II, depending on the availability of the Oberursel engines. By 1916, a total of 54 had been manufactured and delivered to the German Army, Navy and the Austro-Hungarian army.^[7]

Operators

Austria-Hungary

Kaiserliche und Königliche Luftfahrtruppen

German Empire

Turkey

Ottoman Air Force

Specifications (E.I.)

General characteristics

Crew: one, pilot
Length: 7.22 m (23 ft 7 in)
Wingspan: 8.85 m (29 ft 0 in)
Height: 2.9 m (9 ft 5½ in)
Wing area: 15.9 m² (172.2 ft²)
Empty weight: 360 kg (789 lb)
Loaded weight: 563 kg (1,241 lb)
Powerplant: 1 × Oberursel U.0 7-cylinder air-cooled rotary engine (clone of Gnome Lambda engine) using various makes of 2-blade propellers, from 2.3 to 2.5 meters (7.55 to 8.20 ft) diameter, 80 hp (60 kW)

Performance

Maximum speed: 130 km/h (81 mph)
Range: 198 km at 110 km/h (123 mi at 68 mph)
Service ceiling: 3,000 m (9,840 ft)
Rate of climb: 20 min to 2,000 m (6,560 ft)

Armament

1 × forward-firing 7.92 mm (.312 in) Spandau lMG 08 machine gun (one Parabellum MG14 M/G on prototypes)

References

Notes

↑ 1.0 1.1 Winchester 2006, p. 15.
↑ Winchester 2006, pp. 15–16.
↑ Grosz 2002
↑ vanWyngarden 2006, p. 12.
↑ vanWyngarden 2006, pp. 13–14.
↑ vanWyngarden 2006, p. 16.
↑ Winchester 2006, p. 16.

Bibliography

Boyne, Walter J. The Smithsonian Book of Flight for Young People. Washington, DC: Smithsonian Institution, 1988. ISBN 0-689-31422-1.
Dierikx, Marc. Fokker: A Transatlantic Biography. Washington, DC: Smithsonian Institution Press, 1997. ISBN 1-56098-735-9.
Grosz, Peter M. Fokker E I/II (Windsock Datafile No. 91). Berkhamsted, Herts, UK: Albatros Publications, 2002. ISBN 1-902207-46-7.
Jarrett, Phillip. "Database: The Fokker Eindeckers". Aeroplane Monthly, December 2004.
vanWyngarden, Greg. Early German Aces of World War I (Osprey Aircraft of the Aces 73). Botley, Oxfordshire, UK: Osprey, 2006. ISBN 978-1-84176-997-4.
Winchester, Jim. Fighter: The World's Finest Combat Aircraft - 1913 to the Present Day. New York: Barnes & Noble Publishing, Inc. and Parragon Publishing, 2006. ISBN 0-7607-7957-0.

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 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 (Dornier) Rs.II Zeppelin-Lindau (Dornier) Rs.III Zeppelin-Lindau (Dornier) 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 (Dornier) Rs.I

v t e Aviation in World War I

People and aircraft	Commanders Aces Aircraft of the Entente Powers Aircraft of the Central Powers Zeppelins

Campaigns and battles	Strategic bombing German Cuxhaven Bombing of cities Aerial reconnaissance Fokker Scourge Flight over Vienna Bloody April Battles

Entente Powers air services	British air services Royal Flying Corps Royal Naval Air Service Royal Air Force Australian Flying Corps Canadian Air Force (1918–1920) French Air Service Imperial Russian Air Service Italian Military Air Corps United States Army Air Service Greek air services Army Air Service Naval Air Service

Central Powers air services	Imperial German Air Service Austro-Hungarian Imperial and Royal Aviation Troops Ottoman Air Force Bulgarian Army Aeroplane Section

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

B.I
B.II
B.III

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

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

v t e Idflieg E-class aircraft designations

Fokker E.I E.II E.III E.IV E.V Junkers E.I Kondor (E.I and E.II not assigned) E.III LFG E.I LVG E.I NFW E.I E.II Pfalz E.I E.II E.III E.IV E.V E.VI Siemens-Schuckert E.I E.II E.III E.IV

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General	Aircraft manufacturers Aircraft engines manufacturers Gliders Airlines defunct Airports Civil authorities Museums Registration prefixes Rotorcraft manufacturers Timeline

Military	Air forces Weapons Experimental Missiles Unmanned

Accidents/incidents	Commercial airliners by location Fatalities by death toll General aviation Military

Records	Airspeed Altitude Distance Endurance Firsts Large Most-produced aircraft Most-produced rotorcraft

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