Junkers CL.I

J 8, J 10 (CL.I), and J 11 (CLS.I)

Junkers J 11 (CLS.I)
Role	Ground-attack aircraft
National origin	Germany
Manufacturer	Junkers
First flight	10 December 1917
Primary user	Luftstreitkräfte
Number built	51

The Junkers CL.I was a ground-attack aircraft developed in Germany during World War I. Its construction was undertaken by Junkers under the designation J 8 as proof of Hugo Junkers' belief in the monoplane, after his firm had been required by the Idflieg to submit a biplane (the J 4) as its entry in a competition to select a ground-attack aircraft. The J 8 design took the J 7 fighter as its starting point, but had a longer fuselage to accommodate a tail gunner, and larger wings. The prototype flew in late 1917 and was followed over the next few months by three more development aircraft. The Idflieg was sufficiently impressed to want to order the type, but had misgivings about Junkers' ability to manufacture the aircraft in quantity and considered asking Linke-Hoffmann to produce the type under licence. Finally, however, Junkers was allowed to undertake the manufacture as part of a joint venture with Fokker, producing a slightly modified version of the J 8 design as the J 10. Like the other Junkers designs of the period, the aircraft featured a metal framework that was skinned with corrugated duralumin sheets. 47 examples were delivered before the Armistice, including three built as floatplanes under the designation CLS.I (factory designation J 11). After the war, one or two CL.Is were converted for commercial service by enclosing the rear cockpit under a canopy.

A passenger carrying J.10

Operators

Germany

Latvia

Latvian Air Force - Postwar.

Specifications (CL.I)

Data from German Aircraft of the First World War ^[1]

General characteristics

Crew: Two, pilot and gunner
Length: 7.90 m (25 ft 11 in)
Wingspan: 12.04 m (39 ft 6 in)
Height: 2.65 m (8 ft 8¼ in)
Wing area: 23.4 m² (253 ft²)
Empty weight: 710 kg (1,562 lb)
Gross weight: 1,050 kg (2,310 lb)
Powerplant: 1 × Mercedes D.IIIa, 134 kW (180 hp)

Performance

Maximum speed: 161 km/h (100 mph)
Endurance: 2^[2] hours
Service ceiling: 6,000^[3] m (19,700 ft)

Armament

2 × fixed, forward-firing machine guns
1 × trainable, rearward-firing machine gun

References

Wikimedia Commons has media related to Junkers CL.I.

Notes

↑ Gray and Thetford 1962, p.440.
↑ Green and Swanborough 1994, p.311.
↑ Boucher, W. Ira (10 April 2002). "The Closing Days Of The War". WWIAviation.com. Retrieved 2008-05-20.

Bibliography

Green, W; Swanborough, G (1994). The Complete Book of Fighters. New York: Smithmark. ISBN 0-8317-3939-8.
Gray, Peter; Thetford, Owen (1962). German Aircraft of the First World War. London: Putnam.
Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 536.
World Aircraft Information Files. London: Bright Star Publishing. pp. File 897 Sheet 01.

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

Junkers aircraft

Company	J 1 J 2 J 3 J 4 J 5 J 6 J 7 J 8 J 9 J 10 J 11 J 12 F 13 J 15 K 16 K 17 J 18 T 19 A 20 H 21 / J 21 / T 21 J 22 T 23 G 23 F 24 / G 24 A 25 T 26 T 27 J 28 T 29 K 30 G 31 A 32 W 33 W 34 A 35 S 36 K 37 G 38 K 39 K 47 A 48 A 50 K 51 K 53

Idflieg	CL.I D.I E.I J.I

RLM	Ju 46 Ju 49 Ju 52 Ju 60 Ju 85 Ju 86 Ju 87 Ju 88 Ju 89 Ju 90 Ju 160 Ju 187 Ju 188 Ju 248 Ju 252 Ju 268 Ju 287 Ju 288 Ju 290 Ju 322 Ju 352 Ju 388 Ju 390 Ju 488 Ju 635

"EF" (experimental)	EF 61 EF 126 EF 127 EF 128 EF 131 EF 132 EF 140 EF 150

Idflieg C-, CL-, CS-, and CLS-class aircraft designations

C- and CL-	AEG C.I C.II C.III C.IV C.V C.VI C.VII C.VIII AGO C.I C.II C.III C.IV C.VII C.VII Albatros C.I C.II C.III C.IV C.V C.VI C.VII C.VIII C.IX C.X C.XI C.XII C.XIII C.XIV C.XV Aviatik C.I C.II C.III C.V C.VI C.VIII C.IX BFW CL.I CL.II CL.III CL.IV DFW C.I C.II C.III C.IV C.V C.VI Fokker C.I Friedrichshafen C.I Germania C.I C.II C.IV Halberstadt C.I CL.II C.III CL.IV C.V C.VII C.VIII C.IX CLS.X Hannover C.I CL.II CL.III CL.IV CL.V Junkers CL.I LFG/Roland C.I C.II C.III C.V C.VIII LVG C.I C.II C.III C.IV C.V C.VI C.VIII OAW C.I C.II Otto C.I C.II Pfalz C.I Rumpler C.I C.III C.IV C.V C.VI C.VII C.VIII C.IX C.X Sablatnig C.I C.II C.III Schütte-Lanz C.I Zeppelin-Friedrichshafen C.I C.II Zeppelin-Lindau C.I C.II

CLS-	Albatros CLS.I Halberstadt CLS.I CLS.II (see also main sequence above) Junkers CLS.I

CS-	Zeppelin-Lindau CS.I

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