Junkers J 11
(Military Designator: CLS-I)
naval survey aircraft, F/F: 23rd Oct. 1918, 3 built JFA
twin seated cantilever mono seaplane, corrugated Duralumin construction

Historical Data:

In 1918 Hugo Junkers started discussions with the German Navy about utilizing his all metal aircraft. Junkers purposed a derivate of his J10 aircraft as a naval reconaissance aircraft. One design was the conventional J10 as a cantilever monoplane, a second design saw the J10 as a double wing aircraft. Junkers managed to convience the German Navy, that a cantilever monoplane version would satisfy their demand and the German Navy put an order for three test aircraft.

Two aircraft of the J10 production line (7501 and 7503) were modified to J11 standard. They got a new rear fuselage and a larger wing, as well as two swimmers. On October, 23rd 1918
Richard Thiedemann of the German Navy took off for the first flight of the Junkers J11. The test flights continued after the end of WW I. For more stability a fixed tail was adapted to the aircraft. This fixed triangle tail became typical for the early postwar aircraft designs of Junkers, i.e. the F13.

Due to the end of WWI no more J11 aircraft were ordered by the Navy. A total of three aircraft were modified to the J11 standard. Experiences from the J11 test programme were further utilized for the A20- and F13 seaplane versions after WW I.

Technical Data:
Aircraft year engine length
in m
in m
wing area
im sqm
net weight
in kg
in kg
seats speed
in km/h
in km
J 11 (CLS-1) 1918 Benz DIIIa (136kW) 8,80 12,75 26,60 915 505 1 pilot +
1 seat
180 500

Continue at the Hugo Junkers Homepage with:
J11 Production List <>

Further Reading at other Sites:
I MS lennundus (Estonian Site, images, data, text)

25th December 2002
The Hugo Junkers Homepage
at http://www.junkers.de.vu
Horst Zoeller, Germany, July 1996

visitors since October 2000
Counter by WebCounter)