|Caudron R.11 at the Air Service, United States Army Air Service Production Center No. 2, Romorantin Aerodrome, France, 1918|
The R.11 was originally intended to fulfill the French Corps d'Armee reconnaissance category. Its design was similar to the Caudron R.4, but with a more pointed nose, two bracing bays outboard the engines rather than three, no nose-wheel, and a much larger tail. The engines were housed in streamlined nacelles just above the lower wing.
The French army ordered 1000 R.11s. Production began in 1917, with the first aircraft completed late in that year. In February 1918 the first Escadrille (squadron) R.26 was equipped. The last escadrille to form before the Armistice (and production ended abruptly) was R.246, at which point 370 planes had been completed.
The Caudron R.12 was an experimental version of the R.11, with a larger engine. Development ended when the Caudron R.14 variant appeared in August 1918.
Units using this aircraft
- Escadrille R.46
- Escadrille R.239
- Escadrille R.240
- Escadrille R.241
- Escadrille R.242
- Escadrille R.246
Data from The Complete Book of Fighters 
- Crew: 3
- Wingspan: 17.92 m (58 ft 9.5 in)
- Height: 2.8 m (9 ft 2.25 in)
- Wing area: 54.25 m2 (583.96 ft2)
- Empty weight: 1422 kg (3135 lb)
- Gross weight: 2167 kg (4777 lb)
- Powerplant: 2 × Hispano-Suiza 8Bba inline piston, 160 kW (215 hp) each each
- Maximum speed: 183 km/h (114 mph)
- Endurance: 3 hours 0 min
- Service ceiling: 5950 m (19520 ft)
- 5 7.7-mm (0.303-in) Lewis machine guns
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- Green and Swanborough 1994, p.111.