The Caudron Simoun was a 1930s French four-seat touring monoplane. It was used as a mail plane by Air Bleu, flew record-setting long-range flights, and was also used as a liaison aircraft by the Armée de l'Air during World War II.
C.500 Simoun IExperimental, one built.
C.520 SimounExperimental, one built.
C.620 Simoun IVExperimental, one built.
C.630 SimounInitial production version with Renault Bengali 6Pri engine, 20 built.
C.631 SimounModified version with a Renault 6Q-01 engine, three built.
C.632 SimounSimilar to C.631, one built.
C.633 SimounModified fuselage with a Renault 6Q-07 engine, 6 built.
C.634 SimounModified wing and take-off weight with either a Renault 6Q-01 or Renault 6Q-09 engine, 3 built.
C.635 SimounImproved cabin layout and either a Renault 6Q-01 or Renault 6Q-09 engine, 46 built and conversions from earlier versions.
C.635M SimounMilitary version with either a Renault 6Q-09 or Renault 6Q-19 engine, 489 built.
BelgiumBelgian Air Force FranceAir BleuArmée de l'AirAeronavale GermanyLuftwaffe (small numbers) Kingdom of HungaryHungarian Air Force United KingdomRoyal Air ForceNo. 267 Squadron RAF United StatesUnited States NavyGeneral characteristics
Crew: 1-2: pilot and (optional) co-pilotCapacity: 2 passengersLength: 9.10 m (29 ft 10 in)Wingspan: 10.4 m (34 ft 2 in)Height: 2.3 m (7 ft 7 in)Wing area: 16 m² (170 ft²)Empty weight: 755 kg (1,660 lb)Max. takeoff weight: 1,380 kg (3,040 lb)Powerplant: 1 × Renault 6Q-09 six-cylinder inverted inline engine air-cooled piston engine, 220 hp (160 kW)Performance
Maximum speed: 300 km/h (160 knots, 190 mph)Range: 1,500 km (810 nm, 930 mi)Service ceiling: 6,000 m (20,000 ft) 
