|First flight||December 12 1920|
|Primary users||Franco-Roumaine, CMA
|Number built||ca. 41|
The Bleriot-SPAD S.33 was a small French airliner developed soon after World War I. A great success, the S.33 dominated its field throughout the 1920s, initially on CMA's Paris-London route, and later on continental routes serviced by Franco-Roumaine. The aircraft was a biplane of conventional configuration whose design owed much to the Blériot company's then-recent fighter designs such as the S.20. Four passengers could be accommodated in an enclosed cabin within the monocoque fuselage, and a fifth passenger could ride in the open cockpit beside the pilot.
One interesting development was a sole example converted by CIDNA to act as a blind-flying trainer. A set of controls was installed inside the passenger cabin, the windows of which had been blacked out.
- S.33 -Single-engined passenger transport aircraft, powered by a 260-hp (194-kW) Salmson CM.9 radial piston engine. 41 aircraft built.
- S.46 - Improved version of the S.33, powered by a 370-hp (276-kW) Lorraine-Dietrich 12Da engine. 38 built and sold to the Franco-Roumaine Company.
- S.48 - A single S.33 temporarily re-engined in 1925, fitted with a 275-hp (205-kW) Lorraine engine.
- S.50 - Luxury version with passenger cabin enlarged to six seats, fitted with a 300-hp (224-kW) Hispano-Suiza 8Fb engine. Three were converted from S.33s, plus two all-new aircraft.
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- Crew: one pilot
- Capacity: 5 passengers
- Length: 9.08 m (29 ft 10 in)
- Wingspan: 11.66 m (38 ft 3 in)
- Height: 3.20 m (10 ft 6 in)
- Wing area: 42.2 m2 (454 ft2)
- Empty weight: 1,050 kg (2,315 lb)
- Gross weight: 2,062 kg (4,546 lb)
- Powerplant: 1 × Salmson CM.9 radial engine, 194 kW (260 hp)
- Maximum speed: 180 km/h (112 mph)
- Cruising speed: 160 km/h (100 mph)
- Range: 1,060 km (670 miles)
- Service ceiling: 3,800 m (12,470 ft)
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 163.
- World Aircraft Information Files. London: Bright Star Publishing. pp. File 890 Sheet 42.
- "The Spad "Berline" S.33 bis" (PDF). Flight XIII (27): 460–462. July 7, 1921. No. 654. Retrieved April 26, 2012. Contemporary technical description of the Blériot-SPAD S.33, including photographs and drawings.