Image: Potez X – By Unknown author, Public Domain, (Wikipedia)
The Potez X was a French three-engined general-purpose transport aircraft developed in the early 1920s by the Potez company. Designed for colonial service and both civil and military transport roles, the aircraft marked an early attempt to create a reliable multi-engine passenger and cargo platform in post–World War I France.
Development
The Potez X was a large biplane featuring a fixed nosewheel undercarriage with an additional tailskid, an unusual configuration for the era. It was powered by three piston engines: the initial version used three Hispano-Suiza 8Aa V8 engines, each producing 140 hp (104 kW). Two engines were mounted on struts between the wings, and the third was positioned at the nose of the aircraft.
The aircraft had an enclosed cabin for 10 passengers, while the pilot operated the aircraft from an open cockpit located behind the cabin. Later improvements included replacing the original engines with more powerful Hispano-Suiza 8Ab engines for improved performance and range.
The design was further developed into two additional versions: the Potez X B, a military transport variant, and the Potez X C, a civil version with upgraded 280 hp (209 kW) Hispano-Suiza 8Bec engines.
Although relatively few were built, the Potez X formed the basis for subsequent airliner designs, including the Potez XVIII and Potez XXII, both of which retained the triple-engine layout and were aimed at longer-distance commercial routes.
Variants
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Potez X A
Original civil version powered by three 140 hp (104 kW) Hispano-Suiza 8Aa engines. -
Potez X B
Military transport variant equipped with three 300 hp (220 kW) Hispano-Suiza 8Fb engines. -
Potez X C
Commercial variant powered by three 280 hp (209 kW) Hispano-Suiza 8Bec engines.
Specifications (Potez X A)
General characteristics
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Crew: 1
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Capacity: 10 passengers
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Length: 12.95 m (42 ft 6 in)
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Wingspan: 18.40 m (60 ft 4 in)
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Height: 4.15 m (13 ft 7 in)
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Wing area: 94 m² (1,010 sq ft)
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Empty weight: 1,800 kg (3,968 lb)
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Gross weight: 3,090 kg (6,812 lb)
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Powerplant: 3 × Hispano-Suiza 8Ab V8 engines, 130 kW (180 hp) each
Performance
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Maximum speed: 165 km/h (103 mph, 89 kn)
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Cruise speed: 132 km/h (82 mph, 71 kn)
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Range: 1,000 km (620 mi, 540 nmi)
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Service ceiling: 5,500 m (18,000 ft)
Legacy
Though limited in production, the Potez X contributed to France’s interwar aviation development by providing a flexible and scalable platform adaptable for both civil and military uses. Its design lineage can be traced through subsequent aircraft in the Potez lineup and reflected France’s broader ambitions for global air transport and colonial logistics in the 1920s.
References
Notes
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Orbis Publishing. The Illustrated Encyclopedia of Aircraft, Part Work 1982–1985, p. 2760.
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Parmentier, Bruno. “Potez XVIII“. Aviafrance.com (in French). Retrieved 24 September 2014.
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Parmentier, Bruno. “Potez XXII“. Aviafrance.com (in French). Retrieved 24 September 2014.
Bibliography
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Orbis Publishing. The Illustrated Encyclopedia of Aircraft. Part Work 1982–1985.
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