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The Lioré et Olivier LeO 9 was a French monoplane fighter built in 1923.

LeO 9
Role	Fighter Type of aircraft
National origin	France
Manufacturer	Lioré et Olivier
First flight	1923
Number built	1

Design and development

The LeO 9 was a low wing monoplane fighter of all-metal construction using a Joukowski aerofoil.[1] Despite excelling in flight tests, the LeO 9 was not ordered into production.[2]

Specifications

Data from [3]

General characteristics

• Crew: one
• Length: 6.59 m (21 ft 7 in)
• Wingspan: 10.94 m (35 ft 11 in)
• Height: 2.18 m (7 ft 2 in)
• Wing area: 17 m² (180 sq ft)
• Airfoil: Joukowski airfoil[1]
• Gross weight: 1,175 kg (2,590 lb)
• Powerplant: 1 × Hispano-Suiza 8Fb 8-cylinder V-shaped liquid cooled, 220 kW (300 hp)
• Propellers: 2-bladed

Performance

• Maximum speed: 280 km/h (170 mph, 150 kn)at sea level
• Service ceiling: 7,000 m (23,000 ft)

References

Bibliography

• Riccio, Philippe (November–December 2019). "De l'avion Eiffel au LeO 9: Le chasseur trop en avance sur son temps" [From the Eiffel Aircraft to the LeO 9: The Fighter Too Far in Advance of Its Time]. Avions (in French) (232): 67–79. ISSN 1243-8650.

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