The Lioré et Olivier LeO 9 was a French monoplane fighter built in 1923.
Design and development The LeO 9 was a low wing monoplane fighter of all-metal construction using a Joukowski aerofoil. Despite excelling in flight tests, the LeO 9 was not ordered into production.
Specifications
References
Bibliography Hartmann, Gérard. Les Avions Lioré Et Olivier. Boulogne-Billancourt, France: ETAI. 2002. (in French)