Lioré et Olivier LeO 20

The Lioré et Olivier LeO 20 was a French night-bomber aircraft built by Lioré et Olivier.

Development
The LeO 20 was a development of the LeO 122 prototype. It won the 1926 French ministry competition for a new night-bomber, and received an order for 50 aircraft. The first were delivered at the end of 1926 and flight tested at Villacoublay in 1927. A total of 311 aircraft were delivered to the French air arm, ending in December 1932.

Variants

 * LeO 20:twin-engine night bomber with Gnome-Rhône 9Ady engines (320 built)
 * LeO 201:re-designation for parachute trainers converted from LeO 20
 * LeO 203:four-engine version with Gnome-Rhône 7Kb engines
 * LeO H-20/4:floatplane version of LeO 203
 * LeO 206:production version of LeO 203 with revised nose, ventral "balcony" and tail gun (37 built)
 * LeO 207:similar to LeO 206 but with different nose and smaller "balcony" (3 built)
 * LeO 208:similar to LeO 20 but with enclosed cabin and Gnome-Rhône 14Mrs engines

Operators/Units using this aircraft

 * French Air Force
 * 21st Regiments d'Aviation
 * 22nd Regiments d'Aviation
 * 12th Regiments d'Aviation
 * 34th Regiments d'Aviation
 * Aeronautique Militaire School
 * French Navy
 * Royal Romanian Air Force
 * Royal Romanian Air Force
 * Royal Romanian Air Force