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.