In the Lazair application the 185 was used to drive two propellers stacked together in biplane configuration.

The L 65 had a single-bay, staggered biplane configuration and was constructed of wood with a plywood skin.

After first flying as a monoplane, the third prototype was converted to biplane configuration, flying in that layout on 17 March 1924.

The project was cancelled as the biplane configuration did not offer any advantages over contemporary monoplane fighter designs.

Designed by Husnik and Vlasak, it was of conventional biplane configuration.

The aircraft marked a departure from the traditional biplane configuration for a transport aircraft, instead featuring a single, low set, all metal cantilever wing.

All other standard aircraft were of biplane configuration, and the first monoplane fighter (the Boeing P-26A) did not become operational until eight months later.

Improved structural techniques and materials and the quest for greater speed made the biplane configuration obsolete for most purposes by the late 1930s.

The figure shows the biplane configuration.