Tandem wing

A tandem wing aircraft has two main wings, with one located forward and the other to the rear. Both wings contribute to lift. In cases where the rearmost tandem wing is smaller than the forward wing, such that it resembles an oversized tailplane, it is referred to as a "Delanne wing" - from Maurice Delanne, a French designer of tandem wing aircraft. In a tandem wing design the lift vectors on the two wings are spread far apart longitudinally, allowing them to act together to achieve stability and control.