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The Russian Lun Ekranoplan during a test run on the Caspian Sea . A ground effect vehicle (GEV) is one that attains level flight near the surface of the Earth, making use of the aerodynamic interaction between the wings and the surface known as ground effect . Most known are the Soviet ekranoplanes , but names like wing-in-ground-effect ( WIG ) vehicle , flarecraft , sea skimmer , SkimMachine , or wing-in-surface-effect ship ( WISE ) occur.
Instructions for a traditional paper plane. A paper plane , paper aeroplane ( UK ), paper airplane ( US ), paper glider , paper dart or dart is a toy aircraft, usually a glider made out of paper or paperboard ; the practice of constructing paper planes is sometimes referred to as aerogami ( Japanese : kamihikōki ), after origami , the Japanese art of paper folding.