The Beriev Be-2500 Neptun is a super heavy amphibious transport aircraft that, as of 2007, was in design and development by Russian design firm Beriev. The maximum takeoff weight is estimated at 2500 tons, hence its name.

The Aerocon Dash-1.6 wingship was a proposed American ground-effect vehicle intended to carry large cargos and thousands of passengers over long distances at near-aircraft speeds.