Engineers at the Moscow Aviation Institute (MAI) have developed a design for a heavy amphibious aircraft with an unusual configuration that increases lift without increasing dimensions. The main feature is a closed diamond-shaped wing.
The front and rear wings are connected into a single structure, which reduces energy loss in the flow and increases flight efficiency.
This configuration allows the payload capacity to be close to the level of heavy transport aircraft — up to 100–120 tons — with dimensions of about 50 meters.
The fuselage also works as a lifting surface: it creates additional lift and provides stability on the water. Thanks to the wide base, MAI engineers proposed abandoning external floats.
The lower part of the hull is designed with a high deadrise (V-shaped form) and a special step (recess) — this facilitates acceleration and lift-off from the water. At low altitudes, the ground effect is additionally used, reducing fuel consumption.
In theory, this design can combine the capabilities of heavy transport aircraft and amphibians, simplifying work at unprepared bases and in remote areas.