A useful aircraft model with an unusual design has been invented in Russia, where lift is generated not only by the wing but also by the fuselage itself. The patent has already been registered in the official FIPS database.
The authors proposed constructing the aircraft according to the tandem-triplane scheme. The fuselage will have side protrusions to which wings located at different heights are attached.
The middle wing is designed as a high-wing, and the tail wings are designed as a low-wing and placed one under the other. One of the tail wings is made fully pivoting.
The key feature is the shape of the fuselage and the air intake. The lower surface under the cockpit is sealed and inclined towards the incoming flow, and the upper surface is equipped with a prism-shaped air intake. It directly directs air into the engines located above the cockpit.
After exiting the engines, the flow enters a special air duct formed by the surfaces of the fuselage and an inclined wall. Due to the Coanda effect, the jet adheres to the surface, reduces pressure from above, and creates additional lift. As a result, the fuselage begins to function as an aerodynamic element, rather than a passive "tube."