Abstract: A compact ultralight aircraft (10) comprising two coaxial counter-rotating rotors (11, 11?) to each one which at least two rigid blades (12) are connected, centrally ducted in a cylindrical structure (13), of a radius substantially slightly greater than the size of said rigid blades (12), and rotated by an engine (14), through driving means (21), a compartment (15) rigidly connected to the cylindrical structure (13), the aircraft (10) further comprising at least two series of parallel rows of flaps (18?, 18?) arranged orthogonal to each other to form a grid, the at least two series of parallel rows of flaps (18?, 18?) being joined and contained in the cylindrical structure (13) in various cylindrical sections one over the other, each of the parallel rows (18?, 18?) being composed by at least two flaps (18?A, 18?B; 18?A, 18?B)in series.

Abstract: A machine for cutting and triturating grass and other vegetable products, comprising a protection element (30), equipped with wheels, rollers or slides (35) and containing at least one pair of cutting assemblies (15, 16), wherein one cutting assembly (15) comprises blades of the lawn mower type or of the spoon-like type (21) and one cutting assembly (16) comprises shredding type blades (22), and a deflecting element (25, 125, 25?) being placed between the two cutting assemblies (15, 16) which causes the detachment of portions of the cut vegetable products from an inner wall of the protection element (30) and delivers them above the cutting assemblies (15, 16), said deflecting element (25, 125, 25?) protruding toward the inside of the protection element (30).