FIELD: machine building.
SUBSTANCE: invention can be used in engine building. Star-shaped two-stroke aircraft engine includes crankcase (2), crankshaft crank located in crank chamber (3) of crankcase, and three piston-rod groups. Connecting rods (10) are pivotally mounted by their lower heads on one crank pin (7) and are pivotally connected to pistons (13) by means of piston pins. Cylinders (1) form cylinder-piston group with piston (13) of crank mechanism, are installed on crankcase (2) radially in equidistant intervals around axis of crankshaft. Sleeve (15) of each cylinder (1) is equipped with inlet box (17) for contour blowing of cylinder with air by means of external supercharger. Box (17) is made in the form of a hollow annular volume located along the radius of the cylinder and having inlet and outlet openings (18) and (19) on the outer side of cylinder liner (15), as well as blowing openings (20). Blowing openings (20) are configured with the specified interval along the perimeter of the circumference of the side surface of cylinder liner (15) with the possibility of providing contour blowing of the working chamber of cylinder (1) at the working position of piston (13) corresponding to the lower dead point.
EFFECT: reduction of specific consumption of fuel and oil.
3 cl, 3 dwg
