Abstract: A helicopter includes a mast, a main rotor, an engine, a radiator, and a body cover. The engine and the radiator are housed in the body cover. The body cover includes a first opening penetrated by the mast, a second opening that is located at a more forward position than the first opening and configured to introduce air to the radiator, and a third opening located at a position that is more forward than the first opening and more rearward than the radiator. The third opening is located at a higher position than the second opening and the radiator.

Abstract: A helicopter includes a mast, a main rotor, an engine, a radiator, and a body cover. The engine and the radiator are housed in the body cover. The body cover includes a first opening penetrated by the mast, a second opening that is located at a more forward position than the first opening and configured to introduce air to the radiator, and a third opening located at a position that is more forward than the first opening and more rearward than the radiator. The third opening is located at a higher position than the second opening and the radiator.

Abstract: An airframe (1a) having a main body (4) and a tail body, a main rotor (6) disposed above the main body (4) and driven by an engine inside the airframe (1a), and a tail rotor disposed in a rear part of the tail body (5) are provided. A pair of support legs (8, 8) at left and right sides extending downward from left and right sides in a lower part of the main body (4) and a pair of skids (9) on left and right sides provided on the lower ends of the support legs (8) and positioned out of the main body (4) in the width direction of the airframe (1a) in a front view are provided. A radiator (71) at a position more frontward than the front ends of the skids (9) in a side view, formed extendedly downward from the vicinity of a bottom surface (83) of the front part of the main body, and having wind reception surfaces oriented to the longitudinal direction of the airframe is provided.