FLIGHT VEHICLE

There is provided a flight vehicle including: a wing unit; a main body unit; a battery that is arranged in the wing unit; a payload that is arranged in the main body unit; a radiator; and a heat pipe that exchanges heat between the battery, the payload, and the radiator and that has a check valve which causes a hydraulic fluid to be circulated to transfer the heat of the battery to the payload and the radiator. There is provided a flight vehicle in which the heat pipe has a battery corresponding portion that corresponds to the battery, a radiator corresponding portion that corresponds to the radiator, a payload corresponding portion that corresponds to the payload, a first circulation portion that extends from the battery corresponding portion, branches at a branch unit, and is connected to each of the radiator corresponding portion and the payload corresponding portion, a second circulation portion that extends from the payload corresponding portion and is connected to the radiator corresponding portion, and a third circulation portion that extends from the radiator corresponding portion and is connected to the battery corresponding portion.