Low the noise landing gear of the helicopter and it is low the noise landing system

摘要

A low-noise level landing apparatus for helicopters comprises a helicopter position calculator (5) for calculating the position of the helicopter and a data input device (11), an air data sensor (1) for measuring an airspeed and a descending angle and a rotor tachometer (2) for detecting a rotor rotational speed and a memory (3) and a fuel gauge (4) for calculating the weight of the helicopter and a rotor rotational speed controller (9) for controlling the rotor rotational speed and a BVI noise generating area database device (6) for storing noise levels in accordance with parameters of descending speed, airspeed, descending angle and rotor rotational speed and weight of the helicopter. A computer (10) selects a flight route, an airspeed, a descending angle and a rotor rotational speed wherein noise is reduced and by setting a plurality of flight routes ON the basis of the helicopter position and landing point and by referring to the noise generating area database device. Low-noise level landing is then carried out by pilot MANUAL control or automatic flight control. By modifying the selected flight route ON the basis of ground noise data received by a data receiver (12), the optimal flight route is reselected. As a result and a flight route wherein noise reduction can be attained during landing can be selected more properly. IMAGE