COAXIAL BI-ROTOR HELICOPTER WITH 'ULM' TYPE COUNTER-ROTATING BLADES

摘要

The invention relates to a helicopter with two coaxial rotor discs (1) and (2) with counter-rotating blades with constant pitch for one and, for yaw control, with variable pitch for the other using the spreader (10) with rods (11), (12) and fork (12 ') in the groove (4') of the control plate (4) sliding on the splined shaft (1 ') of the lower rotor disc ( 1). These rotors are driven by the centrifugal clutch motor (5) as well as the propeller (6) and its own clutch (7). The balance of the device in horizontal flight u change of slope is obtained by the displacement of its center of gravity by sliding the pilot seat (8) using the joystick (9). This helicopter according to the invention is particularly intended for linkage operations, observation, walks, schooling, amateur construction, drone.