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Blade Coriolis force and its azimuthal variation
Answer 1. The blade Coriolis force is the force which develops as a result of the combination of two velocities: the circumferential velocity of
the blade center of gravity and the radial velocity which develops as a result of variation of the flapping angle.
The Coriolis force of the advancing blade is directed in the direction of rotation of the motor and reaches its maximal value at the 90° azimuth.
The Coriolis force of the retreating blade is directed opposite the rotor rotation and reaches its maximal value at the 270° azimuth.
Answer 2. The Coriolis force is an inertial force which arises in the forward flight regime as a result of the combination of the circumferential velocity of the blade center of gravity and the helicopter translational flight velocity. For the advancing blade, this force is directed forward and reaches its maximal magnitude at the 90° azimuth; for the retreating blade it is directed aft and reaches its maximal value at the 270° azimuth.
Answer 3. The Coriolis force is an inertial force which arises from
flapping motions resulting from the combination of the angular velocity of motion of the blade center of gravity and the vertical flapping velocity.
For the advancing blade, this force is directed upward and reaches its maximal value at the 90° azimuth; for the retreating blade, it is directed downward and will be maximal at the 270° azimuth.
