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Why do rotor blades flap?
To equalize lift across the rotor disc, the advancing blade flaps up and the retreating blade flaps down. Flapping modifies the resultant relative wind by moving with or against the induced flow, which changes a blade’s angle of attack.
How do coaxial rotors yaw?
Coaxial rotors solve the problem of main rotor torque by turning each set of rotors in opposite directions. The opposite torques from the rotors cancel each other out. Rotational maneuvering, yaw control, is accomplished by increasing the collective pitch of one rotor and decreasing the collective pitch on the other.
How do coax rotors work?
Coaxial rotors are two main rotors mounted on one mast, sharing the same axis of rotation but turning in opposite directions, one on top of the other. The control along the vertical axis is produced as a result of different lifts, thus differential torque, of the two rotor discs.
What kind of helicopter is the Ka-50 Black Shark?
The Ka-52, the two-seater version of the Ka-50. The Ka-50 Black Shark helicopter, developed by Kamov Helicopters JSC, carries the Nato codename Hokum A, with Hokum B the two-seat version, Ka-52. Ka-50 is also known as Werewolf.
How are the rotors of a coaxial blade different?
In a coaxial design, both rotors turn in opposite directions, so their tilts will be in opposite directions too: the clockwise-turning one will tilt right, and the anticlockwise-turning one will tilt left (the actual locations of maximum bending are not quite as clear cut because of blade inertia, but this serves as a basic explanation).
Are there disadvantages of coaxial rotors in helicopters?
The unique configuration of twin coaxial rotors presents both advantages and disadvantages, and the relative weight of each must be considered in light of the aircraft’s mission. I am going to assume the reader has a basic understanding of helicopter controls (cyclic, collective, antitorque).
Can a coaxial helicopter have a movable rudder?
2 Answers. Source: simhq.com Coaxial helicopters (like Kamov Ka-25) do have movable rudders like aircraft for use in forward flight as it reduces the main rotor adjustment required and is more effective.