Coriolis Effect
What is the Coriolis Effect ?
The coriolis effect is conservation of angular momentum being seen in action. If a blade which is free to flap, does indeed flap then its center of mass (C Of M) will move closer to, or further away from the center of rotation.
If angular momentum is conserved, the as the C Of M moves closer to the center the angular velocity will increase. Conversely if the C Of M moves away from the center the angular velocity will reduce.
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This effect can clearly be seen when an ice skater is spinning on the spot. If their arms are extended then they spin slower, if their arms are pulled in close to their body they spin faster.
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