The vibration caused by the speeding up and slowing down of the driveshaft can be canceled by putting two Cardan U-joints next to each other.

Name: The vibration caused by the speeding up and slowing down of the driveshaft can be canceled by putting two Cardan U-joints next to each other.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

When two Cardan U-joints are placed in series with their axes carefully aligned, the angular velocity variations introduced by the first U-joint can be canceled out by the second, reducing vibration.

The Vibration Caused by the Speeding Up and Slowing Down