The Technology Behind Shocks - Shock Value
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The Houdaille design consists of a chamber filled with fluid that provides the dampening action within the shock. The chamber is divided into two equal chambers by a stationary shaft. A rotating winged shaft activated by the shock's lever rotates back and forth, forcing fluid back and forth between the two chambers. The shock's resistance depends on how rapidly the fluid is moved between the chambers and the flow is regulated by the size of the opening between the two. That regulation is handled by an adjustable needle valve, just as used in the adjustable tube shocks you see today. View Related Article
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