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prop help - cavitation
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<blockquote data-quote="aborgman" data-source="post: 89681" data-attributes="member: 1530"><p>Lets all remember there is a difference between "cavitation" and "ventilation" also...</p><p></p><p>Cavitation is when pressure decreases causing water to boil at much lower temperatures. When the bubbles from this boiling burst they can cause pitting on the prop. </p><p></p><p>Ventilation occurs when air from the water's surface or exhaust gases from the exhaust outlet are drawn into the prop blades. The normal water load is reduced and the prop over-revs, losing thrust. Most commonly occurs in turns, or with an excessively trimmed-out engine or drive unit. </p><p></p><p>-- </p><p>aborgman</p></blockquote><p></p>
[QUOTE="aborgman, post: 89681, member: 1530"] Lets all remember there is a difference between "cavitation" and "ventilation" also... Cavitation is when pressure decreases causing water to boil at much lower temperatures. When the bubbles from this boiling burst they can cause pitting on the prop. Ventilation occurs when air from the water's surface or exhaust gases from the exhaust outlet are drawn into the prop blades. The normal water load is reduced and the prop over-revs, losing thrust. Most commonly occurs in turns, or with an excessively trimmed-out engine or drive unit. -- aborgman [/QUOTE]
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