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Originally Posted by Kurushio
On a related note...why do subs have a maximum speed of 20 knots surfaced and cavitate as soon as you reach 10 knots (surfaced). Can subs go round caavitating everywhere...? In real life, wouldn't that ruin the props?
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Cavitation at depth is a much more severe process than cavitation near the surface. The collapse of the bubble happens more quickly and violently - it's called compressed cavitation. That's where your prop damage occurs. It also sounds much different, like a very loud "squick squick squick" as opposed to the more constant white noise sound of normal cavitation.