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Which risk increases when a high-speed hydrofoil operates beyond design limits?

A)Elevated structural fatigue cracking
B)Increased galvanic corrosion rates
C)Drive motor armature demagnetization
D)Rudder servo motor overheating

💡 Explanation

Elevated structural fatigue cracking increases because exceeding design speed induces cavitation; the mechanism is turbulent collapse of vapor bubbles near flexing sections, which induces extreme cyclical stress. Therefore fatigue increases, rather than corrosion or component failures, because these are not directly stress related.

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