Originally posted by SharkPilot
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All that said, the screws are not the point of emphasis with regard to absorbing the increased torque and thrust generated by operating those screws at higher RPM. It's not about the screws; it's all about the installed Kingsbury Thrust Bearings found on pages 96 and 97 at the link here. Rather than me explain it, it's an easy read. Take a look and then come back with whatever questions you have and I'll help you out, but basically it comes down to the greater the shaft horse power generated by the main engines found on those two ship classes, the stouter must the main thrust bearings be.
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