read an artical recently about the US Navy trying out fiber reinforced plastic prop shafts,they claim that it reduces transmission noise and magnetic signals to the surrouding water giving the vessels a stealth value that is vital for anti submarine vessls
dom
There is quite a lot of R&D being carried out on composite shafts and props. Bear in mind that modern high tec composites are a long way from traditional FRP. As you mentioned the advantages are reduction in acoustic and magnetic signatures but furthermore corrosion resistance is an added factor.
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