Ma­te­rial op­tions

Yachting World - - Front Page -

The ma­te­rial of choice for pro­pel­lers is an al­loy of nickel, alu­minium and cop­per, so-called alu­minium bronze, which of­fers bet­ter strength and cor­ro­sion re­sis­tance than other bronzes.

How­ever, there are a few no­table ex­cep­tions. Aus­tralia’s Sea­hawk man­u­fac­tures its Slip­stream fold­ing prop in low-car­bon 316L stain­less steel, sold in the UK by Steel De­vel­op­ments. “This be­ing the same metal as most prop shafts and saildrive in­ter­nal parts, it is less likely to pro­mote elec­trol­y­sis – the most com­mon killer of props,” says Steel

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