7. Propeller maintenance

7.1 Various causes of propeller damage

New propellers have a very good surface finish (roughness " 5 µm)*, but the surface finish deteriorates to a greater or lesser extent in service, depending on whether the vessel is operating in warmer or cooler seas, or in rivers. Deterioration also depends on the time spent at sea, in harbor or in port.

Note :

*There are several standards for defining surface roughness (see articles Characterization and measurement of measurement microgeometries [R 1 230]...

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References

(1) - VAN LAMMEREN (P.A.), VAN MANEN (J.D.), OOSTERVELD (M.W.) - The wageningen B-screw series. - Society of Naval Architects and Marine Engineers (NSMB), 1969.
(2) - CARLTON (J.S.) - Marine Propellers and Propulsion. - Butterworth...