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  1. #1
    actionoptics's Avatar
    actionoptics is offline Registered User
    Location : Butts Ash Near Hythe,Hants,UK
    Join Date
    Mar 2004
    Posts
    412

    Default Propellor stopped singing.

    Brand new prop from Bukh would "sing" a most intrusive note between 1800 and 2200 revs.
    Today put boat on slipway and washed the hull but also followed the advice of
    a marine engineer regarding the prop.
    He told me to measure the thickness of the propellor half way around one blade
    (which turned out to be 3mm) and then on one edge only of each blade,
    file off one third of the thickness ( in my case 1mm) at an angle of 45 degrees.
    It has worked. Completely elliminated the noise.
    You know you are getting old when your back goes out more than you.http://www.actionoptics.co.uk[/url]

  2. #2
    ianat182 is offline Registered User
    Location : boat Hamble,home Fareham
    Join Date
    Jul 2008
    Posts
    2,320

    Default

    Interesting, sounds similar to the vibrations on rudders where the trailing edge is squared to improve the water flow. Which edge of the prop blades did you actually reduce, the leading or trailing edge?

    ianat182

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