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Ship launching

  1. Jan 15, 2008 #1

    I saw from youtube clips that dry dock ship launching use these wooden(?) contraptions. Do they cause damage to the paint coat of the ships?

  2. jcsd
  3. Jan 15, 2008 #2


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    No thats why you use wood.
    The boats don't generally slide on the wood, the sit on cradles that slide on greased rails.
  4. Jan 16, 2008 #3
    So you are saying that there is not a slightest damage to the coating in all cases?

  5. Jan 16, 2008 #4


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    What do you propose that they use to cause LESS damage?
  6. Jan 16, 2008 #5
    Perhaps we could use a material with low coefficient of friction as a material for the ramp, as described by Mr./Mdm mgb_phys. Eliminate also, altogether, the use of grease.
    Fundamentally, I just would like to know if existing methods scratch the paintwork.

  7. Jan 16, 2008 #6


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    It's been over 30 years, but when i had some involvement with boat building(intracoastal, and river pushboats) the below waterline coatings, were mixes of paints and resins, and some flourlike metals, that had to be continually stirred with a air motor while in the paintpot.
    These finishes, when cured, were as hard or harder than the metal they covered.

    Not sure but i would think that finishes today might be even better.
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