Ship launching

  1. Hi!

    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. mgb_phys

    mgb_phys 8,809
    Science Advisor
    Homework Helper

    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. So you are saying that there is not a slightest damage to the coating in all cases?

  5. Integral

    Integral 7,288
    Staff Emeritus
    Science Advisor
    Gold Member

    What do you propose that they use to cause LESS damage?
  6. 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. RonL

    RonL 901
    Gold Member

    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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