Nikon's patent applications for mirrorless camera system?

Discussion in 'Digital SLR' started by Bruce, Nov 5, 2010.

  1. A modern large cargo ship would be Marconi rigged, but even square
    sailers weren't strictly down wind. More across, if you will. Some could
    sail at a bit better than 90 degrees off the wind, but effectively this
    means they can't go dead up wind no matter how many tacks they make.
    John McWilliams, Nov 19, 2010
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  2. Bruce

    J. Clarke Guest

    According to Alan Villiers, "6 compass points from the wind". Howard
    Chappelle says 5.5. I've read that Nelson's logs report tacks through
    90 degrees. Put it all together and one can say that an average ship in
    good hands could point within 45-50 degrees of the wind. STS Mir, a
    conventional full-rigged ship designed in the 1980s, can point 38.5
    degrees. Maltese Falcon, using the Dynasail design, a thorough
    modernization of the square rig, has demonstrated 38.

    The notion that a square rigger can't beat to windward just plain flies
    in the face of history.

    As for a modern cargo vessel having a Marconi rig, that's a possibility,
    however historically fore and aft rigs haven't done too well on large
    cargo vessels--compare the histories of the six and seven masted
    schooners with those of the largest square-riggers.
    J. Clarke, Nov 19, 2010
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  3. Bruce

    Wilba Guest

    That's very interesting Neil, but what does it have to do with the question?
    Wilba, Nov 21, 2010
  4. Bruce

    J. Clarke Guest

    He obviously doesn't understand that it takes a bit more effort to
    manage a 400 foot long 11,000 ton merchant ship than it does to manage a
    40 foot long 12 ton oyster boat.

    And in point of fact he's wrong about the square rigger, too. One
    person can operate the 289 foot long "Maltese Falcon", a thoroughly
    modern square rigger, although her size, value, and technological
    complexity preclude single-handed passages.
    J. Clarke, Nov 21, 2010
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