28+ Sternwheeler Project

Discussion in 'Boat Design' started by ecodevoman, Jun 8, 2011.

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  1. PaulTGarrett
    Joined: Mar 2010
    Posts: 8
    Likes: 1, Points: 0, Legacy Rep: 15
    Location: Pinellas Park, FLA

    PaulTGarrett Junior Member

    Hey Tinhorn! Thanks for those pages! Good reading! Those are basically the same calculations that I saw on the other thread but they were from a different poster and a different book. I haven't had time to play with the numbers yet but will be interesting to see the difference between "real math" and "what looks proportional"...
     
    PaulTGarrett, Mar 25, 2012
    #16
  2. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    More efficiency is supposed to provided by articulating paddles.

    Where the water is pushed , but not lifted .

    Have seen drawings and it does not look too hard to build.

    FF
     
    FAST FRED, Mar 25, 2012
    #17

  4. tinhorn
    Joined: Jan 2008
    Posts: 575
    Likes: 20, Points: 18, Legacy Rep: 310
    Location: Massachusetts South Shore.

    tinhorn Senior Member

    If memory serves, the old-time calculations indicated increased efficiency of 15-20% for articulating paddles. And because they "slap" less than static paddles, they transmit less vibration and noise to the boat.
     
    tinhorn, Mar 25, 2012
    #18
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