How to make catamarans to carry heavy weight

Discussion in 'Boat Design' started by Steptepha55, Nov 7, 2011.

  1. Silver Raven
    Joined: Oct 2011
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    Location: Far North Queensland, Australia

    Silver Raven Senior Member

    Catamaran weight/carrying???

    Gooday 'Step' - Reduce the weight of the catamaran - increase the capacity to carry weight - slightly - cant the hulls at least 7* - foil it or step it - then the more efficient you sail it the faster it will go in relation to the weight carried. OH & don't follow all the info above - cause some of it is seriously flawed. Ciao, james (yes - him with the big-stirring-stick)
     
  2. noli
    Joined: Jul 2012
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    Location: New York

    noli Junior Member

    Where would I get a professional design for the following specs:

    1. a cat around 35 feet long
    2. can carry 4 tons
    3. uses outboards
    4. fuel efficient hull
    5. would cruise at 25 knots
    6. minimum range of 210 miles
     
  3. FAST FRED
    Joined: Oct 2002
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    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    "would cruise at 25 knots"

    Cat or not you will be about 1mpg at this speed.

    25GPH at $4.00 per gallon is $100 per hour just in fuel.

    250 miles (some reserve range) would require about 250 gal of fuel, a good portion of your 4 ton payload.

    Speed costs , you sure 7-10k wouldn't be OK?

    FF
     
  4. Alik
    Joined: Jul 2003
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    Location: Thailand

    Alik Senior Member

    Here You can
     
  5. noli
    Joined: Jul 2012
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    Location: New York

    noli Junior Member

    .

    Thanks Fred :)

    Your calculation of $1 per mile, if accurate, would work very well. The location is outside the US with fuel costing about $3/gal.

    This is a commercial vessel, the run is actually 70 miles each way, carrying passengers & cargo. The cat shall have a capacity of 21 heads (~1 ton) + cargo (~2 tons) + fuel (~1/2 ton)

    The passengers & cargo delivery would be paying for the operational costs.


    Where would I get a professional design for the following specs:

    1. a cat around 35 feet long
    2. can carry 3.5 tons (incl fuel)
    3. uses outboards
    4. fuel efficient hull
    5. would cruise at 25 knots
    6. minimum range of 170 miles



    .
     
  6. noli
    Joined: Jul 2012
    Posts: 32
    Likes: 0, Points: 6, Legacy Rep: 10
    Location: New York

    noli Junior Member

    .

    Thank you Alik!

    We will look at the vessels there for possible usage.

    Alik, are you associated with any commercial hull builders?




    .
     
  7. Alik
    Joined: Jul 2003
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    Location: Thailand

    Alik Senior Member

    Formally not, but we work with builders in about 10 countries...
     

  8. FAST FRED
    Joined: Oct 2002
    Posts: 4,519
    Likes: 110, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    Your calculation of $1 per mile, if accurate, would work very well. The location is outside the US with fuel costing about $3/gal.

    Don't read in whats not there! , my guesstimate is 1 GALLON per mile .

    "Cat or not you will be about 1 mpg at this speed."

    That's at least $3.00 per mile . $75 for 25 miles in calm sea state.

    FF

    To go cheap you might need to rethink ,
     
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