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Simple Easy to Build, high capacity boat

Home Forums Archive Structure Designs Simple Easy to Build, high capacity boat

This topic contains 6 replies, has 3 voices, and was last updated by Avatar of elspru elspru 4 years, 5 months ago.

Viewing 7 posts - 1 through 7 (of 7 total)
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  • #1185
    Avatar of elspru
    elspru
    Participant
    So I've designed a very simple boat design.
    
    figured having a weighted keel is lugging dead weight
    and makes it sinkable
    so decided on a multi-maran with geometric balancing.
    
    As a seasteader one has lots of stuff,
    and the boat should carry it,
    so decided on big hulls.
    
    wanted a "perfect" boat,
    so made it based on the Phi ratio.
    It fits in a "water drop" shape.
    
    

    Photobucket

    It's a hexagonal boat,
    these are some of the formulas used in its design
    
    note 1 3 4 7 is Golden Fibonacci sequence.
    
    golden          = 1.618034
    baseLength      = 120e-12*16^8
    hullLength      = baseLength*9 -- 8*3 -- *14 --(8*3)
    hullBeam        = hullLength/3
    hullBeamPoint   = hullLength/golden
    hullMastPoint   = hullLength/golden^2
    hullBowBeam     = hullLength/7
    hullTransomBeam = hullLength/4
    foreSupportBeam = (hullBeam + hullBowBeam) /2
    foreRibPoint    = hullLength/golden^3 -- hullLength - hullLength/golden
    
    heightFormula beam = hexagonHeightFormula beam
    hexagonHeightFormula beam = tan(pi/6)*beam*2 -- peculiar for hexagons
    hullHeight         = heightFormula hullBeam
    hullBowHeight      = heightFormula hullBowBeam
    hullTransomHeight  = heightFormula hullTransomBeam
    foreSupportHeight  = heightFormula foreSupportBeam
    
    -- akas
    foreAka         = hullLength/golden^3
    aftAka          = hullLength/golden
    
    -- triangle hypoteneus
    hullBowSide     = hullBowHeight/2
    hullBeamSide    = hullHeight/2
    hullTransomSide = hullTransomHeight/2
    foreRibSide     = foreSupportBeam/2
    
    -- ama
    -- are backwards in refrence to hull
    amaLength       = hullLength/golden
    
    
    here's a pic of a trimaran cardboard model.
    
    

    Photobucket

    It's also designed for cold or hot weather,
    especially cold since in Canada,
    including skiing on ice,
    operable from inside.
    
    here are some dimensions (in meters)
    for a 15 foot model I'm planning on making
    
    elspru@ji-zma:~/4/boat$ runhaskell Boat.hs
    Hexagonal Trimaran Boat
    baseLength 0.51539607552
    hullLength 4.63856467968
    hullBeam   1.54618822656
    hullHeight 1.785384377644492
    hullForeHyp 2.9054537434342964
    hullAftHyp 1.8336729253636679
    hullBowBeam 0.6626520970971429
    hullTranBeam 1.15964116992
    hullVolume 6.378650361140839
    hullArea   22.442947454698736
    amaLength  2.8667906111243644
    amaHeight 1.1034282206952957
    amaBeam    0.9555968703747881
    amaForeHyp 1.1562827480207112
    amaAftHyp  1.8102794859540134
    amaVolume  1.5057950543974563
    amaArea    9.318916679810041
    totalVolume 9.390240469935751
    totalArea    41.080780814318814
    
    it's big enough for 2 people, for trips under a week.
    
    here is  a wooden model made of red cedar under construction
    

    Photobucket

    it's a 100 times smaller than a 12.3 meter or 40 ft version.
    
    the plan is to make the 15 ft boat.
    with 41m^2 surface area, that's 441ft^2,
    at $2 per marine plywood square foot,
    about $900, times 2 for other parts $1800,
    which is affordable.
    
    then we go to some cedar woods
    and make supplies to build a bigger 30 or 40 ft model,
    on which we could sail around the world.
    
    planning on using wind power for electricity,
    and having it at least semi-submersible.
    
    We might sail through the north west passage in the winter as it works on ice as well.
    Insulation being the main deciding factor.
    
    Any recommendations or responses welcome.
    :-)
    
    #9430
    Avatar of J.L.-Frusha
    J.L.-Frusha
    Participant

    Interesting idea. Truly huge trimarans do exist. Some are ferries, others are vacation trips(Cuan Law)… Practical is a matter of design perspective, based on ideas and needs.

    Look into it further. If you want to do it, go for it.

    As for the marine plywood, it may not be as practical as you think. There are plenty of plywood boats, but the durability is what counts. Most ‘plwood’ hulls are fiberglassed-over, to protect and reinforce the structure.

    Later,

    J.L..F.

    If you can’t swim with the big fish, stick to the reef

    #9435
    Avatar of elspru
    elspru
    Participant

    J.L.Frusha wrote:

    Interesting idea. Truly huge trimarans do exist.

    Some are ferries, others are vacation trips(Cuan Law)… Practical is a matter of design perspective, based on ideas and needs.

    this one is actually pretty small.

    the models are tiny.

    and first person usable one planing on being a 15 footer.

    it is wide however, that is new to the “multi-hull” scene.

    also easy to assemble for amateurs, can use all straight beams.

    Look into it further. If you want to do it, go for it.

    Thanks :-) I also support you.

    As for the marine plywood, it may not be as practical as you think.

    There are plenty of plywood boats, but the durability is what counts.

    well the plan is to have something simply to get to a forest,

    to build a larger boat once there, from freely available materials.

    Most ‘plwood’ hulls are fiberglassed-over, to protect and reinforce the structure.

    if the plywood boat is used for multiple seasons,

    and requires the extra reinforcement,

    ferro sheathing will be done.

    Later,

    J.L..F.

    If you can’t swim with the big fish, stick to the reef

    I’m more thinking of it as a bootstrapping.

    Really a person can use any boat to get to a forest,

    perhaps even walk there if need be.

    making the first of plywood as a test of the technology as well as initial transport.

    once a fish grows big enough, can swim with the big fish.

    happy happy love joy :D *hugs*

    - Lowki

    #9456
    Avatar of i_is_j_smith
    i_is_j_smith
    Participant

    The Fibonacci sequence is actually:

    0,1,1,2,3,5,8,13,21,34,55,89…..

    You always start with 0 and 1. Then the next number is the sum of the previous two numbers. So 0 + 1 is 1. 1 + 1 is 2. 1 + 2 is 3. 2 + 3 is 5, etc.

    Sorry, just wanted to point that out. I don’t know if that alters your numbers.

    #9462
    Avatar of elspru
    elspru
    Participant

    i_is_j_smith wrote:

    The Fibonacci sequence is actually:

    0,1,1,2,3,5,8,13,21,34,55,89…..

    You always start with 0 and 1. Then the next number is the sum of the previous two numbers. So 0 + 1 is 1. 1 + 1 is 2. 1 + 2 is 3. 2 + 3 is 5, etc.

    Sorry, just wanted to point that out. I don’t know if that alters your numbers.

    By fibonacci i refer only to the algorithm

    fibonacci x y = x+y : fibonacci y (x+y)

    http://en.wikipedia.org/wiki/Golden_ratio_base

    g^1-g^1 = 1

    g^2+g^2 = 3

    g^3-g^3 = 4

    and so on with fibonacci algorithm, 1 3 4 7 11 18 29 …

    happy happy love joy :D *hugs*

    - Lowki

    #9464
    Avatar of i_is_j_smith
    i_is_j_smith
    Participant

    From that Wikipedia page you referenced:

    Fibonacci coding is a closely related numeration system used for integers. In this system, only digits 0 and 1 are used and the place values of the digits are the Fibonacci numbers.

    30 = 1×21 + 0×13 + 1×8 + 0×5 + 0×3 + 0×2 + 1×1 + 0×1 = 10100010fib

    http://en.wikipedia.org/wiki/Fibonacci_number

    But it’s been a long time since I’ve played with my phi-base. Why does that sound dirty for some reason?

    Ok, sorry about the thread hijack. Back to your regular program…

    #9473
    Avatar of elspru
    elspru
    Participant

    i_is_j_smith wrote:

    From that Wikipedia page you referenced:

    Fibonacci coding is a closely related numeration system used for integers. In this system, only digits 0 and 1 are used and the place values of the digits are the Fibonacci numbers.

    30 = 1×21 + 0×13 + 1×8 + 0×5 + 0×3 + 0×2 + 1×1 + 0×1 = 10100010fib

    http://en.wikipedia.org/wiki/Fibonacci_number

    But it’s been a long time since I’ve played with my phi-base. Why does that sound dirty for some reason?

    Ok, sorry about the thread hijack. Back to your regular program…

    The golden fibonacci sequence hold many of the numbers homo-sapiens frequently consider “lucky” or significant,

    in particular 1, 3, 4, 7, 11

    7 being the most common “lucky” number.

    you might have heard of a chain of retail stores called 7-11.

    3′s a crowd,

    4′s a double date,

    7′s considered optimal group conversation.

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