Simple Easy to Build, high capacity boat
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This topic contains 6 replies, has 3 voices, and was last updated by elspru 4 years, 11 months ago.

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January 30, 2010 at 8:57 pm #1185
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 multimaran 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.
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 = 120e12*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.
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@jizma:~/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
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 semisubmersible. 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. :)
January 30, 2010 at 9:57 pm #9430
AnonymousInteresting 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 fiberglassedover, to protect and reinforce the structure.
Later,
J.L..F.
If you can’t swim with the big fish, stick to the reef
January 31, 2010 at 8:15 am #9435J.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 “multihull” 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 fiberglassedover, 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 *hugs*
 Lowki
February 1, 2010 at 3:32 pm #9456The 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.
February 1, 2010 at 11:11 pm #9462i_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^1g^1 = 1
g^2+g^2 = 3
g^3g^3 = 4
and so on with fibonacci algorithm, 1 3 4 7 11 18 29 …
happy happy love joy *hugs*
 Lowki
February 2, 2010 at 1:35 am #9464From 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 = 10100010_{fib}
http://en.wikipedia.org/wiki/Fibonacci_number
But it’s been a long time since I’ve played with my phibase. Why does that sound dirty for some reason?
Ok, sorry about the thread hijack. Back to your regular program…
February 3, 2010 at 9:13 am #9473i_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 = 10100010_{fib}
http://en.wikipedia.org/wiki/Fibonacci_number
But it’s been a long time since I’ve played with my phibase. 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 homosapiens 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 711.
3’s a crowd,
4’s a double date,
7’s considered optimal group conversation.

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