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 5 years, 1 month ago.

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• #1185

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.

```

```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.

```

```It's also designed for cold or hot weather,
including skiing on ice,
operable from inside.

here are some dimensions (in meters)
for a 15 foot model I'm planning on making

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 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

Anonymous

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

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 *hugs*

- Lowki

#9456

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

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 *hugs*

- Lowki

#9464

i_is_j_smith
Participant

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?

#9473

elspru
Participant

i_is_j_smith wrote:

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?

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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