h a l f b a k e r y"My only concern is that it wouldn't work, which I see as a problem."
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I propose Large Scale Catamarans, based on a well-
functioning 3 meter length prototype, which proved to be
the lightest (35 kilogrammes), and the cheapest (700
$$$'s), one person catamaran, yet.
The scale would be :
Length : Width : Diameter of hulls : Weight :
Payload :
3,00
m 1,85 m 0,250 m 35 kg 120
kg
12 m 7 m 1,000 m 2240 kg 7680
kg
120 m 65 m 10,0 m 2240 ton 7680
ton
1200 m 680 m 100,0 m 2,24 Mt 7,68
Mt
12 km's 8 km's 1,0 km's 2,24 Gt 7,68
Gt
A 12 by 8 kilometers catamaran would serve as a new
community, like an island state, (Monte Carlo, Hawaii,
Cuba), holding appartments in the hulls, and say 4
squares
of entertainment stadiums in the 6 by 6 kilometer
platform.
The entire top surface would be covered by transparent
photo voltaic cells, yielding the current and voltage for
the
consumbtion aboard.
Project Habakkuk
http://en.wikipedia...ki/Project_Habakkuk
Similar [8th of 7, May 28 2011]
other types of YACHT/ISLAND combo's,...,.
http://youtu.be/d98u3jr47Fc
comparing to a James Bond film's villan's lair,..,.,..,. [sirau, Jun 18 2012]
Project Blueseed -
http://www.huffingt...-ent_n_1153300.html
The latest island being built [MisterQED, Jun 18 2012]
[link]
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// like an island state, (Monte Carlo//
Interesting take on geography. |
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How do things scale? What about waves? How big
would hydrodynamic and wind forces be? Would it
run agound? And everything else? |
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- 'Killer' waves are said to be 100 meters from top
to bottom, (and travelling at 100 kms/hour !!). |
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The immersion would be circa 300 meters, 100
meters splash and up and down zone, 200 meters
free air under platform, 400 meters height of
platform volume. |
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A re-think of Stadiums : a central, main stadium,
of 3 by 3 kilometers, surrounded by a rim of 1 by 1
individual smaller stadiums. |
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Hulls could be made concrete shell elements, 25 by 25
meters, 1 meter thick, with some internal shapes for
ribs. |
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For upper elements : also 25 x25, but hardened glass
centres. |
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The Catamaran would stay in the open oceans, and
serve as a station for regular cruise ships. |
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Many diverse events would be staged, every day
changing in each stadium. |
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Even motorsport racing events could be held, in
the central arena : Formula One/NASCAR/Indy-
racing, Monster Trucks, Moto-Cross. |
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In the smaller venues : Anastacia, Theatre, Opera,
etc. |
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you can't just make something the same aspect ratio
but much larger and expect it to have the same
strength. In this house we obey the laws of physics! |
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So this is like an oil-drilling platform minus the actual oil drilling ? |
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I think oil drilling platforms are usually less than 12x8km in size, and stand on legs resting on the sea floor rather than being free floating. Apart from that, yes, almost identical. |
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I didn't pretend to have made any strength calculus,
just a quick pre-view of just one solution. |
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Certainly interesting reading, the Habakkuk stories.
Thanks for sharing. |
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//stand on legs resting on the sea floor// Nope, not
always. Unlike a man's legs, in Abraham Lincoln's
famous phrase, the legs of an oil platform
don't always reach the ground. |
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if you are going to work on this scale try one of Buckminster Fullers cloud nines. and float through the air |
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Thanks [MP], I'll just pretend that //usually// refers to all the clauses following, not just the first. |
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- joined The Buckminster Fuller Institute on
Facebook. Thanks for the reference. |
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Unfortunately there's a law in Engineering known as the 'square cube law' - this is why an ant can lift many times it's own weight (despite being thin and spindly), but an elephant (despite being chunky) will break most of it's bones if it falls much more than it's own height. |
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The best way to explain it is if you imagine building a tower - the weight pressing down is proportional to the volume (double the size and you 2 x 2 x 2 = 8x the mass) while the area it's pressing down on only 2 x 2 = 4x, so the stress, of force per unit area doubles! The natural frequencies (speed things vibrate at) also reduce as you scale things, which also causes issues. |
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The concept of a large, floating space capable of supporting a community sounds cool, but you can't just scale things - physics gets in the way! Different construction method required, but a nice idea. |
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the scale is purely meant as a 'spectrum' of outside
dimensions. |
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the weights are scaled in the third power, ie a
factor of 10 in lengths, gives a factor of 1000 in
volume/weight. |
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The prototype was 2 mm's thick PVC ventilation
pipe, which was filled with PUR foam (30 grammes
per liter). |
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The larger constructions can be more intricate,
detailed and refined. |
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(If the Eiffel tower of Paris, France, was scaled to
height of 28 cm's, it would weigh only 30
grammes,..). |
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Anyway, a scaled submersed pipe, follows the
same proportional pressure/stress profiles
(possibly with an adjustment for 300 meters
submersed depth, pressure 3000 atm (!)). |
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A 2 mm pipe thickness of a 3 meter cat, scales
directly to 0,002 x 4 x 10 x 10 x 10 := 8 meters wall
thickness PVC of a largest cat. |
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And PVC isn't so strong as concrete, therefore : 1
meter. |
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Just a jab at a dimension, no real calculus. |
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I guess this would be a good solution for Project
Blueseed. (link) |
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