independent buoyancy module

Syndicate replies to “independent buoyancy module” topic Tue, 06/10/2008 - 05:54 — Heath

http://wiki.seasteading.org/index.php/Image:Independent_buoyancy.jpg

Such a thing would give you the absolute minimum connection to the waves.

When a huge wave comes along, most of the wave will completely miss.

As long as the legs have near neutral buoyancy, you don't have to worry about it losing stability from large waves going above and below the buoyancy module

Scale is all whack in the picture

Example: A twenty foot diameter sphere provides a whopping 2,000,000 pounds of buoyancy

4pi/3*20^3 * (60 pounds/sq ft buoyancy) = 2011200

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Tue, 06/10/2008 - 15:00 — Eelco

Is that sphere supposed to

Is that sphere supposed to rest on the water interface? Flotation on the water interface wil always interact strongly wiht the waves, a wave being a movement of the water interface.

Tue, 06/10/2008 - 16:17 — Sundiver

SWA

A smaller waterplane area is the objective with all designs. Whether a single spar or multiple legs the idea is keep the cross sectional area[s] at the waterline as small as practical to minimize the effect of the interface on the stead.

Tue, 06/10/2008 - 16:56 — vincecate

SWA is objective of almost all designs

The only one that is not after small waterplane area is mine:

    http://wiki.seasteading.org/index.php/User:Vincecate/Tension_circle_hous...

Here the idea is to be so much wider than any normal boat a family could afford that it is stable enough to be on the deep ocean. 

 

Tue, 06/10/2008 - 17:31 — Joep

Similar idea

Here http://wiki.seasteading.org/index.php/User:Joep/PillarStead

Thu, 06/12/2008 - 14:36 — Sundiver

Pillarstead

The pillarstead does not have enough reserve buoyancy in the legs at/above the waterline. It would tend to roll (and/or pitch). Maybe that could be countered with passive anti-roll tanks, or Frahm tanks. But it would need an active ballast system because everytime the wind changed it would affect the heel angle. Also everytime a crowd ran to one side to look at something.  

Thu, 06/12/2008 - 14:45 — Jesrad

Simple maths

Connectivity to waves is very simple: it has all to do with the density difference between water and the volume of material inside wave influence. The closer those densities are, the lower the reaction to wave (it becomes zero when they are identical). This, of course, does not take dynamic effects into account like drag.