How would a seastead fair in a storm?


Submarines that are forced to ride out storms head into the waves, and porpoise, rather than roll.

(.) #22

The maximum speed, 214 cm s−1, at a direction of almost due west (274°)
was observed on the shelf in 60 m of water at M1 near the surface (6 m).

(6m = approx = 18 feet)

214 cm s-1 = approx = 4.2 knots so that is speed of current generated.
So it is seawater flowing.

Air speed:
maximum winds of 55 – 60 m s−1
60 m s-1, so that is meter per second, not centimeter per second
60 m s-1 = 216 km/hr = approx = 116.76 knots

(.) #23

What do you think of the top speed of a submarine is?
It is probably a top secret.
My guess is 100 miles per hour.

(Bob LLewellyn) #24

They’re quick but not that quick. Naturally speeds are protected information but 35 KPH is reasonable compared to things that aren’t classified.


35 knots is the reported speed at depth of the US Seawolf Class Nuclear subs. I would say they can probably go an additional 10% but not much faster. They also have an estimated crush depth of 3,000 feet, using 2 inch thick HY-100 alloy steel pressure hull.

(.) #26

OK, so I think it is faster than 35 kn.
And even the 35 kn is much faster than the 4 kn current.
So a submarine can go against a current of 4 kns and have a surface
speed of 31 kns. Or something like that, whatever that means.

(.) #27

Sometimes I wonder about the wuderwaffe the US might have.

(Bob LLewellyn) #28

Que es wuderwaffe?..


Secret war machines (123)

(Larry G) #30

Traditionally, Submarines are cylinders. Making a broad aspect submersible is a very different thing.


To method #3, how big is big enough to be impervious to wind and wave?

(Bob LLewellyn) #34

It is a question of inertia which includes a speed vector. A fast moving wave could have a devastating effect while a slow moving large wave could hit with little effect. So we can’t make something that will absolutely stop everything but we can design for everything that is reasonable. The design will also have an effect, Wil’s sphere will handle an on-coming wave better than a straight wall. Also speed has a vector of time. So a floating object that can move somewhat, will increase the time length of contact decreasing the pressure against the object. So we can’t know how big is enough but if we go with the largest wave on record and double the vertical size keeping the length and width proportional, 200ft should suffice.


With more stabilizing techniques, would something smaller work - lets say 50mx50m (169x169ft)? I encountered this measure elsewhere in the forums as well as some reference to a platform patent from 1996.

(Matias Volco) #36

In open seas any surface dwelling structure smaller than one third of a mile requires a bow pointing to the wind and a set up similar to that extensiively described under the shortcut ramform or breakwater city, the triangular design

Past a gigantic size, like Oestershelde or Monaco Breakwater, the shape becomes less important, we can envision clusters of domes, or open sky bowls floating out at sea.
To weather century storms in the actual ocean, as @ForexBob readily disclaimed, an underwater living space of any size should be the best long term bet.


Can you clarify what you mean by 1/3 a mile? Each side or 1/3 square mile? It seems the Oesterschelde is 50m long, so is this your definition of gigantic? Does that mean something 50x50m shouldn’t need to worry too much about big waves?

(Matias Volco) #38

A 50m set up needs to worry a lot about the waves and outside a lake or harbor can only work underwater or with a bow pointing to the wind.

those are the sections of which there are lots, but in a similar way the floating breakwater-city can also be articulated, as described in its ramform picture thread.

Past 500m we have to worry less about the waves and which shape and side faces what.

(Bob LLewellyn) #39

Either should work, a mile is 5280 ft, a square mile is 27,878,400 sq ft.
1/3 of a mile is 1760 ft. = 44.7 meters which we round up to 50 m.
1/3 of a sq mile is 9,292,800 sq ft or (3,048 ft X 3,048 ft.)

Over the years of discussion, we have sort of standardized the suggested base at 50 meters unless otherwise noted. We just don’t tell anyone, so forget that you read this.

(Matias Volco) #40

Prelude almost approaches the size which is “impervious to wind and wave” - but is still small enough to need a Turret Anchor allowing it to point to the waves.

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