A long but interesting article on how he’s attempting to transform society in an actual useful direction.
One thought on “Peter Thiel”
Comments are closed.
A long but interesting article on how he’s attempting to transform society in an actual useful direction.
Comments are closed.
What kind anchors would you use for floating oceanic city?
I briefly looked at what kind anchors are used:
Deadweight Permanent Anchors
Pile anchors
Propellent anchors
And decided the anchor would at the surface which attached to something like Deadweight, pile, and/or propellent Anchors at ocean floor directly below it.
The anchor at the surface would like a spar buoy- or as call it a pipelauncher, and it would be 1/2 way to pulling, let’s call it the pile anchor, off the bottom.
Both a spar buoy and pipelauncher are fairly narrow as compared to their length, and this anchor at surface would narrower.
And this probably work better in deeper water. But say water is only 200 meter deep. And make spar buoy surface anchor, 1 meter in diameter and 100 meter long pipe with top end capped.
Pipe wall thickness 1/4″ or 0.00635 meters and non corrosive steel with density of about 8000 kg per cubic meter.
1 meter pipe has circumference of 3.14 meter. By 100 meter is
314.16 square meter. Times by 0.00635 = 1.9949 cubic meter of material. Times 8000 kg = 15,959.27 kg
Displacement: .5 x .5 x Pi = .7853975 cubic meter per 1 meter length. 100 meter length: 78.53975 cubic meter of water.
If say 1/4 length {25 meters] was filled with air, it has bouyancy force of 78.53975 / 4 which is 19.635 tons.
So anchor at sea floor would need say 40 ton of upward force to lift off the sea floor.
Now, how immovable is buoy at the surface?
Obviously +20 tons of force lifts weight off bottom. Or talk about material stretching. In terms of inertia you mass of metal and mass of water inside pipe.
What do big tug boats pull?
“the Guinness World Record for the world’s most powerful tugboat is held by Farstad Shipping’s Far Samson, which achieved an astounding 423 tonne bollard pull during testing”
Wiki: “Bollard pull is a conventional measure of the pulling (or towing) power of a watercraft. It is defined as the force (in tons or kilonewtons (kN)) exerted by a vessel under full power,”
so that could easily pull the anchor off sea floor.
What if it needed 500 tons to pull it off the sea floor?
Of course have look strength of pipe and cables strength between anchor and pipe, pipe is 1.9949 cubic meter over 100 meter or
121736.2671 cubic inches is 1.9949 cubic meter. Make meter rather 100 meter: .019949 is 1217.3627. And meter = 39.3701
is 30 square inches or rod 5″ by 6″. And cable of equal amount steel.
So seem possible that tug could stretch or break it. But if tug on it, what happens before it possibly stretches or breaks something.
So say have this ALP Striker which is 1/4 mile away with floating tow line attached to top spar buoy and start towing it.
Would start by submerging the spar buoy, maybe it would bend the spar buoy.
I wasn’t planning on a “423 tonne bollard pull” though maybe a floating city would need to resist such force, but nor I thinking just having one of these things. It should not be hard to move, but doesn’t have to sink. If sink, I could add something to design to make float more. Put spar thru middle of some barge, tow barge. No, scratch that, have it still attached to buoy and put tow line across the barge, does sink barge?**
Does not seem it would. So does that leave it with option of bending the spar, and if spar bends and because it bends, does it then sink the barge.
Probably some math I am not getting.
** Maybe it just *mostly* moves the barge. How far does barge move, and wouldn’t it likely eventually depress the barge under water?