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How to design a sailing ship for the 21st century?

solar.lowtechmagazine.com

11–20 of 90 posts

Re: How to design a sailing ship for the 21st century?

#11
There are types of sails or wind power that have been investigated to reduce carbon output / efficiency of tankers but they never seem to have been deployed at scale in any sense. Basically a kite-surfing tanker.

It seems like until we get tiny compact fusion energy we'll always end up running off the cheapest oil products, as they make the most sense economically. Without any actual incentive to switch, not a single shipping company will.

Re: How to design a sailing ship for the 21st century?

#12

Finally, a proper look at the cost in most respects of the real cost of a 'sustainable' technology. We need more of these but no one will pay nor pay attention. Unfortunately though, sail driven ships are kind of useless for the efficient movement of cargo. Masts are required and take away stowage space and, more importantly, make efficient cargo loading/unloading impossible. Read the book "The Box" to understand the…

Instead of sails we could try other methods, like kites, or that weird turning-metal column effect. To name two serious proposals I've seen

I assume you’re referring to the Coanda effect.

Re: How to design a sailing ship for the 21st century?

#13
post #4

https://www.youtube.com/watch?v=yP1f3Df6SXE Maybe this kind of lifestyle appeals to enthusiasts, but I can't see modern unions allowing some of the dangerous work out on the sails.

Thanks for sharing this interview. I've seen about 10 minutes so far and I'm hooked. I just love learning about lives that are/were so different to mine.

Re: How to design a sailing ship for the 21st century?

#14

Finally, a proper look at the cost in most respects of the real cost of a 'sustainable' technology. We need more of these but no one will pay nor pay attention. Unfortunately though, sail driven ships are kind of useless for the efficient movement of cargo. Masts are required and take away stowage space and, more importantly, make efficient cargo loading/unloading impossible. Read the book "The Box" to understand the…

Instead of sails we could try other methods, like kites, or that weird turning-metal column effect. To name two serious proposals I've seen

Good news on the “weird turning-metal column effect” front: they just installed five tilting rotor sails on a newlybuilt bulk ore carrier.

https://gcaptain.com/newbuild-vale-vloc-revealed-as-bulk-car...

Why is this important? It shows that the ship owners has seen enough promise in the technology to overcome the potential risks. If it works out well for them we will very likely see wider adoption.

Re: How to design a sailing ship for the 21st century?

#15
post #9
post #4

https://www.youtube.com/watch?v=yP1f3Df6SXE Maybe this kind of lifestyle appeals to enthusiasts, but I can't see modern unions allowing some of the dangerous work out on the sails.

I see no reason why most of the sail work couldn't be automated and motorized.

Rigid wingsails make more sense than tall ships, unless you are looking for nostalgia.

Re: How to design a sailing ship for the 21st century?

#17
> However, by definition, the sailing ship is not a carbon neutral technology. For most of history, sailing ships were built from wood, but back then whole forests were felled for ships, and those trees often did not grow back.

I do not understand this sentence. If I cut down a tree and do not burn it, isn't it a carbon neutral process? It did not release any carbon into atmosphere. By this logic is there any material to use to build something which is neutral?

Re: How to design a sailing ship for the 21st century?

#18
post #8
post #6

Earlier quoted context omitted.

Tanker boats could probably use sails without loading and unloading getting in the way. I would imagine it's just hoses and pumps to get the liquid out.

Exactly, and these are precisely the vessels that can most handle slower transfer speeds - as you just have more sailboats to make up for slower speeds/smaller sizes. All that matters is how many arrive each day, as the cargo is fungible. In fact, doing such would provide a buffer that could help prevent supply shocks.

At what point does the additional resource of building a lot more ships (which have more crew, eating more food, producing more waste) result in a net negative?

Oceangoing ships have a relatively short useful life...salt water is rough on metal.

Re: How to design a sailing ship for the 21st century?

#19
post #17

> However, by definition, the sailing ship is not a carbon neutral technology. For most of history, sailing ships were built from wood, but back then whole forests were felled for ships, and those trees often did not grow back. I do not understand this sentence. If I cut down a tree and do not burn it, isn't it a carbon neutral process? It did not release any carbon into atmosphere. By this logic is there any materia…

The tree is no longer alive to photosynthesize co2.
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