One Sailing Pulley To Rule Them All
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One Sailing Pulley To Rule Them All
When thinking of humanity’s ability to harness wind energy, many people will conjure images of windmills from places like The Netherlands or Persia. But people have been using wind energy for far longer than that in the form of sailing ships. Using the wind for transportation goes back another four thousand years or so, but despite our vast experience navigating the seas with wind alone there is still some room for improvement. Many modern sailboats use a number of different pulleys to manage all of the rigging, but this new, open-source pulley can replace many of them.
The pulley, or “block” as they are sometimes called, is built with a polymer roller made out of a type of nylon, which has the benefit of being extremely durable and self-lubricating but is a bit expensive. Durability and lack of squeakiness is important in sailing applications, though. The body is made from CNC-machined aluminum and is composed of two parts, which pivot around the pulley’s axis to allow various ropes (or “lines”) to be inserted without freeing one end of the rope. In testing, this design outperformed some proprietary stainless steel pulleys of similar size.
Another perk of this design is that it can be set up to work in many different applications on a sailboat, whether that’s for hoisting a mainsail or pulling in a jib or any other task a pulley could be used for. It can also be stacked with others in many different configurations to build custom pulleys of almost any type, and can support up to 14 mm lines. For a sailor this could be extremely valuable, because as it stands each pulley on a ship tends to be used in only certain applications, and might also be proprietary from a specific company. This pulley is being released into the open-source world, allowing anyone to create them who wants one.
Thanks to [Keith] for the tip!
youtube.com/embed/2efa3epOGgY?…
Gli ultimi otto messaggi ricevuti dalla Federazione
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Giuli spende trenta milioni nostri per un Caravaggio....meloni urla anche stavolta?
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I enjoyed and appreciated reading this post.
"I realized almost immediately that GNU/Linux and FreeBSD were so similar they were completely different."
This right here.
My initial impression with #FreeBSD in 2006 was quite similar. Of course, #Linux back then was a much different beast than what it has evolved (mutated?) into today.
Had I not pursued Linux system administration as a career, I *probably* would have stuck with FreeBSD.
We can make all the technical comparisons between the two OSes all day long but what drove my interest and enthusiasm are (1) the documentation and (2) the community.
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@peacelink ma non sono riuscite ad evitare di sbavare mentre lo dicevano
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@stefano Don’t bother filing a bug report. They will act stupid. Probably they are stupid about it. They think it is a bug. Actually the author probably wrote a program he knew was not a solution to the problem but which he could do on deadline and which was good enough for his job at HP.
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@stefano Here is something new for you to be upset about, though, which affects everyone, Linux, BSD, illumos alike. I have been upset about it for over 20 years.
Read ‘man 5 fonts-conf’ or whatever your equivalent is. Read it carefully under ‘FONT MATCHING’. What it says is that a font is not chosen as you wished, but instead RANDOMLY. You are only LUCKY if you get the font you wished.
And if you experiment long enough you will find this is true.
Fontconfig is unfixable and must be scrapped.
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L'Ucraina ha sviluppato nuovi missili balistici FP-7, analoghi all'ATACMS, ma due volte meno costosi
I test si stanno muovendo verso una nuova fase, i missili saranno testati direttamente in attacchi in Russia
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E in omaggio la concessione decennale per l'uso di un pezzo di bosco demaniale.
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@quinta non solo lo fa, ma se ne vanta pure.
