balrog changed the topic of #homecmos to: Homebrew CMOS and MEMS foundry design | Wiki: https://github.com/homecmos/homecmos-wiki | Repositories: https://github.com/homecmos/ | Logs: http://en.qi-hardware.com/homecmos-logs/
<pie_> Noxz, https://www.forbes.com/sites/startswithabang/2018/09/21/the-physics-of-why-timekeeping-first-failed-in-the-americas/ tl;dr gravity varies by up to +-2% depending on location on earth, changes the period of pendulum
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<Noxz> no images showed up for me, maybe adblocker
<Noxz> a 'tourbillon' is supposed to negate the effects of gravity for pocket watches
<Noxz> wristwatches have no need for them, just a pretty "complication" to look at
<pie_> im somewhat skeptical tourbillons actually do that
<pie_> but you're the watchmaker
<pie_> you should make a CAD simulation :P
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<qu1j0t3> pie_: according to wikipedia, that is what they're for. It immediately reminded me of how temp coefficients can be cancelled out in electronics and stuff like that.
<pie_> qu1j0t3, yea sure, it was more a question of does it actually work
<qu1j0t3> why would you doubt it?
<qu1j0t3> if it didn't, it wouldn't have a page on wikipedia :-)
<qu1j0t3> it wouldn be on the "scientific hoaxes" page
<qu1j0t3> on the other hand, epicycles probably have a page, so never mind
<qu1j0t3> anyhow, the principle is explained there
<qu1j0t3> it also mentions why wristwatches don't need it
<pie_> also obscure things might not show up on the hoaxes page? i mean how many people analyze tourbillons? :P
<pie_> so really my main question is whether the complexity added might negate any tolerance improvements or something
<qu1j0t3> did you read the page?
<qu1j0t3> the idea of playing a force off against itself is everywhere in engineering
<qu1j0t3> it works
<pie_> no i have not read the page yet but i will
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<qu1j0t3> pie_: Tourbillons aren't obscure! I think you may not realise how important timekeeping was for ships and others at the time :) For navigators it's life and death
<Bike> do actual marine chromoneters have tourbillons?
<qu1j0t3> they probably did for a while.
<qu1j0t3> whatever the state of the art was
<Bike> stuff does last a while
<Bike> i think the us navy still teaches star navigation because they think gps might get hacked
<qu1j0t3> yep
<qu1j0t3> and Apollo used it as a very important backup
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<john_cephalopoda> Today spacecraft still use the stars to find out their orientation.
<SpeedEvil> Yes, but not manually, with a sextant, as a backup
<john_cephalopoda> Yeah, they got an automatic star sensor.
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<pie_> lol
<pie_> space pirates novels but with like, sea ships
<pie_> (i know thats a thing)