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Author Topic: tops in a vacuum  (Read 2875 times)

lincolnrick

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tops in a vacuum
« on: March 26, 2015, 02:43:27 PM »
« Last Edit: March 26, 2015, 04:46:00 PM by ta0 »
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ta0

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Re: tops in a vacuum
« Reply #1 on: March 26, 2015, 04:50:52 PM »
Finally somebody does the experiment!  :)

Now, he selected a top with a lot of air drag. I would like to see the experiment with a smooth top.

I suspect that for the shape of the tops we play, air drag starts to be the limiting factor at around a size of 6" to 10": you don't gain much spin time for going bigger.  On the other hand, a top shaped like a disk can be much larger and spin much longer.

If Joe could put his giant top inside a bell jar . . .
« Last Edit: March 26, 2015, 09:09:30 PM by ta0 »
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Daveid

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Re: tops in a vacuum
« Reply #2 on: March 26, 2015, 08:58:02 PM »
YAAAAAAAAY!
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like I always say:dead monkeys don't fly on sticks.

the Earl of Whirl

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Re: tops in a vacuum
« Reply #3 on: March 26, 2015, 09:11:18 PM »

A LOT longer!!!
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MarkHayward

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Re: tops in a vacuum
« Reply #4 on: March 27, 2015, 05:32:32 PM »
Science!
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Eric

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Re: tops in a vacuum
« Reply #5 on: March 27, 2015, 05:49:30 PM »
A couple of months ago, Mark and I were playing with a Lambda top (aluminum core, brass rim, instrument grade ruby spherical tip) and Mark got a 13+ minute spin........I wonder what it would do in a vacuum!  Based on the ratio in the test, we're talking close to 2 hours!

The Lambda tops were a Kickstarter project early last year, I bought 2, I think some of you may also have bought them.....

https://www.kickstarter.com/projects/darksucks/prometheus-spins-the-lambda-top
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To everything turn, turn, turn..................

the Earl of Whirl

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Re: tops in a vacuum
« Reply #6 on: March 28, 2015, 10:02:56 AM »
A ruby tip!
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jim in paris

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Re: tops in a vacuum
« Reply #7 on: March 28, 2015, 02:37:19 PM »
yeah

don't be surprised this is synthetic ruby, a very affordable material for small pieces
it's used in jewelry,,more info here,
 http://www.madehow.com/Volume-4/Synthetic-Ruby.html

jim
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"oeuvre de coeur prend tout un homme"