tops
tops
(OP)
if i need and alloy that is light and effective to build a spinning top so that the top can rotate for a long time which alloy should i use
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RE: tops
Rod
RE: tops
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: tops
Perhaps you would like to be more specific as to what "light" and "effective" mean. Also you might want to think about cost and size. People on this forum tend to be extremely helpful, but few are successful mind readers.
Patricia Lougheed
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RE: tops
Feathers?
Does a light top really spin longer? I would think that a heavier top would spin longer.
RE: tops
TTFN

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RE: tops
I'd focus on an extremely sharp point, and highest inertia (will allow you to impart more energy with the initial spin) with low mass and reasonable geometry. If it's too large diameter and disc shaped, a strong and even spin (no wobbles) will be hard to achieve.
As negligible as it may be, wind resistance may also be a factor in determining the shape (large thin disc is not ideal) and this will limit the high inertia / low mass concept from becoming too prevalent.
Or you could just cheat and do something with a magnetic base.
RE: tops
However, a more complex multi component/material approach may have performance and even cost advantages.
Of course, given your other post about the top obeying commands I assume it needs a void in it somewhere for the actuators/demons/mexican jumping bean or whatever it is that is going to make it jump.
So, a nice carbon fiber body with a diamond or saphire or similar hard tip and then a 'ring' of tungsten or similar around the OD. If it must be alloy then substitute something nice like magnesium, titanium or (more boringly) aluminum & their alloys.
However given you've given a ridiculously vague requirement any answers we give are likely to have little merit.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: tops
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: tops
Look at gyroscopes and do the research on the mathematics.
Regards,
Cockroach
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Regards,
Mike
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Rockwell, unfortunately, only makes a turbo-encabulator
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RE: tops
Regards,
Cockroach
RE: tops
rmw
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Respectfully, I disagree. For the same reason that bullets are made from lead (or DU, or W) instead of aluminum.
RE: tops
I think I would go with a low friction rounded point. A sharp diamond point would cut. Or maybe a sharp diamond point on a thin layer of UHMW over diamond.
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: tops
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.