Scott Dorsey wrote:
Phil Allison wrote:
geoff wrote:
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And the the levitation and rotation is achieve how ?
Not convinced it's for real.
** Many things about it scream scam - but ....
https://www.kickstarter.com/projects.../posts/1898322
Only 12W consumption so it must use permanent magnets.
Yes. It uses permanent magnets whose field falls off with the 4th
power of the distance so the resistance increases dramatically with
deflection. Which is good, at least in terms of the spring side of
the mass-spring system.
The problem with this implementation is that it doesn't have enough
mass, so once you set it moving it bounces back and forth pretty
severely at the system's resonant frequency.
Doesn't anyone build sand tables anymore? --scott
Not if they can help it.
--
Les Cargill