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Old 10-24-2014, 01:00 AM
Location: Tennessee/Michigan
28,006 posts, read 46,480,447 times
Reputation: 19433


Ever since Marty McFly took to the air in the 1989 classic "Back to the Future II," humanity has been eagerly awaiting the arrival of a real, fully-functional hoverboard. Since then, tinkerers and scientists the world over have launched countless attempts at building such a device, and now, after more than 25 years of trying, technology has finally caught up with our far-fetched dreams.

Marty McFly
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Old 10-24-2014, 01:37 AM
7,212 posts, read 5,297,129 times
Reputation: 7863
So, some guy has found out about magnets and has managed to delude himself into thinking he's discovered something new and revolutionary… And now he's hoping other people are similarly amazed by his "discovery" and will give him lots of cash.
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Old 10-24-2014, 04:19 AM
5,881 posts, read 6,312,155 times
Why so negative ? It seems kinda cool And notice how it's the "journalists" that claim this is such a breakthrough
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Old 10-24-2014, 11:14 AM
Location: Pueblo - Colorado's Second City
12,105 posts, read 20,410,542 times
Reputation: 4143
You know I am all about advancing technology but I have to be negative on this one as well. Unless we plan on putting copper on all the roads we are still decades away from flying cars and skateboards like in Back to the Future.
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Old 10-24-2014, 12:12 PM
Location: Somewhere in northern Alabama
16,929 posts, read 51,568,471 times
Reputation: 27916
Interesting application of Lenz. Investigating a little further, it apparently is extremely loud which indicates portions of it must vibrate (hysteresis?) at a fairly high frequency for it to work or in the process of working. As the noise appears to increase with loading that seems inherent in the design. I was impressed with the distance (height) achieved and lack of outside power source more than anything. Magnetic fields follow the inverse square law on distance and that is a stout levitation that can require a fair amount of power.

The copper plate underneath would have eddy currents and some heating. That means any workable surface would have to be more than a foil for any weight at all without distortion or tearing, and there is some inherent friction. Copper is ideal but expensive, I want to think aluminum, but I forget if it has ferro properties that might interfere.

I'm not sure how useful the idea is.
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