Register to reply

What's up with spinning superconductors?

by Gerenuk
Tags: spinning, superconductors
Share this thread:
Gerenuk
#1
Feb26-10, 12:39 PM
P: 1,060
Years ago they showed on TV, that spinning superconductors sort of shield gravitational field.

Now I read
http://news.softpedia.com/news/The-F...ng-20259.shtml

How serious is this to be taken?
Phys.Org News Partner Science news on Phys.org
Wildfires and other burns play bigger role in climate change, professor finds
SR Labs research to expose BadUSB next week in Vegas
New study advances 'DNA revolution,' tells butterflies' evolutionary history
mgb_phys
#2
Feb26-10, 12:51 PM
Sci Advisor
HW Helper
P: 8,954
Not a shield, a spinning mass generates a gravitational field.
AFAIK any mass should work - the superconductor is just experimental convenience.

Legit researchers at a legit institution and there is every reason to suspect that GR isn't quite correct at quantum scales.
Gerenuk
#3
Feb26-10, 01:44 PM
P: 1,060
The claims on TV that I saw were even more fantastic.

They said that a spinning superconductor reduces the gravitational field above them! It was visible with even blowing smoke over the apparatus. Apparently it only worked with superconductors and people had troubles reproducing the results, since it was tough to get a large enough superconductor spin fast enough.
How to think about that?

Doc Al
#4
Feb26-10, 01:50 PM
Mentor
Doc Al's Avatar
P: 41,325
What's up with spinning superconductors?

Quote Quote by Gerenuk View Post
How serious is this to be taken?
I'd say not at all. Podkletnov's 'antigravity' claims have never been duplicated and he's squarely in the "fringe science" camp and thus beyond the scope of PF.
Doc Al
#5
Feb26-10, 02:20 PM
Mentor
Doc Al's Avatar
P: 41,325
Regarding the Tajmar results of 2006 (which is what the OP's link directly referred to), I could not find any published results, only a preprint from 2006. (http://arxiv.org/abs/gr-qc/0603033) If the work was published in the mainstream press, PM me and I'll reopen this thread.


Register to reply

Related Discussions
Difference between Perfect Diamagnetism and Superconductors Classical Physics 5
Superconducting material has a rating for critical field intensity Atomic, Solid State, Comp. Physics 3
Superconductors Advanced Physics Homework 9
Superconductors can allow a current to flow indefinately General Physics 4
Why superconductors repel magnets no matter what polarity General Physics 5