From: Martin Shough <parcellular.nul> Date: Mon, 27 Jun 2011 12:59:06 +0100 Archived: Mon, 27 Jun 2011 09:18:32 -0400 Subject: Re: "Revolutionary" Wingless Aircraft >From: William Treurniet <wtreurniet.nul> >To: post.nul >Date: Sun, 26 Jun 2011 09:47:51 -0400 >Subject: Re: "Revolutionary" Wingless Aircraft >>From: Martin Shough<parcellular.nul> >>To:<post.nul> >>Date: Sun, 26 Jun 2011 10:23:04 +0100 >>Subject: Re: "Revolutionary" Wingless Aircraft >>>>http://tinyurl.com/6afchjz >>>>Austrian Company Debuts Revolutionary Wingless Aircraft >>><snip> >>I agree. The first article made my scam antennae twitch with >>those "frictionless bearings". Yeah, right - nanokelvin >>superfluid lubrication or whatever that can be "repaired by a >>local car mechanic"? I think not! >Apparently, a magnetic field can be used to create a >frictionless >bearing. You are right. There are frictionless bearings in the sense that the rotating surfaces are not in contact and thus have zero frictional wear. I suppose that is good enough for the claim made, actually. My scam alarm went off because I was thinking in terms of fundamental physics, where such a bearing should more properly be described as "near frictionless". A bearing that continues to rotate freely forever with zero losses is a perpetual motion machine, and people who don't believe in thermodaynamics have been trying to make PMMs out of magnets since Pontius was a pilate, without success. I'm sure there are always losses (in any classical system , anyway) for example due to eddy currents, etc. Which is why I said >This article somewhat redeems the claim in the form of "near- >frictionless bearings" I accept that my response was inappropriate. From an engineering point of view the bearings can be as good as frictionless. Martin Shough Listen to 'Strange Days... Indeed' - The PodCast At: http://www.virtuallystrange.net/ufo/sdi/program/ These contents above are copyright of the author and UFO UpDates - Toronto. They may not be reproduced without the express permission of both parties and are intended for educational use only.
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