EM Drive

Point out news stories, on the net or in mainstream media, related to polywell fusion.

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Skipjack
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Re: EM Drive

Postby Skipjack » Sun May 01, 2016 5:44 pm

Looks like the EM-drive is a bust. Too bad, but was to be expected :(
http://forum.nasaspaceflight.com/index. ... msg1526856

GPecchia
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Re: EM Drive

Postby GPecchia » Sun May 01, 2016 8:30 pm

SeeShells might disagree. For all we know, China had great results and wants to throw us off the path. I'm still awaiting the report from the NASA experiments.
http://forum.nasaspaceflight.com/index. ... msg1526982

Skipjack
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Re: EM Drive

Postby Skipjack » Sun May 01, 2016 8:44 pm


Carl White
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Re: EM Drive

Postby Carl White » Sun May 01, 2016 10:10 pm

Rather pitiful though how triumphant they're all sounding that we're stuck with hugely expensive, explosion-prone rockets as the only way off Earth for the foreseeable future.

Skipjack
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Re: EM Drive

Postby Skipjack » Sun May 01, 2016 10:36 pm


JoeP
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Re: EM Drive

Postby JoeP » Sun May 01, 2016 10:47 pm


ScottL
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Re: EM Drive

Postby ScottL » Mon May 02, 2016 5:14 am


TDPerk
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Re: EM Drive

Postby TDPerk » Mon May 02, 2016 10:18 am

It is past time for Dr. Woodward's work to see rigorous attempts at replication.

I believe the phrase used was, "6 sigma" data.
molon labe
montani semper liberi
para fides paternae patria

williatw
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Re: EM Drive

Postby williatw » Mon May 02, 2016 10:39 am


ladajo
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Re: EM Drive

Postby ladajo » Mon May 02, 2016 12:37 pm

While your argument is sound, I would offer to remember that it is based in 'what we perceive'. The way you express yourself tends to paint you in a somewhat positivist ontology. A more constructivist perspective might provide that while we make sense of what we see, there are things we don't, as these once uncovered, may change how we see things now.
Probably one of the more entertaining explorations in this can be found in the speed of sound explorations and understandings. Especially regarding the what would happen to an object/organism that exceeded it.
Bottom line, we see evidence of what you say, however it should be tempered with the knowledge of unknown unknowns.
The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)
What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

williatw
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Re: EM Drive

Postby williatw » Mon May 02, 2016 10:51 pm


ladajo
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Re: EM Drive

Postby ladajo » Mon May 02, 2016 11:41 pm

No, I meant speed of sound.
There was some interesting thinking going on about what would happen to something that exceeded it before we understood what it really meant.
The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)

What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

ScottL
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Re: EM Drive

Postby ScottL » Tue May 03, 2016 5:35 am

White's theory relies on pushing on or off of virtual particles and virtual particles are a mathematical representation similar to the use of imaginary numbers, so I wouldn't hold my breath on his theory. What you are describing is not White's theory at all, but a thought experiment by Alcubierre which said it's possible if you can produce massive amounts of negative mass. What White did was show that the math could be done in such a way as to reduce that mass amount of negative mass to a "more reasonable amount of negative mass" via geometry. Unfortunately, this is a thought experiment and to-date we have no knowledge on how to generate negative mass, unless that is you buy into Woodward's theory. Only Woodward claims to be able to do this via the oscillation of a dielectric capacitor, but is not really related to White's theory (pushing on virtual particles).

Negative mass isn't disproven per se. We simply have no way within our current realm of knowledge to produce it. There is, to my knowledge, no known reason it couldn't be done. By formulating a theory and providing a mechanism for producing said negative mass would be in the realm of a clever use of fundamental physics with an as mentioned before unknown unknown. It wouldn't shake our understanding at all, but enrich it further.

ladajo
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Re: EM Drive

Postby ladajo » Tue May 03, 2016 12:18 pm

The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)

What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

DeltaV
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Re: EM Drive

Postby DeltaV » Tue May 03, 2016 4:31 pm

Possibly of interest for some of the EMdrive hypotheses being discussed at NSF.

I'd post these there if I had an account, maybe someone both here and on NSF can link.
(May have found one or more of these on NSF, don't recall... apologies if any repeats.)

On Divergence in Radiation Fields


Absorption by Non-Radiating Systems


Stored energies for electric and magnetic current densities


Effective chiral magnetic currents, topological magnetic charges, and microwave vortices in a cavity with an enclosed ferrite disk


On electromagnetic induction


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