EM Drive

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

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ScottL
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Re: EM Drive

Postby ScottL » Wed Dec 28, 2016 7:07 am


D Tibbets
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Re: EM Drive

Postby D Tibbets » Fri Dec 30, 2016 7:07 pm

In this long thread, this may have been linked before, but I found this to be informative and gives a useful perspective as to it's potential usefulness.

https://www.youtube.com/watch?v=JGcvxg7jJTs

Dan Tibbets
To error is human... and I'm very human.

Diogenes
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Re: EM Drive

Postby Diogenes » Thu Aug 10, 2017 9:43 pm

‘What all the wise men promised has not happened, and what all the damned fools said would happen has come to pass.’
— Lord Melbourne —

ScottL
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Re: EM Drive

Postby ScottL » Thu Aug 10, 2017 10:24 pm

Yeah, this whole topic is done at this point.

Shawyer makes claim for 20+ years.
Prof. Yang publishes results of a poorly done experiment seemingly confirming above claims.
EagleWorks joins the effort. First attempt, null result.
Media sensationalizes as media does.
"Believers" in the EmDrive start to appear without any physics (or science in general) background trying to be armchair scientists.
DIYers come out of the woodwork trying to use magnetrons to experiment.
Forum poster on NSF and reddit starts to make extraordinary claims, fails to produce evidence of said claims, disappears for a few months.
EagleWorks sets up Vacuum test, non-vacuum rated equipment fails, results still make it up on the web. Experiment still has serious design issues.
Some fail and realize why, others fail and refuse to accept why.
Prof. Tajmar tries his hand at an EmDrive only to decide his setup is insufficient and results would ultimately be inconclusive.
Prof. Yang alters experiment to move power source onto device instead of feeding it along the balance arm, measurement disappears. Publishes new results, believers won't accept results.
EagleWorks fails to publish to any physics journals, decides to target engineering journals and successfully publishes in a propulsion journal.
EagleWorks results are pretty heavily critique'd in the physics community as well as the amateur physics communities for issues with design.
Skeptics chalk the claims up to noise in the way of thermal effects, lorentz forces, poor grounding, and other issues.
Forum poster on NSF and reddit reappears with even greater claims. Starts spreading false rumors about EmDrive testing on the X37-B and in China.
Most folks have moved on, but there are still hold-outs.
Shawyer doubles down on claims....


Rossi is still better at this game than Shawyer will ever be.

RERT
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Re: EM Drive

Postby RERT » Fri Aug 11, 2017 7:59 am

Except that Shawyer has (probably) sunk his own money into his company, along with that of other people willing to give him indefinite term, interest free loans - close friends. He has been paying back for a couple of years, as disclosed in related party transactions. Read the last 10 years accounts, they are public documents,

Also, I object to what you say about B37b testing. I made that conjecture up myself, here at Polywell, many months ago...

(The link was wrong above for a minute until I fixed it)

ScottL
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Re: EM Drive

Postby ScottL » Fri Aug 11, 2017 6:53 pm


ladajo
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Re: EM Drive

Postby ladajo » Fri Aug 11, 2017 8:17 pm

The only X-37B drive testing that has been made public is potentially Ion Thruster work, as far as I know. Something probably along the lines of VASIMR. I recall seeing an article on it somewhere. No time to hunt it down right now.
I do recall someone running around saying that the AF and DARPA was testing EM on orbit at some point, and thinking they were full of it. It was not TRL mature enough, and remains so as far as I know. While on orbit is a great test regime, you need to be ready to do it, and I don't think we are there yet.
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 » Fri Aug 11, 2017 8:55 pm


RERT
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Re: EM Drive

Postby RERT » Fri Aug 11, 2017 9:25 pm

I agree Shawyers theory appears to be rubbish.

My opinion on the accounts is that Shawyer has spent many years and many hundreds of thousands of pounds testing his concept. He should know if it works or not. He is either right, criminal, or delusional.

The remark about the B37b was meant to be mildly humorous. I did make a post many months ago that effect. It was based on the reports that BEFORE ion thruster work, the B37b flew missions which lasted for multiples of the scheduled duration. (Sounds like a propellant less thruster to me...) These were said to be testing advanced propulsion, and the timing was roughly when Shawyer claims that the Boeing relationship closed off. A supporter would conclude that a flight test had been successful, and the program had 'gone dark'.

It was humorous because I didn't really get upset that you had failed to note my priority on the rumour...

(Revision: i just looked it up - my post was on this thread 24 Aug 2016)

ScottL
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Re: EM Drive

Postby ScottL » Mon Aug 14, 2017 6:35 am


Carl White
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Re: EM Drive

Postby Carl White » Thu Oct 19, 2017 10:56 pm


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Re: EM Drive

Postby williatw » Thu Oct 19, 2017 11:47 pm


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Re: EM Drive

Postby Carl White » Sun Oct 22, 2017 4:47 am


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Re: EM Drive

Postby Maui » Fri May 18, 2018 5:25 pm

A new attempt to validate/disprove EMDrive and Mach Effect has been attempted. Initial results published here:
https://www.researchgate.net/publicatio ... _Thrusters

In a nutshell: Previous promising EMDrive results are attributed to insufficient shielding on cables. Mach Effect results were a little more indeterminate, but also appears likely to be attributed to unintended electromagnetic or thermal interactions. (More tests to come)

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Re: EM Drive

Postby TDPerk » Fri May 18, 2018 5:53 pm

RE by Maui » Fri May 18, 2018 10:25 pm

And because the work of Woodward, Fearn, and other work by Tajmar, et al, have no such thermal or magnetic interactions, this work even if replicable cannot impugn those results.
molon labe
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