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hrmmm..... is this real?

Posted by: Sigma - Sun Aug 25, 2013 1:56 am
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hrmmm..... is this real? 
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Post Re: hrmmm..... is this real?   Posted on: Thu Apr 28, 2016 6:04 am
Any word?

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Post Re: hrmmm..... is this real?   Posted on: Thu Apr 28, 2016 12:30 pm
Sigma wrote:
Any word?


Its still an ongoing saga

Last Saturday TMRO an interesting and fun weekly space webcast had a section on it with the #Tag #ImpossibleDrive on those areas of the net they frequent.

https://www.youtube.com/watch?v=r8dDyip-wag

It seems that some of the NASA lab tested bits are beginning to enter peer review but there is still quite a lot that is not. Those who claim results still are only claiming a vary small amount of thrust which might be within the margins of error on testing, So if you are on the conservative side it probably does not exist. But if you are open minded (some may say to open minded :wink: :twisted: ) quite often the interesting stuff happens at the edges it might be a small real effect that indicates an new area worthy of pursuit.

Mike McCulloch is one of those who thinks the interesting stuff is at the edge

http://physicsfromtheedge.blogspot.co.u ... mihsc.html

but also willing to put papers out for peer review

http://arxiv.org/abs/1604.03449

My take is that we do know current theories that work well under most "normal" conditions (gravity&quantum) do break down at the extremes so there may be room for some interesting stuff to happen at the edges and well designed technology may able to exploit those edges.

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Post Re: hrmmm..... is this real?   Posted on: Fri Sep 09, 2016 9:01 pm
http://www.popularmechanics.com/science ... ctionless/

Quote:
The EmDrive, a hypothetical miracle propulsion system for outer space, has been sparking heated arguments for years. Now, Guido Fetta plans to settle the argument about reactionless space drives for once and for all by sending one into space to prove that it really generates thrust without exhaust.

Even if mainstream scientists say this is impossible.

Fetta is CEO of Cannae Inc, and inventor of the Cannae Drive. His creation is related to the EmDrive first demonstrated by British engineer Roger Shawyer in 2003. Both are closed systems filled with microwaves with no exhaust, yet which the inventors claim do produce thrust. There is no accepted theory of how this might work. Shawyer claims that relativistic effects produce different radiation pressures at the two ends of the drive, leading to a net force. Fetta pursues a similar idea involving Lorentz (electromagnetic) forces. NASA researchers have suggested that the drive is actually pushing against "quantum vacuum virtual plasma" of particles that shift in and out of existence.

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Post Re: hrmmm..... is this real?   Posted on: Mon Oct 17, 2016 7:36 pm
If you want to read the patent on the device article with a link to it here:-

http://www.collective-evolution.com/201 ... de-public/

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Post Re: hrmmm..... is this real?   Posted on: Tue Nov 08, 2016 4:30 pm
Interesting rumours about the EMDrive being tested in space by both US & China

http://www.nextbigfuture.com/2016/11/co ... ve-is.html

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Post Re: hrmmm..... is this real?   Posted on: Wed Nov 16, 2016 2:11 pm
Not rumors, just click-bait fabrication/speculation. They don't even use an accurate drawing of the X-37...

EM Drive isn't anywhere near the readiness level for a flight experiment, and there isn't even a rational reason to put it in orbit because none of its supposed operating principles require it to function. You would need to throw it way out to an L point to get a spot where Earth's magnetic influence was low enough to make sure that is not what is being measured here.


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Post Re: hrmmm..... is this real?   Posted on: Sun Nov 20, 2016 10:51 pm
There does seem to be a lot of hype about it again. Strangely I accidentally came across the 2006 New Scientist article on it today & reading that it was all meant to be based on innovative use of Maxwell's equations and Einstein's relativity no mention of warp drives virtual particles etc but it did mention that it should if the theory was correct scale up from millinewtons which has been stated several times before could be experimental error to something useful down here on Earth if they could build a superconducting resonate cavity version. But as they said in 2006 they hoped this would only take a couple of years to do I am not holding my breath even though superconductor theory & practice has been improving lately IIRC.

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Post Re: hrmmm..... is this real?   Posted on: Mon Nov 21, 2016 2:32 pm
Or if the effect works at higher energy frequencies.

Anyway, the NASA paper on EM drive has been published. Still no new insite other than the usual "quantum space monkeys" speculation.

“Measurement of Impulsive Thrust from a Closed Radio-Frequency Cavity in Vacuum“

http://dx.doi.org/10.2514/1.B36120


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Post Re: hrmmm..... is this real?   Posted on: Wed Dec 21, 2016 1:11 pm
It could be more clickbait but at least nextbigfuture often link to their sources and is seems China is testing EMDrive in space

http://www.nextbigfuture.com/2016/12/ch ... tless.html

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