em drive

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

Moderators: tonybarry, MSimon

ohiovr
Posts: 409
Joined: Mon Mar 02, 2009 6:36 pm
Contact:

em drive

Postby ohiovr » Fri Jul 04, 2014 5:05 am

this is interesting if you haven't seen it, its another propellantless thruster

http://emdrive.com/

Apparently it is passing peer review in china where they were able to make a 720 millinewtons of thrust from about 2.5 kw of microwave energy in a high q resonator. I kind of doubt there would be any academic fraud (it is possible though) because I presume it is off with your head if you are lying there. There are other fantastic things it can do if you dig around on the site.

So which is it, crazy fantasy, or peer reviewed fact?

tokamac
Posts: 55
Joined: Wed Nov 04, 2009 2:50 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby tokamac » Fri Jul 04, 2014 8:43 am

Using search with "EM Drive" shows a thread already exists: viewtopic.php?t=2949
There's nothing new about it since the last posts almost a year and a half ago.

Tom Ligon
Posts: 1871
Joined: Wed Aug 22, 2007 1:23 am
Location: Northern Virginia
Contact:

Re: em drive

Postby Tom Ligon » Fri Jul 04, 2014 2:23 pm

A physicist friend of mine would say "I've been warning people that the Chinese were working on this."

Supposedly this is all Kosher under Maxwell's laws, but involves phase shifts and/or applications of the right hand rule to orientations not generally seen in textbooks. He pointed me to a well-respected physics textbook that has a paragraph or two on this. Essentially, the cases that produce these effects produce results which most educators are reluctant to get into because they buck conventional teaching.

GIThruster
Posts: 4686
Joined: Tue May 25, 2010 8:17 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby GIThruster » Sat Jul 05, 2014 1:55 pm

Shawyer's EM Drive involves a violation of conservation. Sonny and Paul did a replication of it down at Eagle since Sonny's QVF model predicts it should generate thrust, but everyone with a clue has known this is a fraud since the time it was being funded by the British government back about 2004.

It's based upon a misunderstanding of what "group velocity" entails. No good physicists think this can work.
"Courage is not just a virtue, but the form of every virtue at the testing point." C. S. Lewis

ohiovr
Posts: 409
Joined: Mon Mar 02, 2009 6:36 pm
Contact:

Re: em drive

Postby ohiovr » Sat Aug 02, 2014 12:18 am


ScottL
Posts: 1122
Joined: Thu Jun 02, 2011 11:26 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby ScottL » Sat Aug 02, 2014 12:25 am

Skeptical analysis of what's going on:


rcain
Posts: 992
Joined: Mon Apr 14, 2008 2:43 pm
Contact:

Re: em drive

Postby rcain » Sat Aug 02, 2014 1:17 am

thanks for that last link. i thought for a moment there had been some real scientific revalation. but same old, by the look of it. SLACKNESS. shame.

djolds1
Posts: 1296
Joined: Fri Jul 13, 2007 8:03 am
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby djolds1 » Sat Aug 02, 2014 1:30 am

Vae Victis

birchoff
Posts: 200
Joined: Sun Jul 27, 2014 7:11 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby birchoff » Sat Aug 02, 2014 3:18 am


rcain
Posts: 992
Joined: Mon Apr 14, 2008 2:43 pm
Contact:

Re: em drive

Postby rcain » Sat Aug 02, 2014 4:22 am


Betruger
Posts: 2310
Joined: Tue May 06, 2008 11:54 am
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby Betruger » Sat Aug 02, 2014 4:50 am

Is it wrong to suspect this is yet another instance of White pushing for hype way too early? Who exactly would gain from this?

birchoff
Posts: 200
Joined: Sun Jul 27, 2014 7:11 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby birchoff » Sat Aug 02, 2014 4:58 am


Betruger
Posts: 2310
Joined: Tue May 06, 2008 11:54 am
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby Betruger » Sat Aug 02, 2014 5:02 am

Birchoff your links to the papers in the other thread are broken.

birchoff
Posts: 200
Joined: Sun Jul 27, 2014 7:11 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby birchoff » Sat Aug 02, 2014 5:06 am


birchoff
Posts: 200
Joined: Sun Jul 27, 2014 7:11 pm
[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Re: em drive

Postby birchoff » Sat Aug 02, 2014 5:11 am



[phpBB Debug] PHP Warning: in file [ROOT]/vendor/twig/twig/lib/Twig/Extension/Core.php on line 1236: count(): Parameter must be an array or an object that implements Countable

Return to “News”

Who is online

Users browsing this forum: No registered users and 4 guests