Generic EM Drive Information - Revision history

Saucyjack: Added link to new MEEP page.

2015-07-13T13:34:17Z

Added link to new MEEP page.

← Older revision		Revision as of 06:34, 13 July 2015
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	This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.		This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.

			== Simulating With MEEP ==
			[[MEEP]] is is a free finite-difference time-domain (FDTD) simulation software package developed at MIT to model electromagnetic systems<ref>[http://ab-initio.mit.edu/wiki/index.php/Meep]</ref>. A number of people, including @aero, have been using it to simulate the evolution of the fields within the EM Drive.

	== Conservation of Energy and Momentum ==		== Conservation of Energy and Momentum ==

127.0.0.1 at 23:29, 4 June 2015

2015-06-04T23:29:17Z

← Older revision		Revision as of 16:29, 4 June 2015
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	An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>		An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>

	The mode~~-shape to frequency relation is~~ sensitive to the [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>		The natural frequencies (and therefore the mode shapes) of a cavity are sensitive to the [[Experimental Results\|dimensions of the cavity]]. <ref>[https://en.wikipedia.org/wiki/Microwave_cavity#Cylindrical_cavity][http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>
	Here is a plot of what a few mode shapes '''in a cylindrical cavity''' look like when viewed perpendicular to the circular cross section plane.		Here is a plot of what a few mode shapes '''in a cylindrical cavity''' look like when viewed perpendicular to the circular cross section plane.

127.0.0.1 at 23:25, 4 June 2015

2015-06-04T23:25:56Z

← Older revision		Revision as of 16:25, 4 June 2015
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	An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>		An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>

	The mode-shape to frequency relation is ~~very~~ sensitive to the ~~exact~~ [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>		The mode-shape to frequency relation is sensitive to the [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>
	Here is a plot of what a few mode shapes '''in a cylindrical cavity''' look like when viewed perpendicular to the circular cross section plane.		Here is a plot of what a few mode shapes '''in a cylindrical cavity''' look like when viewed perpendicular to the circular cross section plane.

Saucyjack: Added link to new Momentum Conservation page.

2015-05-30T17:04:02Z

Added link to new Momentum Conservation page.

← Older revision		Revision as of 10:04, 30 May 2015
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	This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.		This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.

	== Conservation of Energy ~~Discussion~~==		== Conservation of Energy and Momentum ==
	See [[Energy Conservation]].		See [[Energy Conservation]] and [[Momentum Conservation]] for discussions of the implications to these principles.

	== Mode Shape ==		== Mode Shape ==

Saucyjack: Moved content to new "Energy Conservation" page.

2015-05-30T17:02:08Z

Moved content to new "Energy Conservation" page.

@@ Line 2: / Line 2: @@
 == Conservation of Energy Discussion==
+See [[Energy Conservation]].
 == Mode Shape ==

127.0.0.1: /* Mode Shape */

2015-05-26T17:51:03Z

Mode Shape

← Older revision		Revision as of 10:51, 26 May 2015
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	The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>		The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>
			Here is a plot of what a few mode shapes '''in a cylindrical cavity''' look like when viewed perpendicular to the circular cross section plane.

	<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">		<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">

127.0.0.1: /* Mode Shape */

2015-05-26T17:48:42Z

Mode Shape

← Older revision		Revision as of 10:48, 26 May 2015
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	An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>		An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>

	The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> ~~However, a~~ dielectric ~~can be used to help force~~ a ~~selected~~ mode shape ~~upon the cavity~~.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>		The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> A dielectric insert lowers the natural frequency at which a given mode shape takes place.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>

	<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">		<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">

127.0.0.1: /* Conservation of Energy Discussion*/

2015-05-26T17:45:30Z

Conservation of Energy Discussion

← Older revision		Revision as of 10:45, 26 May 2015
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	This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.		This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.

	== Conservation of Energy ~~Violation~~ ==		== Conservation of Energy Discussion==

	Doctor White has proposed that the EM Drive is capable of producing constant thrust at a constant power output. User frobnicat has shown (in the following text and image) that if this were to be true, then the EM Drive could be utilized as a source of unlimited energy. <ref>[http://forum.nasaspaceflight.com/index.php?topic=37438.msg1369806#msg1369806 frobnicat on using the EM Drive for unlimited energy.]</ref> This of course constitutes a violation of [http://en.wikipedia.org/wiki/Conservation_of_energy Conservation of Energy.]		Doctor White has proposed that the EM Drive is capable of producing constant thrust at a constant power output. User frobnicat has shown (in the following text and image) that if this were to be true, then the EM Drive could be utilized as a source of unlimited energy. <ref>[http://forum.nasaspaceflight.com/index.php?topic=37438.msg1369806#msg1369806 frobnicat on using the EM Drive for unlimited energy.]</ref> This of course constitutes a violation of [http://en.wikipedia.org/wiki/Conservation_of_energy Conservation of Energy.]

MazonDel: /* Mode Shape */ Added info about the dielectric.

2015-05-20T20:22:31Z

Mode Shape: Added info about the dielectric.

← Older revision		Revision as of 13:22, 20 May 2015
Line 30:		Line 30:
	An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>		An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>

	The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref>		The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref> However, a dielectric can be used to help force a selected mode shape upon the cavity.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319655#msg1319655 Rodal on the dielectric's contribution to mode shape.]</ref>

	<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">		<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">

Saucyjack: /* Mode Shape */ change link to new Experimental Results page.

2015-05-20T20:13:11Z

Mode Shape: change link to new Experimental Results page.

← Older revision		Revision as of 13:13, 20 May 2015
Line 30:		Line 30:
	An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>		An EM Drive is a cavity resonator that uses the Quality Factor Q to achieve greater response. There is definitely a peak resonant frequency to achieve the highest Q, though besides Q and frequency, mode shape must also be considered. The shape of the electric and magnetic fields inside the cavity at a given frequency.<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319407#msg1319407 Rodal on frequency, Q, and mode shape.]</ref>

	The mode-shape to frequency relation is very sensitive to the exact [[~~Dimensions]]~~ of the cavity. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref>		The mode-shape to frequency relation is very sensitive to the exact [[Experimental Results\|dimensions of the cavity]]. <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1319117#msg1319117 Rodal's post on geometric relations to mode shape.]</ref>

	<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">		<img src="http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=36313.0;attach=632192;image" style="width:15%">