File:Spring.jpg

2015-06-20T03:15:37Z

FxPhilW:

TheTraveller

2015-06-20T03:11:44Z

FxPhilW: Created page with "Originally the build was to replicate the Flight Thruster. Big problem was the cost and range of 3.85GHz Rf amps. Build is now focused on a 2.45GHz design that can be powered..."

Building

2015-06-20T03:03:32Z

FxPhilW:

This page will collect any photos, plans, and instructions for do-it-yourselfers. Efforts with enough documentation will be provided their own pages.

# [[Mulletron's Build]]
# Kurt Zeller (@zellerium) and Brian Kraft from Cal Poly are starting a build as well, using a constant cross-section cavity containing a polymer dielectric.<ref>[https://forum.nasaspaceflight.com/index.php?topic=36313.msg1368153#msg1368153 Forum post by @zellerium]</ref>
# @DIYFan - TBD
# [[@Notsosureofit is planning testing with a Gunn diode]].<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1370647#msg1370647 Later forum post by @Rodal, can't find original post]</ref>
# [[TheTraveller]] <ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1370597#msg1370597 Forum post by @TheTraveller]</ref>
# [[Iulian Berca|@Iulian Berca]]<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1371164#msg1371164 Forum post by @Iulian Berca]</ref> - Fabricated a drive in May 2015 and was posting videos at [http://www.masinaelectrica.com/emdrive-independent-test/ his website]. In [https://www.youtube.com/watch?v=Rbf7735o3hQ Test 3] he reported a force measurement toward "the small end" and later a smaller measurement in the [https://www.youtube.com/watch?v=KAMttfMC8PI reverse orientation in test 3.1]. As of 5/21/15 the magnitude and significance of these measurements were discussed on the [http://forum.nasaspaceflight.com/index.php?topic=36313.msg1377695#msg1377695 NSF forum].
# @SeeShells plans to build a hexagonal frustum out of copper mesh. The small end plate will be adjustable via a stepper motor.<ref>[http://forum.nasaspaceflight.com/index.php?topic=37642.msg1385165#msg1385165 Forum post by @SeeShells]</ref>
# @R. W. Keyes / Andromeda Research - high power, 1-20KW magnetron, superconductor Magnesium diboride on silicon carbide, to start summer 2015
# [[hackaday.io project|@movax (Paul Kocyla) and Jo Hinchliffe]]<ref>[http://forum.nasaspaceflight.com/index.php?topic=36313.msg1372073#msg1372073 Forum post by Hackaday.io]</ref> - Building the original 2.45 GHz thruster according to the Chinese paper and their own 24 GHz design simultaneously, with estimated completion date of July 2015. See [https://hackaday.io/project/5596-em-drive Hackaday project] for more details, as well as [http://n-o-d-e.net/post/119343131451/building-a-diy-emdrive an interview with Paul].
# Dave (@rmfwguy) plans to use a wifi band exciter board as Rf source, wifi booster amp, copper mesh for the frustum body, and no dielectric in the frustum.<ref>[http://forum.nasaspaceflight.com/index.php?action=dlattach;topic=37642.0;attach=978733 @rfmwguy's updated test paper on NasaSpaceFlight forum, now includes bill of materials] </ref>. Starting in July 2015, this will be live-streamed on [http://www.ustream.tv/channel/em-drive-experiment Ustream].<ref>[http://forum.nasaspaceflight.com/index.php?topic=37642.msg1390220#msg1390220 Post by @rfmwguy]</ref>
# @DrBagelBites posted on reddit that he was planning on starting a build.<ref>[https://www.reddit.com/r/EmDrive/comments/38q7m9/going_to_build_an_emdrive_update/ Post by @DrBagelBites on reddit]</ref>
# @kml Testing a non-tapered rectangular waveguide with various dielectrics inserted at one end.<ref>[http://forum.nasaspaceflight.com/index.php?topic=37642.msg1380174#msg1380174 post by @kml]</ref>

If anyone is missing, please add them here.

== Modelling ==
@phaseshift has built a SketchUp model<ref>[http://forum.nasaspaceflight.com/index.php?topic=37642.msg1380107#msg1380107 post by @phaseshift]</ref> ([[File:EM_Thruster.skp]]) of a frustum based on the estimated Shawyer Flight Thruster dimensions.

@TheTraveller constructed a [https://docs.google.com/spreadsheets/d/1MyR1I2TzlOBXV7xnsxw32UGm7-JxbDIkNViC5F09rGU/edit#gid=1647834149 spreadsheet] to model thrust given various design parameters.<ref>[http://forum.nasaspaceflight.com/index.php?topic=37642.msg1382349#msg1382349 Forum post by @TheTraveller]</ref> This model was built with some input from Roger Shawyer directly.

== References ==
<references />

Useful EMDrive Design and Test Tools

2015-06-19T06:54:50Z

FxPhilW:

* '''TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer'''. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>

[[File:SSSmall.jpg]]

* '''Testing an EMDrive''' <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

'''1) Using a scale directly under or offset to one side of the EMDrive.'''

[[File:ShawyerOffsetScale.jpg]]

'''2) Using an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive.'''

[[File:ShawyerSpringOverAScale.jpg]]

'''3) Using a knife edge Teeter Totter Balance Beam.'''

[[File:ShawyerBalanceBeam.jpg]]

'''4) Using a rotary air bearing setup to directly measure acceleration and deceleration.'''

[[File:ShawyerRotaryTestRig.jpg]]

== References ==

----

Useful EMDrive Design and Test Tools

2015-06-19T06:39:15Z

FxPhilW:

* TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>

[[File:SSSmall.jpg]]

* Testing an EMDrive <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

'''1) Using a scale directly under or offset to one side of the EMDrive.'''

[[File:ShawyerOffsetScale.jpg]]

'''2) Using an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive.'''

[[File:ShawyerSpringOverAScale.jpg]]

'''3) Using a knife edge Teeter Totter Balance Beam.'''

[[File:ShawyerBalanceBeam.jpg]]

'''4) Using a rotary air bearing setup to directly measure acceleration and deceleration.'''

[[File:ShawyerRotaryTestRig.jpg]]

== References ==

----

2015-06-19T06:27:26Z

FxPhilW:

Useful EMDrive Design and Test Tools

2015-06-19T06:24:57Z

FxPhilW:

* TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>
* Testing an EMDrive <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

1) Using a scale directly under the EMDrive.

2) Using an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive.

3) Using a knife edge Teeter Totter Balance Beam.

[[File:ShawyerBalanceBeam.jpg]]

4) Using a rotary air bearing setup to directly measure acceleration and deceleration.

[[File:ShawyerRotaryTestRig.jpg]]

== References ==

----

Useful EMDrive Design and Test Tools

2015-06-19T06:24:19Z

FxPhilW:

* TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>
* Testing an EMDrive <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

1) Using a scale directly under the EMDrive.

2) Using an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive

3) Using a knife edge Teeter Totter Balance Beam.

[[File:ShawyerBalanceBeam.jpg]]

4) Using a rotary air bearing setup to directly measure acceleration and deceleration.

[[File:ShawyerRotaryTestRig.jpg]]

== References ==

----

2015-06-19T06:19:02Z

FxPhilW:

Useful EMDrive Design and Test Tools

2015-06-19T06:17:34Z

FxPhilW:

* TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>
* Testing an EMDrive <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

1) Using a scale directly under the EMDrive.

2) Using an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive

3) Using a knife edge Teeter Totter Balance Beam.

4) Using a rotary air bearing setup to directly measure acceleration and deceleration.

== References ==

----

Useful EMDrive Design and Test Tools

2015-06-19T06:17:04Z

FxPhilW:

* TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>
* Testing an EMDrive <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

1) Using a scale directly under the EMDrive.

2) Using an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive

3) Using a knife edge Teeter Totter Balance Beam.
[[File:ShawyerBalanceBeam.png]]

4) Using a rotary air bearing setup to directly measure acceleration and deceleration.

== References ==

----

2015-06-19T02:52:17Z

FxPhilW:

Welcome to the EM Drive wiki.

As this is about the EMDrive, before reading any other information or opinions, you should read the official EMDrive web site and all the papers and test data presented there. You will also find all the Chinese test data and theories.

[http://www.emdrive.com SPR (Roger Shawyer's) EMDrive web site]

This site is a repository of the current information available for the EM Drive project, as discussed in the [http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ 4/29/15 blog post on NasaSpaceFlight.com]. It is currently being researched by several groups around the world, including by a team at NASA Eagleworks. The goal here is to present all the background documentation in one place, so people following the forum threads can quickly get up to speed on what has been previously discussed.

''Please note that this is an unmoderated, community-run site that discusses a rather controversial topic.'' As such, anyone is free to write whatever she/he wants regarding her/his own work or posts regarding the EM Drive. However, other people's work (whether they be posts in the NasaSpaceFlight.com forums or elsewhere) should only be linked or quoted verbatim (but never paraphrased). This will prevent a repeat of the problems witnessed in the past due to the false and/or misleading reports in the media about the current state of EM Drive research.

== Contents ==

[[Frequently Asked Questions]] - A good place to start.

[[Possible Error Sources]] - Attempts to explain anomalous thrust via experimental error or 'conventional' means.

[[Building]] - A few people are trying to build their own.

[[Experimental Results]] - Experimental data provided by currently investigating groups.

[[List of Suggested Experiments]] - A list of as-yet untested EmDrive experiment suggestions.

[[Theory]] - While there's no consensus on any of this, here are various attempts to support (and debunk) it.

[[Generic EM Drive Information]] - A location to compile generic/interesting information (calculations, factoids, etc).

[[Useful Documentation]] - A list of all documentation referenced in the thread.

[[Useful EMDrive Design Tools]] - A list of all publically available EMDrive design tools.

== NasaSpaceFlight.com Links ==

* [http://forum.nasaspaceflight.com/index.php?topic=29276.0 EM Drive Developments - Thread 1] - Original thread on NSF. Closed on 12/12/2014.
* [http://forum.nasaspaceflight.com/index.php?topic=36313.0 EM Drive Developments - Thread 2] - Continuation of Thread 1, providing more detailed analysis of the experimental setup and possible theories of operation. Closed on 5/23/2015.
* [http://forum.nasaspaceflight.com/index.php?topic=37642.0 EM Drive Developments - Thread 3] - Continuation of Thread 2. This is currently the primary thread providing information to this wiki.
* [http://forum.nasaspaceflight.com/index.php?topic=37438.0 Feature Article Discussion] - Focusing on the 4/29/2015 [http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ blog article on NSF], provides less-technical discussion.
* [http://forum.nasaspaceflight.com/index.php?topic=37563.0 EM Drive X-Prize Planning] - Discussion regarding a proposed X-Prize to further interest in EM Drive research.

Main Page

2015-06-19T02:52:05Z

FxPhilW:

Main Page

2015-06-19T02:51:53Z

FxPhilW:

Welcome to the EM Drive wiki.

As this is about the EMDrive, before reading any other information or opinions, you should read the official EMDrive web site and all the papers and test data presented there. You will also find all the Chinese test data and theories.
[http://www.emdrive.com SPR (Roger Shawyer's) EMDrive web site]

This site is a repository of the current information available for the EM Drive project, as discussed in the [http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ 4/29/15 blog post on NasaSpaceFlight.com]. It is currently being researched by several groups around the world, including by a team at NASA Eagleworks. The goal here is to present all the background documentation in one place, so people following the forum threads can quickly get up to speed on what has been previously discussed.

''Please note that this is an unmoderated, community-run site that discusses a rather controversial topic.'' As such, anyone is free to write whatever she/he wants regarding her/his own work or posts regarding the EM Drive. However, other people's work (whether they be posts in the NasaSpaceFlight.com forums or elsewhere) should only be linked or quoted verbatim (but never paraphrased). This will prevent a repeat of the problems witnessed in the past due to the false and/or misleading reports in the media about the current state of EM Drive research.

== Contents ==

[[Frequently Asked Questions]] - A good place to start.

[[Possible Error Sources]] - Attempts to explain anomalous thrust via experimental error or 'conventional' means.

[[Building]] - A few people are trying to build their own.

[[Experimental Results]] - Experimental data provided by currently investigating groups.

[[List of Suggested Experiments]] - A list of as-yet untested EmDrive experiment suggestions.

[[Theory]] - While there's no consensus on any of this, here are various attempts to support (and debunk) it.

[[Generic EM Drive Information]] - A location to compile generic/interesting information (calculations, factoids, etc).

[[Useful Documentation]] - A list of all documentation referenced in the thread.

[[Useful EMDrive Design Tools]] - A list of all publically available EMDrive design tools.

== NasaSpaceFlight.com Links ==

* [http://forum.nasaspaceflight.com/index.php?topic=29276.0 EM Drive Developments - Thread 1] - Original thread on NSF. Closed on 12/12/2014.
* [http://forum.nasaspaceflight.com/index.php?topic=36313.0 EM Drive Developments - Thread 2] - Continuation of Thread 1, providing more detailed analysis of the experimental setup and possible theories of operation. Closed on 5/23/2015.
* [http://forum.nasaspaceflight.com/index.php?topic=37642.0 EM Drive Developments - Thread 3] - Continuation of Thread 2. This is currently the primary thread providing information to this wiki.
* [http://forum.nasaspaceflight.com/index.php?topic=37438.0 Feature Article Discussion] - Focusing on the 4/29/2015 [http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/ blog article on NSF], provides less-technical discussion.
* [http://forum.nasaspaceflight.com/index.php?topic=37563.0 EM Drive X-Prize Planning] - Discussion regarding a proposed X-Prize to further interest in EM Drive research.

Useful EMDrive Design Tools

2015-06-19T02:39:49Z

FxPhilW:

* TheTraveller's Excel based EMDrive design tool, developed in cooperation with Roger Shawyer. <ref>[http://s000.tinyupload.com/index.php?file_id=91209150771293536709 EMDrive Design Tool]</ref>
* Testing an EMDrive <ref>[http://www.emdrive.com/EmDriveForceMeasurement.pdf Measuring Thrust of an EmDrive]</ref>

Please don't get confused by this "Testing an EMDrive" document. Note carefully what Shawyer says.

"A number of methods have been used in the UK, the US and China to measure the
forces produced by an EmDrive thruster. In each successful case, '''the EmDrive force
'''data has been superimposed on an increasing or decreasing background force,'''
generated by the test equipment itself.

Indeed, in the UK '''when the background force changes were eliminated''', in an effort
to improve force measurement resolution, '''no EmDrive force was measured'''. This
was clearly a result of attempting to measure the forces on a fully static thruster,
where T and R cancel each other.

UK flight thruster measurements employ this principle to calibrate the background noise on the force balance prior to carrying out force measurements."

Shawyer has successfully measured EMDrive thrust by:

1) Used a scale directly under the EMDrive.

2) Used an overhead spring to offset some of the EMDrive weight on a scale under the EmDrive

3) Used a knife edge Teeter Totter Balance Beam.

4) Used a rotary air bearing setup to directly measure acceleration and deceleration.

== References ==

----