Quote from: txdrive on 05/18/2015 08:45 pmQuote from: TheTraveller on 05/18/2015 08:43 pmQuote from: txdrive on 05/18/2015 08:41 pmQuote from: TheTraveller on 05/18/2015 08:30 pmQuote from: txdrive on 05/18/2015 08:27 pmSo your thrust is in opposite direction from EagleWorks, right?Movement is as per Shawyer. From the big end toward the small end.Watch the video to see which way it moves.http://emdrive.com/dynamictests.htmlAs per Shawyer's theory papers, it should be moving wide end forward.Reaction / EM Drive physical movement is in the opposite direction to Thrust direction. He has stated this many times.http://www.emdrive.com/theorypaper9-4.pdfQuoteThe group velocity of the electromagnetic wave at the end plate of the largersection is higher than the group velocity at the end plate of the smaller section. Thusthe radiation pressure at the larger end plate is higher that that at the smaller end plate.The resulting force difference (F g1 -F g2 ) is multiplied by the Q of the resonantassembly.So, it would have to be mounted the larger plate forward if you want your ship to go forward.Spacecraft move in the opposite direction to the thrust of the engine. EM Drive is no different.
Quote from: TheTraveller on 05/18/2015 08:43 pmQuote from: txdrive on 05/18/2015 08:41 pmQuote from: TheTraveller on 05/18/2015 08:30 pmQuote from: txdrive on 05/18/2015 08:27 pmSo your thrust is in opposite direction from EagleWorks, right?Movement is as per Shawyer. From the big end toward the small end.Watch the video to see which way it moves.http://emdrive.com/dynamictests.htmlAs per Shawyer's theory papers, it should be moving wide end forward.Reaction / EM Drive physical movement is in the opposite direction to Thrust direction. He has stated this many times.http://www.emdrive.com/theorypaper9-4.pdfQuoteThe group velocity of the electromagnetic wave at the end plate of the largersection is higher than the group velocity at the end plate of the smaller section. Thusthe radiation pressure at the larger end plate is higher that that at the smaller end plate.The resulting force difference (F g1 -F g2 ) is multiplied by the Q of the resonantassembly.So, it would have to be mounted the larger plate forward if you want your ship to go forward.
Quote from: txdrive on 05/18/2015 08:41 pmQuote from: TheTraveller on 05/18/2015 08:30 pmQuote from: txdrive on 05/18/2015 08:27 pmSo your thrust is in opposite direction from EagleWorks, right?Movement is as per Shawyer. From the big end toward the small end.Watch the video to see which way it moves.http://emdrive.com/dynamictests.htmlAs per Shawyer's theory papers, it should be moving wide end forward.Reaction / EM Drive physical movement is in the opposite direction to Thrust direction. He has stated this many times.
Quote from: TheTraveller on 05/18/2015 08:30 pmQuote from: txdrive on 05/18/2015 08:27 pmSo your thrust is in opposite direction from EagleWorks, right?Movement is as per Shawyer. From the big end toward the small end.Watch the video to see which way it moves.http://emdrive.com/dynamictests.htmlAs per Shawyer's theory papers, it should be moving wide end forward.
Quote from: txdrive on 05/18/2015 08:27 pmSo your thrust is in opposite direction from EagleWorks, right?Movement is as per Shawyer. From the big end toward the small end.Watch the video to see which way it moves.http://emdrive.com/dynamictests.html
So your thrust is in opposite direction from EagleWorks, right?
The group velocity of the electromagnetic wave at the end plate of the largersection is higher than the group velocity at the end plate of the smaller section. Thusthe radiation pressure at the larger end plate is higher that that at the smaller end plate.The resulting force difference (F g1 -F g2 ) is multiplied by the Q of the resonantassembly.
When he makes a weight measurement, he is weighing the device plus whatever air/water vapour is inside it. Therefore when there is less air inside the device, the device will weigh less. It's as simple as that. Why should a higher temperature result in less air inside the device? - that's because the density of air depends on its temperature; it decreases with higher temperature. Since the device volume is constant and the density of air has dropped, there must be less air mass inside the device at higher temperature.mass = density * volume.And this is no "tiny artifact" - it's an effect on order negative half a gram, which turns out to be exactly what was measured.
Quote from: TheTraveller on 05/18/2015 08:52 pmQuote from: txdrive on 05/18/2015 08:45 pmQuote from: TheTraveller on 05/18/2015 08:43 pmQuote from: txdrive on 05/18/2015 08:41 pmQuote from: TheTraveller on 05/18/2015 08:30 pmQuote from: txdrive on 05/18/2015 08:27 pmSo your thrust is in opposite direction from EagleWorks, right?Movement is as per Shawyer. From the big end toward the small end.Watch the video to see which way it moves.http://emdrive.com/dynamictests.htmlAs per Shawyer's theory papers, it should be moving wide end forward.Reaction / EM Drive physical movement is in the opposite direction to Thrust direction. He has stated this many times.http://www.emdrive.com/theorypaper9-4.pdfQuoteThe group velocity of the electromagnetic wave at the end plate of the largersection is higher than the group velocity at the end plate of the smaller section. Thusthe radiation pressure at the larger end plate is higher that that at the smaller end plate.The resulting force difference (F g1 -F g2 ) is multiplied by the Q of the resonantassembly.So, it would have to be mounted the larger plate forward if you want your ship to go forward.Spacecraft move in the opposite direction to the thrust of the engine. EM Drive is no different.http://exploration.grc.nasa.gov/education/rocket/rktth1.html
So should everyone be using perforated copper sheeting?? Admittedly, I can't even begin to imagine how this would affect the performance of the drive. Do the various theories need a solid wall or as long as the perforations are sufficiently fine it should not matter?? https://concordsheetmetal.com/store/perforated-copper/
...Spacecraft move in the opposite direction to the thrust of the engine. EM Drive is no different.
Quote from: demofsky on 05/18/2015 09:28 pmSo should everyone be using perforated copper sheeting?? Admittedly, I can't even begin to imagine how this would affect the performance of the drive. Do the various theories need a solid wall or as long as the perforations are sufficiently fine it should not matter?? https://concordsheetmetal.com/store/perforated-copper/Might be hard to roll into a smooth frustum.I plan to drill 6 x 1mm diameter holes 5mm in from each end of the frustum and the same around the central diameter to allow heated air to escape without causing any major issues.
Quote from: TheTraveller on 05/18/2015 08:52 pm...Spacecraft move in the opposite direction to the thrust of the engine. EM Drive is no different.Propellant comes out of a rocket engine. According to Shawyer nothing comes out of an EM Drive.If nothing is coming out of the EM Drive, how can it have a thrust force in the opposite direction to its acceleration?Has someone measured that thust force you are referring to ? If this thrust force of the EM Drive has been measured, how was the thrust force measured simultaneously with a measurement of the acceleration in the opposite direction ?
Quote from: demofsky on 05/18/2015 09:28 pmSo should everyone be using perforated copper sheeting?? Admittedly, I can't even begin to imagine how this would affect the performance of the drive. Do the various theories need a solid wall or as long as the perforations are sufficiently fine it should not matter?? https://concordsheetmetal.com/store/perforated-copper/Might be hard to roll into a smooth frustum.I plan to drill 6 x 1mm diameter equally spaced holes 5mm in from each end of the frustum and the same around the central diameter to allow heated air to escape without causing any major issues.
Quote from: Rodal on 05/18/2015 09:36 pmQuote from: TheTraveller on 05/18/2015 08:52 pm...Spacecraft move in the opposite direction to the thrust of the engine. EM Drive is no different.Propellant comes out of a rocket engine. According to Shawyer nothing comes out of an EM Drive.If nothing is coming out of the EM Drive, how can it have a thrust force in the opposite direction to its acceleration?Has someone measured that thust force you are referring to ? If this thrust force of the EM Drive has been measured, how was the thrust force measured simultaneously with a measurement of the acceleration in the opposite direction ? As you well know it was measured and reported here:
Quote from: TheTraveller on 05/18/2015 09:32 pmQuote from: demofsky on 05/18/2015 09:28 pmSo should everyone be using perforated copper sheeting?? Admittedly, I can't even begin to imagine how this would affect the performance of the drive. Do the various theories need a solid wall or as long as the perforations are sufficiently fine it should not matter?? https://concordsheetmetal.com/store/perforated-copper/Might be hard to roll into a smooth frustum.I plan to drill 6 x 1mm diameter equally spaced holes 5mm in from each end of the frustum and the same around the central diameter to allow heated air to escape without causing any major issues.Hm. I can see folks being more comfortable with holes around the central diameter. Holes at either end could result in debates over whether this was causing thrust towards one end or the other, biasing the results...
Quote from: demofsky on 05/18/2015 09:28 pmSo should everyone be using perforated copper sheeting?? Admittedly, I can't even begin to imagine how this would affect the performance of the drive. Do the various theories need a solid wall or as long as the perforations are sufficiently fine it should not matter?? https://concordsheetmetal.com/store/perforated-copper/It should not matter. Millions of microwave ovens with glass transparent to microwaves are covered with this perforated metal to prevent the microwaves from escaping the microwave open and hurting humans.At least the small and big flat ends could be made of perforated metal.The opening in the mesh is equivalent to a very small wavelength.
Quote from: demofsky on 05/18/2015 09:42 pmQuote from: TheTraveller on 05/18/2015 09:32 pmQuote from: demofsky on 05/18/2015 09:28 pmSo should everyone be using perforated copper sheeting?? Admittedly, I can't even begin to imagine how this would affect the performance of the drive. Do the various theories need a solid wall or as long as the perforations are sufficiently fine it should not matter?? https://concordsheetmetal.com/store/perforated-copper/Might be hard to roll into a smooth frustum.I plan to drill 6 x 1mm diameter equally spaced holes 5mm in from each end of the frustum and the same around the central diameter to allow heated air to escape without causing any major issues.Hm. I can see folks being more comfortable with holes around the central diameter. Holes at either end could result in debates over whether this was causing thrust towards one end or the other, biasing the results...Holes would be in the side walls, not in the end plates. Hard to see how 6 x 1mm diameter holes even spaced around the ends of the frustum could generate significant thrust.Easy to block and unblock during different test runs.
Quote from: TheTraveller on 05/18/2015 09:40 pmQuote from: Rodal on 05/18/2015 09:36 pmQuote from: TheTraveller on 05/18/2015 08:52 pm...Spacecraft move in the opposite direction to the thrust of the engine. EM Drive is no different.Propellant comes out of a rocket engine. According to Shawyer nothing comes out of an EM Drive.If nothing is coming out of the EM Drive, how can it have a thrust force in the opposite direction to its acceleration?Has someone measured that thust force you are referring to ? If this thrust force of the EM Drive has been measured, how was the thrust force measured simultaneously with a measurement of the acceleration in the opposite direction ? As you well know it was measured and reported here:No, I don't know that.I see a chart that Shawyer put together. Nobody here could explain why the Demo Engine has it in both directions.I never saw a paper detailing how such a thrust was measured simultaneously with measuring the acceleration in the opposite direction.
...Shawyer is in business to sell licenses, not to give it all away so any DIY guy can replicate and go into business against SPR and it's clients.There are holes in what he has put in the public domain. I doubt he has any intention of filling them in. For guys like me, working to replicate the EM Drive, we need to learn to follow the bread crumb trail he has left. For me, that trail is strong and delivering good intel.I'm highly confident of replicating his Flight Thruster and getting close to his results.