The Finite Element and the Finite Difference calculations of NASA's EM Drive confirm that the electromagnetic fields are spherical standing waves away from the flat ends.For a given spherical radius, the bigger the cone's angle, the more different is the spherical surface from a flat end, and the more important is to have spherical ends. Kudos to Shawyer for being the first EM Drive researcher to realize this.
....My gut feeling (i know, hardly a scientific approach) says that the chinese drawing has little to no correlation to the real testunit they've build.
Quote from: Rodal on 02/20/2015 11:59 pmThe Finite Element and the Finite Difference calculations of NASA's EM Drive confirm that the electromagnetic fields are spherical standing waves away from the flat ends.For a given spherical radius, the bigger the cone's angle, the more different is the spherical surface from a flat end, and the more important is to have spherical ends. Kudos to Shawyer for being the first EM Drive researcher to realize this.Got it! It is all about having equal distances for the bouncing waves between the 2 top/bottom surfaces. Basically, it is a truncated spherical cone...http://mathworld.wolfram.com/SphericalCone.htmlthnx for the clarification...
http://eec.wustl.edu/aboutthedepartment/Pages/news-story.aspx?news=7577&source=adminhttp://adsabs.harvard.edu/abs/2014NatPh..10..394Phttp://ieeexplore.ieee.org/iel7/4563994/4814557/06690216.pdfMan we need way stronger magnetic fields and better materials in that thing. The more I keep reading about this subject of PT symmetry breaking the clearer it becomes that this is routine.
Quote from: Mulletron on 02/21/2015 07:57 amhttp://eec.wustl.edu/aboutthedepartment/Pages/news-story.aspx?news=7577&source=adminhttp://adsabs.harvard.edu/abs/2014NatPh..10..394Phttp://ieeexplore.ieee.org/iel7/4563994/4814557/06690216.pdfMan we need way stronger magnetic fields and better materials in that thing. The more I keep reading about this subject of PT symmetry breaking the clearer it becomes that this is routine.To my mind, the most interesting aspect of these papers is the incorporation of non-linear materials generating additional frequency components.
Quote from: Flyby on 02/21/2015 09:19 am....My gut feeling (i know, hardly a scientific approach) says that the chinese drawing has little to no correlation to the real testunit they've build.What Chinese drawing are you referring to? Could you please give a link or a reference to it? Thanks
Quote from: Notsosureofit on 02/21/2015 12:40 pmQuote from: Mulletron on 02/21/2015 07:57 amhttp://eec.wustl.edu/aboutthedepartment/Pages/news-story.aspx?news=7577&source=adminhttp://adsabs.harvard.edu/abs/2014NatPh..10..394Phttp://ieeexplore.ieee.org/iel7/4563994/4814557/06690216.pdfMan we need way stronger magnetic fields and better materials in that thing. The more I keep reading about this subject of PT symmetry breaking the clearer it becomes that this is routine.To my mind, the most interesting aspect of these papers is the incorporation of non-linear materials generating additional frequency components.Agreed. From the point of view of solving the dispersion problem, the nonlinearity of the materials involved is what makes a difference, at least at first sight ?.
Quote from: Rodal on 02/21/2015 12:31 pmQuote from: Flyby on 02/21/2015 09:19 am....My gut feeling (i know, hardly a scientific approach) says that the chinese drawing has little to no correlation to the real testunit they've build.What Chinese drawing are you referring to? Could you please give a link or a reference to it? Thanks"the Chinese (drawings) do not look alike each others"
Quote from: Rodal on 02/21/2015 12:43 pmQuote from: Notsosureofit on 02/21/2015 12:40 pmQuote from: Mulletron on 02/21/2015 07:57 amhttp://eec.wustl.edu/aboutthedepartment/Pages/news-story.aspx?news=7577&source=adminhttp://adsabs.harvard.edu/abs/2014NatPh..10..394Phttp://ieeexplore.ieee.org/iel7/4563994/4814557/06690216.pdfMan we need way stronger magnetic fields and better materials in that thing. The more I keep reading about this subject of PT symmetry breaking the clearer it becomes that this is routine.To my mind, the most interesting aspect of these papers is the incorporation of non-linear materials generating additional frequency components.Agreed. From the point of view of solving the dispersion problem, the nonlinearity of the materials involved is what makes a difference, at least at first sight ?.As a starting ferinstance, how much native copper oxide is present on the inner surfaces of the cavity ? Enough to convert 10-7 ?
Quote from: Notsosureofit on 02/21/2015 01:09 pmQuote from: Rodal on 02/21/2015 12:43 pmQuote from: Notsosureofit on 02/21/2015 12:40 pmQuote from: Mulletron on 02/21/2015 07:57 amhttp://eec.wustl.edu/aboutthedepartment/Pages/news-story.aspx?news=7577&source=adminhttp://adsabs.harvard.edu/abs/2014NatPh..10..394Phttp://ieeexplore.ieee.org/iel7/4563994/4814557/06690216.pdfMan we need way stronger magnetic fields and better materials in that thing. The more I keep reading about this subject of PT symmetry breaking the clearer it becomes that this is routine.To my mind, the most interesting aspect of these papers is the incorporation of non-linear materials generating additional frequency components.Agreed. From the point of view of solving the dispersion problem, the nonlinearity of the materials involved is what makes a difference, at least at first sight ?.As a starting ferinstance, how much native copper oxide is present on the inner surfaces of the cavity ? Enough to convert 10-7 ?Excellent question.
....While the formula I've been using is based on satisfying General Relativity, it does not tell us anything about the mechanism of momentum conservation.. PT asymmetry, as Mulletron mentions, is a viable candidate, and nonlinear frequency effects could (in theory) satisfy the requirement.
The photo is a bit blurry and that makes estimating a bit challenging, and there are lens distortions to the photo, but nothing too major. If the concrete block happened to be the standard width of 440 mm, cited by wikipedia, then the dimensions would be roughly as estimated in the chart.I'm an artist, not a physicist. If these dimensions seem wrong and you have a different guess for the width of the concrete block, let me know and I'll recalculate based on your width standard.
There are a lot of references to nonlinear effects in polyethylene, but most seem to be due to impurities of one sort or another.
Quote from: Notsosureofit on 02/21/2015 03:17 pmThere are a lot of references to nonlinear effects in polyethylene, but most seem to be due to impurities of one sort or another.So nonlinearity of the HD PE, rather than being by intelligent design, would be by accidental impurity, due to lax quality control in the manufacture of the industrially supplied bulk HD PE used by NASA Eagleworks.
Quote from: Rodal on 02/21/2015 03:44 pmQuote from: Notsosureofit on 02/21/2015 03:17 pmThere are a lot of references to nonlinear effects in polyethylene, but most seem to be due to impurities of one sort or another.So nonlinearity of the HD PE, rather than being by intelligent design, would be by accidental impurity, due to lax quality control in the manufacture of the industrially supplied bulk HD PE used by NASA Eagleworks.That's a possibility. Could also explain the difference between some chambers w/ and w/o dielectric
Quote from: Notsosureofit on 02/21/2015 03:47 pmQuote from: Rodal on 02/21/2015 03:44 pmQuote from: Notsosureofit on 02/21/2015 03:17 pmThere are a lot of references to nonlinear effects in polyethylene, but most seem to be due to impurities of one sort or another.So nonlinearity of the HD PE, rather than being by intelligent design, would be by accidental impurity, due to lax quality control in the manufacture of the industrially supplied bulk HD PE used by NASA Eagleworks.That's a possibility. Could also explain the difference between some chambers w/ and w/o dielectric Still, what types and how much impurity would be necessary to take place in order to have significant nonlinear effects?
Quote from: Rodal on 02/21/2015 03:48 pmQuote from: Notsosureofit on 02/21/2015 03:47 pmQuote from: Rodal on 02/21/2015 03:44 pmQuote from: Notsosureofit on 02/21/2015 03:17 pmThere are a lot of references to nonlinear effects in polyethylene, but most seem to be due to impurities of one sort or another.So nonlinearity of the HD PE, rather than being by intelligent design, would be by accidental impurity, due to lax quality control in the manufacture of the industrially supplied bulk HD PE used by NASA Eagleworks.That's a possibility. Could also explain the difference between some chambers w/ and w/o dielectric Still, what types and how much impurity would be necessary to take place in order to have significant nonlinear effects?Good question. One of the papers Mulletron brought up:http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6690216has interesting curves showing the frequency shifts. Maybe Mulletron has a PT input on this point ?