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#11
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Emdrive might change the law of inertia (for the Earth too!)
Superconducting EMDrive Patented:
"Shawyer describes a new EMdrive thruster design that has a single flat superconducting plate on one end, with a uniquely shaped, non-conducting plate on the other. This is necessary to minimiZe the internal Doppler shift - a change in frequency or wavelength of a wave for an observer moving relative to its source - and also keep manufacturing costs down. * It enables the drive to be easily manufactured * It will make a viable superconducting thruster easier. Shawyer believes a superconducting thruster will produce a lot of thrust Shawyer is working with an unnamed UK aerospace company to develop his second generation EM Drive, which he says will produce thrust many orders of magnitude greater than that observed by NASA’s Eagleworks team or any other laboratory." See: http://www.nextbigfuture.com/2016/10...-patented.html |
#13
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Emdrive might change the law of inertia (for the Earth too!)
On 19/10/2016 7:45 AM, wrote:
Superconducting EMDrive Patented: "Shawyer describes a new EMdrive thruster design that has a single flat superconducting plate on one end, with a uniquely shaped, non-conducting plate on the other. This is necessary to minimiZe the internal Doppler shift - a change in frequency or wavelength of a wave for an observer moving relative to its source - and also keep manufacturing costs down. * It enables the drive to be easily manufactured * It will make a viable superconducting thruster easier. Shawyer believes a superconducting thruster will produce a lot of thrust Shawyer is working with an unnamed UK aerospace company to develop his second generation EM Drive, which he says will produce thrust many orders of magnitude greater than that observed by NASA’s Eagleworks team or any other laboratory." See: http://www.nextbigfuture.com/2016/10...-patented.html The patent application is here https://www.ipo.gov.uk/p-find-publication-getPDF.pdf?PatentNo=GB2537119&DocType=A&JournalNum ber=6647 Looks to me like a microwave photon drive, with a bunch of stuff thrown in which may, or may not, actually improve its performance. In particular, I'm sceptical of the super-conducting aspect given the requirement to keep the conductors cold. Even if it works, it is not a reaction-less drive. Photon drives are known to he possible, but they don't produce much thrust. The strategy of obtaining a patent on something that is real, but not particularly effective, can be used to convince clueless investors that they're investing in something revolutionary. Sylvia. |
#14
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Emdrive might change the law of inertia (for the Earth too!)
On 10/19/2016 11:15 PM, Sylvia Else wrote:
The patent application is here https://www.ipo.gov.uk/p-find-publication-getPDF.pdf?PatentNo=GB2537119&DocType=A&JournalNum ber=6647 Thanks! I'll take a closer look when I get the time. Dave |
#15
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Emdrive might change the law of inertia (for the Earth too!)
New NASA Emdrive paper shows force of 1.2 millinewtons per kilowatt in a
Vacuum and a low thrust pendulum and tests were at 40, 60 and 80 watts: "The newest NASA emdrive paper concludes a force generation of 1.2mn/kw after errors measurement is accounted for. A low thrust pendulum at the NASA Johnson space center was used." See: http://www.nextbigfuture.com/2016/11...-force-of.html |
#16
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Emdrive might change the law of inertia (for the Earth too!)
On 11/5/2016 8:47 PM, wrote:
New NASA Emdrive paper shows force of 1.2 millinewtons per kilowatt in a Vacuum and a low thrust pendulum and tests were at 40, 60 and 80 watts: "The newest NASA emdrive paper concludes a force generation of 1.2mn/kw after errors measurement is accounted for. A low thrust pendulum at the NASA Johnson space center was used." See: http://www.nextbigfuture.com/2016/11...-force-of.html Null magnetic field present? Behavior characterized within a magnetic field? Force direction affected by presence and orientation of magnetic field? The cited article, about this paper, says nothing [about that] - phrase optional. Dave |
#17
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Emdrive might change the law of inertia (for the Earth too!)
On 11/6/2016 3:36 PM, David Spain wrote:
Null magnetic field present? Behavior characterized within a magnetic field? Force direction affected by presence and orientation of magnetic field? The cited article, about this paper, says nothing [about that] - phrase optional. Dave The actual link to the paper was in blue text w/o attribution. You have to know to click on the blue text to get to the reference paper. However once there, this looked old to me. There is no date on the paper but the file name says 'Q-Thruster In-Vacuum Fall 2015 Test Report.pdf" which puts it a year behind the DIY'ers over on the NasaSpaceFlight.com forum. Nevertheless, what I said originally stands. You know its not hard to buy or build Helmholtz coils folks. Dave PS: Now OTOH if you can prove there is an all encompassing magnetic field on the cosmic scale.... Well even if you can you probably don't get much: https://arxiv.org/abs/1005.1924 /quote The observational and theoretical upper bounds on IGMF constrain their magnitudes to be below 10−9 G (Barrow, Ferreira & Silk 1997), whereas any value above ∼10−30G is sufficient to explain the ∼μG Galactic magnetic fields generation by the dynamo mechanism (Davis, Lilley & T ̈ornkvist 1999) /end-quote The above paper does not contain a glossary but I'm going with G==gauss. As opposed to the Earth about which Google/Wikipedia says: /quote Its [Earth's magnetic field strength] magnitude at the Earth's surface ranges from 25 to 65 microteslas (0.25 to 0.65 gauss). Roughly speaking it is the field of a magnetic dipole currently tilted at an angle of about 10 degrees with respect to Earth's rotational axis, as if there were a bar magnet placed at that angle at the center of the Earth. /end-quote https://www.google.com/search?q=fiel...utf-8&oe=utf-8 But perhaps propulsion within our solar system? Weeeellll: Again Wikipedia says: /quote The plasma in the interplanetary medium is also responsible for the strength of the Sun's magnetic field at the orbit of the Earth being over 100 times greater than originally anticipated. If space were a vacuum, then the Sun's magnetic dipole field, about 10−4 teslas at the surface of the Sun, would reduce with the inverse cube of the distance to about 10−11 teslas. But satellite observations show that it is about 100 times greater at around 10−9 teslas [0.0001 gauss by my conversion, just to keep apples to apples]. Magnetohydrodynamic (MHD) theory predicts that the motion of a conducting fluid (e.g. the interplanetary medium) in a magnetic field, induces electric currents which in turn generates magnetic fields, and in this respect it behaves like a MHD dynamo. /end-quote https://en.wikipedia.org/wiki/Interp...magnetic_field Not holding my breath. Dave |
#18
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Emdrive might change the law of inertia (for the Earth too!)
Controversial Propellentless EmDrive is said to be undergoing tests in
space on the Tiangong-2 station and US Air Force X-37B plane: "IBTimes UK has been informed that the US Air Force is currently testing out a version of the EmDrive electromagnetic microwave thruster on the X-37B unmanned military space plane, while the Chinese government has made sure to include the EmDrive on its orbital space laboratory Tiangong-2." See: http://www.nextbigfuture.com/2016/11...mdrive-is.html |
#19
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Emdrive might change the law of inertia (for the Earth too!)
On 11/7/2016 7:33 PM, wrote:
Controversial Propellentless EmDrive is said to be undergoing tests in space on the Tiangong-2 station and US Air Force X-37B plane: "IBTimes UK has been informed that the US Air Force is currently testing out a version of the EmDrive electromagnetic microwave thruster on the X-37B unmanned military space plane, while the Chinese government has made sure to include the EmDrive on its orbital space laboratory Tiangong-2." See: http://www.nextbigfuture.com/2016/11...mdrive-is.html This article is a jumble of unattributed "reports" plus known unrelated historical facts vis-a-vis the EMDrive experiments performed in China. Nothing to see here. Dave |
#20
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Emdrive might change the law of inertia (for the Earth too!)
On 11/10/2016 2:59 AM, David Spain wrote:
This article is a jumble of unattributed "reports" plus known unrelated historical facts vis-a-vis the EMDrive experiments performed in China. Nothing to see here. Dave The IBTimes UK article is a jumble of unattributed "reports" plus known unrelated historical facts vis-a-vis the EMDrive experiments performed in China. Nothing to see here. Dave PS: The IBTimes UK website is not ad blocker friendly... |
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