Talk-Polywell.org

I agree, except for the early slide which mentioned 'CANNAE Superconducting' test results this year at about 900 mN/kW, a much bigger number than I recalled. 900 mN/kW was the numbers. Cannae claimed to have measured 8-10 mN of thrust with 10.5 watt of power in their superconducting test article in...

EmDrive inventor Roger Shawyer gave a presentation at IAC 2014 conference in Toronto, 3 October 2014: Second Generation EmDrive Propulsion applied to SSTO Launcher and Interstellar Probe There are interesting details for a new asymmetric tapered cavity, which is no more a frustum and has several enh...

mattman wrote:

The magnetic field structure is exactly how I described it in my previous post page 2 of this topic. This is plasma confinement by magnetic pressure gradient inversion.

I see it that way, with three coils. Two small end coils, and a larger one in the middle, as shown in the picture published by LM in previous page (EDIT: and by DeltaV just above my present post). Let's have an electric current running in the same direction inside the two smaller coils, like a Helmh...

I count 5 coils. Numbering 1-5 as nearest-farthest, coil 3 (center coil) appears to have the largest diameter. Ignoring the two end coils, this looks like an "inverse" of Torulf's "synthetic" FRC Indeed. http://newsdaily.com/wp-content/uploads/2014/10/tagreuters.com2014binary_LYNXNPEA9E0V6-FILEDIMA...

FYI: This info release is relatively new and it might not have been discussed here before, so here’s some recent results from NASA… http://www.libertariannews.org/wp-content/uploads/2014/07/AnomalousThrustProductionFromanRFTestDevice-BradyEtAl.pdf Your link is the full NASA paper (from Eagleworks) ...

I also found this Eagleworks document from last year: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140000851.pdf which states (page 40) the SFE test article from Boeing/DARPA produced 20 to 110 µN of thrust on their pendulum. This would be comparable to the force produced by the EmDrive te...

From Woodward's list, a VERY interesting exchange about klystrons and fine tuning of RF frequency in a waveguide: KLYSTRON: A klystron has multiple resonant cavities with a coaxial electron beam.  The electron beam causes the cavities to ring-- thereby transferring energy from the beam to the electr...

I don't think you can pump several kilowatts of laser energy into a cavity… or can you? You have a quite powerful laser then. I know military firms like Lockheed or Boeing produced 10 to 30 kW lasers, but lasers available for people on the market nowadays are from milliwatts to a a few watts only. P...

Tom, magnetrons are cheap, but they scream too much different frequencies, out of the resonance you need for the cavity. Because of that you only finally get a marginal amount of effective power used for resonance in the cavity, even with a 2.5 kW magnetron. You'd rather choose klystrons . Klystrons...

how does one create exotic matter, and what exactly is it supposed to be? "Exotic matter" is simply matter with negative mass and energy. We don't observe it in nature. It hasn't been created in lab, for example within particle accelerators. First theoretical possibility to create exotic matter (or...

There are already theories that don't break the laws of physics. We simply don't know yet if any of them corresponds to the EmDrive physics. I tried to sum up all proposed working principles for the EmDrive, the good ones and the bad: Radiation pressure : Roger Shawyer's explanation about radiation ...

1. I'm far from a physicist, but I recall that 'Hawking Radiation' is caused by gravitational effects near an event horizon tearing virtual particle pairs apart. So the assertion that virtual particles don't gravitate is at least suspect. Yeah, if only black holes really existed… hem sorry, nevermi...

Any chance they already have the materials needed to build one of these on the ISS? And then chuck it out an airlock to test it? It's the only way people will be definitively convinced (if the thing actually works). I see various possibilities that would keep ramping interest and development up (as...

Another article, this time with the full NASA paper inside (second link, after Wired ): Suede, Michael (31 July 2014). "NASA Confirms New EM Thruster Violates Laws Of Conservation" . Libertarian News . Gets a fail. Obviously written by a non-science person reporting about stuff they haven't fact ch...