EM Drive

This paper describes the eight-day August 2013 test campaign designed to investigate and demonstrate viability of using classical magnetoplasmadynamics to obtain a propulsive momentum transfer via the quantum vacuum virtual plasma. This paper will not address the physics of the quantum vacuum plasma thruster, but instead will describe the test integration, test operations, and the results obtained from the test campaign. Approximately 30-50 micro-Newtons of thrust were recorded from an electric propulsion test article consisting primarily of a radio frequency (RF) resonant cavity excited at approximately 935 megahertz. Testing was performed on a low-thrust torsion pendulum that is capable of detecting force at a single-digit micronewton level, within a stainless steel vacuum chamber with the door closed but at ambient atmospheric pressure. Several different test configurations were used, including two different test articles as well as a reversal of the test article orientation. In addition, the test article was replaced by an RF load to verify that the force was not being generated by effects not associated with the test article. The two test articles were designed by Cannae LLC of Doylestown, Pennsylvania. The torsion pendulum was designed, built, and operated by Eagleworks Laboratories at the NASA Johnson Space Center of Houston, Texas. Approximately six days of test integration were required, followed by two days of test operations, during which, technical issues were discovered and resolved. Integration of the two test articles and their supporting equipment was performed in an iterative fashion between the test bench and the vacuum chamber. In other words, the test article was tested on the bench, then moved to the chamber, then moved back as needed to resolve issues. Manual frequency control was required throughout the test. Thrust was observed on both test articles, even though one of the test articles was designed with the expectation that it would not produce thrust. Specifically, one test article contained internal physical modifications that were designed to produce thrust, while the other did not (with the latter being referred to as the "null" test article). Test data gathered includes torsion pendulum displacement measurements which are used to calculate generated force, still imagery in the visible spectrum to document the physical configuration, still imagery in the infrared spectrum to characterize the thermal environment, and video imagery. Post-test data includes static and animated graphics produced during RF resonant cavity characterization using the COMSOL Multiphysics® software application. Excerpts from all of the above are included and discussed in this paper. Lessons learned from test integration and operations include identification of the need to replace manual control of the resonant cavity target frequency with an automated frequency control capability. Future test plans include the development of an automatic frequency control circuit. Test results indicate that the RF resonant cavity thruster design, which is unique as an electric propulsion device, is producing a force that is not attributable to any classical electromagnetic phenomenon and therefore is potentially demonstrating an interaction with the quantum vacuum virtual plasma. Future test plans include independent verification and validation at other test facilities.

one or two more questions for FAQ list...

Hello,

I've read media reports and crtiques of EmDrive, which brought me to your page, where after scouring through FAQ I couldn't find answer to relatively simple question, that I think would interest many.

Question is, if forces with ordinary materials are marginal, and with superconducting materials can be many magnitudes higher:

- why is it taking so long for you to show with even a crude superconducting prototype that would demonstrate obviously visible effect ?

- there are many RF cavities around, some of the superconducting in laboratories around the world. Why hasn' through all these years someone noticed such effect ?

Thanks in advance

trololo2 je 25. okt 2014 ob 15:41 izjavil:

vostok_1 je 25. okt 2014 ob 14:39 izjavil:

Opomba: Da ne bo pomote...nisem 100% ali gre v videu za kitajsko verzjo ali od nekega privatnika.

Also upload je star skoraj 7 let. Bi pričakoval nekaj napredka v takem času...

Chinese Northwestern Polytechnical University (NWPU)

In 2008, Wired magazine reported that a team of Chinese researchers led by Juan Yang (杨涓), professor of propulsion theory and engineering of aeronautics and astronautics at Northwestern Polytechnical University (NWPU) in Xi'an, claimed to have developed a valid electro-magnetic theory behind the Emdrive.[4][24] A demonstration version of the drive was built and tested under different cavity shapes and at higher power levels in 2010.[11] A maximum thrust of 720 mN was reported at 2500 W of input power on an aerospace engine test stand usually used to precisely test spacecraft engines like ion drives.[8][12][13][25]

Q. How can the EmDrive produce enough thrust for terrestrial applications?
A. The second generation engines will be capable of producing a specific thrust of 30kN/kW. Thus for 1 kilowatt (typical of the power in a microwave oven) a static thrust of 3 tonnes can be obtained, which is enough to support a large car. This is clearly adequate for terrestrial transport applications.
The static thrust/power ratio is calculated assuming a superconducting EmDrive with a Q of 5 x 109. This Q value is routinely achieved in superconducting cavities.
Note however, because the EmDrive obeys the law of conservation of energy, this thrust/power ratio rapidly decreases if the EmDrive is used to accelerate the vehicle along the thrust vector. (See Equation 16 of the theory paper). Whilst the EmDrive can provide lift to counter gravity, (and is therefore not losing kinetic energy), auxiliary propulsion is required to provide the kinetic energy to accelerate the vehicle.

100g/kW dviga...rabil bi 100kW generator za dvignit 10kg. Za dvignit lahek avto bi rabil 5MW generator. Skratka...idjotizem.

There is one joker in the pack. It seems force produced falls as the payload accelerates, so this is an engine with a "top speed" limit. It's not clear to me how high that limit is.