Numerical and Experimental Results for a Novel Propulsion Technology Requiring no On-Board Propellant

Fetta, Guido P.

doi:10.2514/6.2014-3853

Cited by 10 publications

(13 citation statements)

References 10 publications

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“…In recent years, it has been developed intense research on the existence of anomalous thrust effects in a resonant microwave cavity [1][2][3][4][5][6][7][8][9]. The investigation for understanding and enhancing the phenomenon can mean the advent of a remarkable new space propulsion technology named electromagnetic drive (EM-Drive) [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Explaining anomalous forces in dielectric EM drives

Porcelli

Filho

2018

IET Science, Measurement & Technology

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The authors report some encouraging results with basis on their calculations to forecast the magnitude of anomalous thrust forces measured in resonant microwave cavities with dielectrics, for two configurations known as Cannae-Drive and Tapered Drive, when operating for high values of power. Despite of the weakness of the forces, both devices could provide us with a novel future propulsion technology by means of a thrust without ejecting propellant. In the calculations, they applied their theoretical model based on the dipole-environment interaction via generalised quantum entanglements (GQE) ensuring the momentum conservation principle. They obtain good agreement with the experimental measurements, although the anomalous forces have weak magnitude. The control and enhancement of the effect can be accomplished by applying GQE hypothesis in order to allow the future viability of a new technology based on quantum electromagnetic propulsion of aircrafts and vehicles.

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Section: Introductionmentioning

confidence: 99%

“…Basically the Cannae-Drive corresponds to a device in a pillbox shape or formed by an asymmetric capacitor with an internal dielectric. The Cannae-Drive was invented by Guido Fetta [4] as a new shape of drive to generate thrust [1,4]. In Fig.…”

Section: Introductionmentioning

confidence: 99%

Explaining anomalous forces in dielectric EM drives

Porcelli

Filho

2018

IET Science, Measurement & Technology

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“…However, later measurements with a different wire torsion pendulum did not show any thrust higher than their measurement uncertainty of 0.7 mN at a power of 230 W [20]. Fetta [21] reported thrust generated from a pancake-shaped cavity at 937 MHz with very high Q values of 10 7 just below liquid helium temperatures of around 10 mN for an input power of 10.5 W. However, his setup and measurement is poorly described. Brady et al [22] further tested Fetta's design on a torsion balance obtaining 22.5 µN with an input power of 28 W at room temperature using a standard solid-state amplifier and a PTFE dielectric at one end.…”

Section: Review Of Emdrive Theory and Experimentsmentioning

confidence: 99%

High-accuracy thrust measurements of the EMDrive and elimination of false-positive effects

Neunzig

Weikert

2021

CEAS Space J

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The EMDrive is a proposed propellantless propulsion concept claiming to be many orders of magnitude more efficient than classical radiation pressure forces. It is based on microwaves, which are injected into a closed tapered cavity, producing a unidirectional thrust with values of at least 1 mN/kW. This was met with high scepticism going against basic conservation laws and classical mechanics. However, several tests and theories appeared in the literature supporting this concept. Measuring a thruster with a significant thermal and mechanical load as well as high electric currents, such as those required to operate a microwave amplifier, can create numerous artefacts that produce false-positive thrust values. After many iterations, we developed an inverted counterbalanced double pendulum thrust balance, where the thruster can be mounted on a bearing below its suspension point to eliminate most thermal drift effects. In addition, the EMDrive was self-powered by a battery-pack to remove undesired interactions due to feedthroughs. We found no thrust values within a wide frequency band including several resonance frequencies and different modes. Our data limit any anomalous thrust to below the force equivalent from classical radiation for a given amount of power. This provides strong limits to all proposed theories and rules out previous test results by at least two orders of magnitude.

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“…This level of force seems high enough to be measurable with a commercial precision balance which has short response time as opposed to that of the torsion pendulum [1,2]. This type of measuring instrument has already been used to detect an EMDrive force [3,7], and it allows us to develop an accurate-enough, handy, and low-cost measuring setup.…”

Section: Solutionsmentioning

confidence: 99%

Proposal of a Handy Setup for Discriminating Parasitic Effects for the Measurement of Impulsive Thrust From a Microwave Cavity

Sokoloff¹,

Pascal²,

Pigaglio³

et al. 2020

PIER C

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This paper details the work of the LAPLACE Electromagnetism Research Group to develop an original measuring setup dedicated to the detection of an EMDrive like force. Recent peer-reviewed experimental results [1, 2] were obtained using similar setups based on a torsion pendulum combined with an optical sensor. These very accurate measurement setups are appropriate for measuring such an extremely weak force. They also appear costly, which may discourage other research teams from working on this topic. Our main goal is then to provide an alternative configuration, based on a commercial precision balance, in order to build a measuring setup more affordable, handy, and accurate enough to measure an EMDrive like force. Our experimental system is capable of feeding a truncated cone shaped 2.45 GHz resonant cavity with power up to 140 W. To calibrate the EMDrive force and avoid false positive thrusts, an original setup has been proposed and evaluated. It allows us to really consider that the parasitic effects do not alter the hypothetical force measurement by the use of force direction switching during the measurement.

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Numerical and Experimental Results for a Novel Propulsion Technology Requiring no On-Board Propellant

Cited by 10 publications

References 10 publications

Explaining anomalous forces in dielectric EM drives

Explaining anomalous forces in dielectric EM drives

High-accuracy thrust measurements of the EMDrive and elimination of false-positive effects

Proposal of a Handy Setup for Discriminating Parasitic Effects for the Measurement of Impulsive Thrust From a Microwave Cavity

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