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1. F. X. Canning, C. Melcher, E. Winet, Asymmetrical Capacitors for Propulsion, NASA Scientific report, West Virginia, 2004.
2. J. Primas, M. Malík, D. Jašíková, V. Kopecký, “Force on high voltage capacitor with asymmetrical electrodes,” Proceedings of WASET 2010 Conference, Amsterdam, 2010, pp. 335339. ISSN 1307-6892.
3. T. B. Bahder, Ch. Fazi, Force on an Asymmetric Capacitor, U.S. Army Research Laboratory Report, Adelphi, 2003.
4. J. Primas, M. Malík, D. Jašíková, V. Kopecký, “Description of the Force on a High Voltage Asymmetrical Capacitor,” ISMOT Proceedings 2011 Conference, Praha: FEL ČVUT, 2011. ISBN 978-80-01-04887-0.

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This paper deals with the effects surrounding phenomenon of a mechanical force generated on a high voltage asymmetrical capacitor (the so called Biefeld-Brown effect). A method to measure this force is described and a formula to calculate its value is also given. Based on this the authors derive a formula characterising the neutral air flow velocity impacting an asymmetrical capacitor connected to high voltage. This air flow under normal circumstances lessens the generated force. In the following part this velocity is measured using Particle Image Velocimetry measuring technique and the results of the theoretically calculated velocity and the experimentally measured value are compared. The authors found a good agreement between the results of both approaches.


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