Satellite Propulsion Research Ltd (SPR Ltd) a small UK based company, has demonstrated a remarkable new space propulsion technology. The company has successfully tested both an experimental thruster and a demonstrator engine which use patented microwave technology to convert electrical energy directly into thrust. No propellant is used in the conversion process. Thrust is produced by the amplification of the radiation pressure of an electromagnetic wave propagated through a resonant waveguide assembly.

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Latest news

May 2010

The Flight Thruster test programme was successfully completed. See: Flight Programme

June 2010

A paper was presented at the 2nd Conference on Disruptive Technology in Space Activities. See: Toulouse 2010 Paper

Earlier papers presented in a series of international conferences were:

Brighton 2005 paper

IAC 2008 paper

CEAS 2009 paper

August 2010

A Technology Transfer contract with a major US aerospace company was successfully completed. This 10 month contract was carried out under a UK Export Licence and a TAA issued by the US State Department. Details are subject to ITAR regulations.

June 2011

Two papers have been identified, published by Professor Yang Juan of The North Western Polytechnical University, Xi'an, China. These papers provide an independent proof of the theory of EmDrive. Abstracts of these papers are given in Chinese Paper Abstracts. The originals are written in Chinese.