Hayden, J. T.2017-08-182017-08-181968-10http://dspace.lib.cranfield.ac.uk/handle/1826/12337Superconductivity is an effect exhibited by certain materials at very low temperatures in which normal electrical resistivity disappears completely. Summaries of the current theories which attempt to account for this phenomena are presented, and, various proposals for making use of this effect in practical devices are examined and discussed. Proposals for a programme of research in the application of superconductivity to rotating electrical machines are outlined.enReport