Collection of papers compiled by D W Alford relating to the development of an oscillogyro at the Ferranti Aircraft Equipment Department, Bracknell and later Ferranti Defence Systems Ltd, Edinburgh, comprised of reports, papers given at AGARD and IMechE conferences, papers relating to the development of the oscillogyro in three phases, papers compiled by D W Alford as a consultant on the continued development of the oscillogyro in Bracknell and Edinburgh, papers relating to the history of the oscillogyro, and photographs showing the development and testing of the oscillogyro.