A.C. Power and Aeroplane Accessories

IT is slightly over two years since the U.S.A.A.F. asked some of the leading electrical manufacturers of the country to undertake the development of a wholly new alternating‐current electrical system for aircraft. While some of the details are not ready for publication, enough can be revealed to make this an opportune time to review the progress which has been made, and to evaluate the significance of this highly publicized development.