| Abstract: | The essential engineering features of aircraft radio and associated difficulties are discussed. Solutions to these problems are given although no attempt has been made to describe particular equipment. Two outstanding radio aids to aerial navigation are discussed and a new method described whereby these may be made to operate a visual indicator in such a way that it will not only tell the pilot whether he is off his course but which way he is off. A heterodyne beacon having certain remarkable directional properties is described. |
