American X & Y Planes: Volume 1: Experimental Aircraft to 1945

Many of the most interesting aircraft ever built existed only as prototypes or experimental types, and many have been overlooked by historians as a result. This book, the first of a two-volume history of the USA's 'X' and 'Y' planes from the earliest years of aviation to the present day, tells the history of these little-known but often very important machines up to the end of World War Two.