Many Americans are familiar with the X-Planes developed in the USA. You would be hard-pressed to find an aircraft modeler who is not familiar with the X-1, X-3, X-15, and any of the other experimental aircraft developed over the years. Ask those same modelers to describe the HP.115 XP941, the XG900, or the Payen PA-49, and you might be greeted with a blank stare.
In 300 pages this excellent publication makes available much information about the X-Planes of Europe for the first time. The authors, Tony Buttler and Jean-Louis Delezenne, are experts in their chosen fields. Tony Buttler was a metallurgist for 20 years before becoming a freelance aviation historian specializing in the design and development of military aircraft. X-Planes is Buttler’s 16th book and he has also written a large number of articles for aviation magazines.