This is the story of the largest Mach 3 aircraft ever flown the North American Aviation XB-70A Valkyrie. Dennis R. Jenkins and Tony R. Landis have conducted extensive research in military, NASA, and company archives to find previously uncovered aspects of this fascinating program. Includes descriptions of the proposed bombing and navigation systems, defensive armament, electronic countermeasures, and early attempts at stealth technology. Accompanied by over 250 photos and dozens of illustrations, this in-depth history covers the entire B-70 program, not just the two aircraft that ultimately flew.

Dr Bradley's aim is to provide a work which will introduce readers to the philosophical standpoint employed by Mach in his expositions of physics. The author shows how Mach traces out the evolution of the metrical concepts of heat and mechanics, and includes a discussion of his reformulation of Newton's dynamical principles. Mach's view that we have a semi-awareness of both time and temperature is considered: there is no 'Mach Principle' in Mach's writings; the use of the term by Einstein and others has led to confusion, which the author attempts to remove. The newcomer to the philosophy of science is led to an insight into the methods of one who has had a major influence on the subject.