Davies. Featuring both archive photographs and digital artwork, this visual profile examines one of the most famous aircraft ever created: the record-breaking X-15. Examine all of its most memorable feats including its sound barrier-smashing Mach 6.7 speed and 350,000-foot altitude. Also, get specific insight on each of the three planes' 199 flights and the testing of its new technology and techniques. 80 pages, illustrated, 7¼"x 10", softcover.