X-15: The Edge of Space

Over the course of 199 flights, the X-15 rocket plane pushed the boundaries of aerospace with trips out to mach 6.7 and altitudes of over 350,000 feet. The extraordinary record of the X-15 has been unmatched in flight test, and remains a fascinating story of pushing experience to the edge of space. Over the course of 199 flights, the X-15 rocket plane pushed the boundaries of aerospace with trips out to mach 6.7 and altitudes of over 350,000 feet. The extraordinary record of the X-15 has been unmatched in flight test, and remains a fascinating story of pushing experience to the edge of space. Over the course of 199 flights, the X-15 rocket plane pushed the boundaries of aerospace with trips out to mach 6.7 and altitudes of over 350,000 feet. The extraordinary record of the X-15 has been unmatched in flight test, and remains a fascinating story of pushing experience to the edge of space. Over the course of 199 flights, the X-15 rocket plane pushed the boundaries of aerospace with trips out to mach 6.7 and altitudes of over 350,000 feet. The extraordinary record of the X-15 has been unmatched in flight test, and remains a fascinating story of pushing experience to the edge of space.