Major Robert White’s X-15 Space Flight

The X-15 Space Plane had a top speed of Mach 6.72 (4,520 mph, 7,274 km/h) a service ceiling of 67 mi (108 km, 354,330 ft) and a blistering climb rate of 60,000 ft/min (18,288 m/min), the space planes were fuelled with liquid oxygen propellant and hydrogen peroxide.

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