Space historian David S. F. Portree writes about the North American X-15 and what lessons can be learned from its reusability : The X-15 Rocket Plane: Implications for Reusable Booster Schedule & Cost (1966) – Wired Science/Wired.com.
Space historian David S. F. Portree writes about the North American X-15 and what lessons can be learned from its reusability : The X-15 Rocket Plane: Implications for Reusable Booster Schedule & Cost (1966) – Wired Science/Wired.com.