An academic paper that proposes a novel design for a hypersonic vehicle. The vehicle has two intakes, one for 'low-to-medium' speeds (up to Mach 5), and the other is optimized for high-speed (up to Mach 7). Depending on speed, one intake will shut off and the other is opened. Interestingly, the aircraft will rotate 180° to ensure the active/open intake will always be on the underside of the fuselage.