Approximate Performance of Periodic Hypersonic Cruise Trajectories for Global Reach

This paper develops the analytical framework to compare the approximate performance of periodic hypersonic cruise trajectories with previously proposed hypersonic trajectory profiles for global reach. Specifically, range, ΔV, and payload-carrying capacity are evaluated for various trajectory types to illustrate the enhanced performance achieved by flying periodic hypersonic cruise trajectories with existing hypersonic vehicle aerodynamic, propulsion, and structures technology. Analytical results reveal that periodic hypersonic cruise trajectories achieve better fuel-consumption savings and deliver more payload over long distances (≈20,000 km) than other trajectory types proposed for high-speed flight. Over 20% improvement in fuel consumption savings is possible for a Mach 10 vehicle with a modest L/D of 4, and a curve-fitted rocket-based combined cycle engine model.