NASA Dryden Flight Research Center has developed a flush airdata sensing (FADS) system on a sharp-nosed, wedge-shaped vehicle. This paper details the design and calibration of a real-time angle-ofattack estimation scheme developed to meet the onboard airdata measurement requirements for a research vehicle equipped with a supersonic-combustion ramjet engine. The FADS system has been designed to ...

The weight of the oxidizer dominates the take-off weight of rocket based propulsion systems. Therefore, airbreathing engines that consume the oxygen from the atmosphere offer a promising alternative. At flight conditions with Mach numbers above 6 SCramjet propulsion systems represent a better suited concept than ramjet systems, as the high static temperature resulting from the deceleration to s...

Abstract A ramjet-mode rotating detonation engine fueled by ethylene is designed to demonstrate the feasibility of organization in annular combustor under high-speed incoming flow condition. The with design total temperature 860 K and Mach number 2 at isolator inlet provided an air-heater, mass about 1.0 kg/s. results show that ramjet can operate mode when equivalence ratio (ER) no less than 0....