Abstract: A variable-cycle storable fuels engine having three cycles is provided. The engine operates as an air-augmented rocket from launch to approximately Mach 3. From approximately Mach 3 to Mach 8, the engine operates as a dual mode ramjet/scramjet to altitudes exceeding 100,000 feet. Thereafter, the engine operates as a conventional pure rocket for final sub-orbital boost. A fixed geometry air inlet provides improved ram recovery at altitudes below 100,000 feet.

Abstract: A device for controlling the rate of fuel generation in a solid fuel ramjet ngine having a translating tube within the fuel grain and air inlet for continuously changing the distribution of air over the fuel grain in response to air mass flow. The distribution of air effects the aerodynamic shear interaction between the air and solid fuel which causes a change in burn rate.

Abstract: A four-ported dump combustor is designed for use with a ramjet engine and ovides high combustion efficiency and pressure recovery for length-to-diameter (L/D) ratios of between 1.3 and 4.4, over a range of operating conditions.

Abstract: Invention is an aerial vehicle that uses a centrally located aft burning id-propellant motor to supply a fuel-rich exhaust to four cylindrical engines which are mounted in equally spaced relation about the exterior of the vehicle body. The fuel-rich exhaust is mixed with air in the engines and burned to provide ramjet action to propel the vehicle. A tandem booster rocket initially propels the vehicle to supersonic speed. Tail fins are interdigitated with respect to the engines and include sections which are movable upon command for steering the vehicle. Among the advantages for the vehicle are its maneuverability and its adaptability to existing missile systems.

Abstract: This invention relates to a compact hypersonic modular inlet which divides captured airstream and compresses it supersonically without the need for a variable geometry diffuser. According to the invention, an innerbody is provided with a plurality of perimetrically spaced inlet ducts which are defined by a single concave sidewall. The sidewalls intersect to form a center spike and radially directed, swept back leading edges. A cowling covers the inlets and is provided with a swept back leading edge adjacent to each duct, each leading edge having a profile conforming to a normal shock front.