Abstract: An air cooling system having a rotary assembly within a non-circular chamber wherein compression and expansion used in a modified reverse Brayton cycle are provided within the same chamber by the change in volume brought about by vanes sliding within slots in the rotor. Air is supplied to the compressor portion of the chamber from an air-to-air heat exchanger which receives cooled air from the expander. A transfer passage is provided between the output of the compressor and the inlet of the expander. A liquid cooled heat exchanger is provided adjacent the compressor. A second liquid cooled heat exchanger is provided around the transfer passage. Coolant is supplied to the liquid cooled heat exchangers from a radiator.

Abstract: A gas cycle cooling system having a rotary compressor and expander driven by a common shaft wherein the compression and expansion of a modified reverse Brayton cycle is provided within a closed chamber by changes in volume brought about by vanes sliding within slots in a rotor. The rotor is positioned within the chamber to provide spaces between the rotor and the chamber wall which act as effective gas transfer passages between the compressor and the expander. Liquid from a first heat exchanger is circulated through the wall of the rotor housing adjacent the compressor portion of the chamber to remove heat during the compressor phase of the cycle. Liquid is circulated through the wall of the rotor housing adjacent the expander portion of the chamber to provide cooling for a second heat exchanger.

Abstract: An air conditioning system for vehicles having a reverse Brayton cycle cooling system with a turbine drive for the rotor in the reverse Brayton cycle cooling system. A binary working fluid is used in the air conditioning system with air used in the reverse Brayton cycle cooling system. Waste heat is used to provide superheated water vapor for driving the turbine with the turbine return supplied to the air flow at the outlet of the compressor of the cooling system. The combined working fluid is supplied to a heat rejection heat exchanger where the excess water vapor is condensed and returned to the waste heat recovery system.

Abstract: A quadrant detection system having an objective lens and a holographic lens positioned at the back focal plane of the objective lens. Four photoelectric detectors are positioned on the side of the holographic lens remote from the objective lens. The holographic lens has lens elements in four quadrants with each quadrant having a focal point corresponding to the position of the photoelectric detectors.

Abstract: Boundary layer transition is delayed on a re-entry vehicle by making use of the differential pressure that normally exists between the surface of a re-entry vehicle and the base region of the vehicle. Choked flow orifices are provided on the surface of the vehicle at the input to the internal ducting leading to the base region of the vehicle.

Abstract: A propulsion system having an afterburning turbojet with the fuel supplied at the inlet to the turbojet compressor. The turbojet combustor has a bypass with a flow control connected at the inlets to the combustor and the bypass to control the amount of fuel-air mixture from the compressor that enters the combustor.

Abstract: A reverse Brayton cycle rotary vane cooling system having a compressor and an expander driven by a common shaft. The cooling system includes a plurality of vanes made of a carbon epoxy plastic composite with bearing support inserts molded into the plastic composite. A bolt passes through the bearing support inserts and plastic composite. Oil is supplied to the vane slots with any oil passing into the cooling gas being removed by oil separators.

Abstract: A holographic field lens detector system having an objective lens for focusing incoming light from a distant illuminating source upon a holographic lens positioned at the back focal plane of the objective lens. The aperture of the objective lens is simultaneously imaged on four detectors positioned in back of the holographic lens and on the four sides of holographic lens. The output of opposite pairs of detectors are fed to sum and difference circuits with the output of the sum and difference circuits being supplied to divide circuits to provide X and Y position information for the illumination on the holographic lens.

Abstract: A three layer laminated plastic cushioning material having a substantially flat central layer with sealed air pockets formed on both sides of the central layer between the central layer and layers positioned on opposite sides of the central layer.

Abstract: A system for inducing turns in ram air canopy parachutes having a plurality of openings in the upper surface layer of the parachute canopy with the openings being equally distributed on opposite sides of the parachute centerline. Flaps are provided on the under side of the upper surface layer to close the openings. Control lines are attached to the flaps for selectively opening the flaps on one or the other side of the centerline to allow ram air to flow through the openings. This reduces lift and increases drag on one side of the ram air canopy parachute to induce a turn.

Abstract: An intermittent burning ramjet engine having a rough wall combustor with fuel supplied to a fuel injector upstream of the combustor. The fuel is cyclically ignited at a predetermined frequency. A resonator tuned to a frequency less than one-tenth of the combustor frequency is positioned between the combustor and the ramjet inlet.

Abstract: A variable area turbine vane, for use in high temperature aircraft gas turbines, having a load carrying spar with a heat shield member surrounding the load carrying member. The heat shield member is positioned in grooves which permit spanwise and cordwise expansion of the heat shield member. Cooling air enters the hollow load bearing member and passes through holes in the load bearing member and heat shield member.

Abstract: A system for measuring head and neck impact forces, having a movable plate member with an anthropometric dummy head and neck member secured to the plate member. Three force measuring cells are positioned in a horizontal plane and are connected between the movable plate member and three column members. Three vertical force measuring cells are positioned between a support plate and the movable plate member. High frequency response triaxial accelerometers are mounted at the center of gravity of the dummy head and neck member and on the movable plate member adjacent the attachmment of the dummy head and neck member.

Abstract: A hydraulic drill unit for drilling multimaterial, thick layer stock having a conventional hydraulic drill modified to have its feed controlled by a servo valve and its spindle speed controlled by a servo valve. A linear encoder is attached to the drill to provide an indication of drill position. The linear encoded provides 20,000 forward and reverse pulses per inch, depending upon the direction of travel, which are used to determine net feed rate. The net feed rate signal is compared with a command feed rate to control the feed servo valve. A magnetic pickup is used to provide a pulse signal proportional to RPM. This signal is compared with a command speed signal to control the spindle speed servo valve. Differential pressure transducers are used to measure pressure across the hydraulic feed pistion and the hydraulic drill motor to provide signals which can be used as indications of chip packing or a dull drill.

Abstract: An adjustable clamp for a missile launcher system having a pair of semi-resilient wedge members which fit between the missile hanger lugs and launcher rail and are drawn into the gap by means of a pair of plate members and a pair of bolts. The Teflon wedges fill the gap between the missile hanger lugs and the launcher rail and reduce vibration during captive flight and protect the rails against damage.

Abstract: A sabot, having four quadrant sections, for use in testing of impact damage of metal fragment-type products. The quadrant sections include molded alignment guides and a depression which forms a central cavity for holding payloads. Recesses are provided in the quarter sections to reduce weight. An external gas plug flare is provided on the external surface of the sabot. The sabot has a conical recess at the forward end with a hole into the interior of the sabot to enhance separation of the quadrant sections after the sabot has left the gun barrel.

Abstract: An attenuator, for use in a fluid system for reducing pulsations and transients, having a vortex chamber with a plurality of tangential inlets and one or more outlets with converging nozzles being provided in the inlets to increase the inlet flow velocity and to provide diode action. At least one elbow is provided in the outlet line adjacent the vortex chamber outlet with a second elbow being provided at a distance from the elbow adjacent the vortex outlet, approximately equal to the radius of the vortex chamber. The second elbow is not needed when outlet line discharges to a sump or to the atmosphere.

Abstract: A method and apparatus for use in the extrusion of billets having a powder filled container with the nose cap having a shaped projection extending into the container and the tail cap having a concave portion substantially corresponding to the shape of the nose cap. A filler tube for the container is provided in the tail cap.

Abstract: A system for protecting aircraft tires and axle bearings from excessive heat developed in the braking system, having a plurality of osmotic heat transfer devices having the cooling fluid pumped from the cold end, which is cooled by radiation fins, to the hot end, within the brake disk locking keys, by osmotic pumping across a membrane. The working fluid can use water as the solvent and the solute is one of the chlorides of sodium or potassium or one of the chlorates of cessium, sodium or calcium.

Abstract: A system for reducing the ground impact of a load in a parachute air drop system having the parachute canopy attached to a first platform and the load attached to a second platform. The first platform and second platform are connected together by a plurality of elastic cords. The elastic cords are held in a relaxed state by a steel cable connected between the platforms. A ground probe supported on a line a predetermined distance below the cargo load has switch contacts which close when the probe reaches the ground to operate a cable cutter. The cable cutter cuts the steel cable connected between the platforms to permit the cargo to free fall under the restraint of the elastic cords. The partially unloaded canopy and the air mass inertia under the canopy is used to slow the cargo load velocity just prior to touch down.