Abstract: A blade control method and means for helicopter rotors which increases heopter speed by mixing two/rev. control motion with one/rev. cyclic and collective motion through mechanical summation is provided. Both rotary and vertical motions are imparted to an inner control shaft and these motions are combined to impart vertical oscillatory motions to the rotor head which motions increase the thrust developed by the helicopter rotor.

Abstract: A device for generating an air jet without the use of moving parts is proed. High voltage is used to create a corona discharge electric wind in a ducted, compact, portable generator that can be used for augmentation cooling applications where high voltage is available.

Abstract: A means for interfacing between low pressure, low flow fluidic circuits and he high pressure, high flow input requirements of fluidic digital thrusters to control the roll, pitch or yaw rate of missiles is provided. Input pressures from the fluidic circuitry cause a fluidic digital amplifier to go to one of its two stable states. The output from the digital amplifier operates one piston in the interface means, causing it to close off a digital thruster control port. The same output is ported to the opposite side of the other interface means piston, causing it to unblock the other digital thruster control port. Blocking of the first control port causes the digital thruster to switch to either a left or right output leg to initiate a corrective thrust. The pistons are interlocked so that only one piston can be extended to cover a given control port at any time.

Abstract: A process for producing a bond at the interface between an encapsulant and he object to be encapsulated is provided. A selected resin with curing agent is coated and oven cured on the object to be encapsulated and thereafter a copolymer coating is applied to the assembly in a fluidized bed and the assembly is oven cured. The resulting product is then injection molded with a suitable polyethylene material.

Abstract: A CO.sub.2 -powered system for cooling garments by conduction cooling when he wearer is subjected to heat stress is provided. A dry ice refrigerant source provides the cooling and the CO.sub.2 gas given off during sublimation of the dry ice provides the motive power for a diaphragm type pump which transports heat transfer liquid between the heat source and the refrigerant or heat sink. The system may be interfaced with brine type cooling systems used for food preservation to maintain food temperatures under emergency conditions such as power outages due to its non-electrical energy source.

Abstract: A method of and means for introducing a heated liquid into a cold liquid the purpose of improving the pumping rate of the cold viscous liquid is provided. The heated liquid is directed upward into the suction inlet of the cold liquid pump through an orifice or a multiplicity of small orifices which are disposed a selected distance below the suction inlet.

Abstract: An optical homodyne microscope is disclosed which detects phase modulation of the optical radiation that is reflected from an object under study which is in a state of periodic motion. The dimensions of the object may be smaller than the optical wavelength with this technique. By analyzing the resultant phase modulation spectrum, information concerning the shape of the object can be obtained.

Abstract: A picosecond pulse generator for producing pulses having widths in the or of 10.sup.-12 seconds utilizes a Josephson junction that has an external load resistor connected in shunt therewith by a balanced transmission line. The Josephson junction is driven by a high frequency oscillator, and the AC current, I.sub.1, flowing through it is adapted to have its amplitude varied with respect to I.sub.c, the critical current of the junction. As the value of I.sub.1 /I.sub.c exceeds one and increases, first a single and then an increasing number of picosecond pulses are produced during each half cycle of the high frequency oscillator.

Abstract: An offset or asymmetrical self-contained liquid metal current collector for cyclic or homopolar electrical generators or motors is provided which includes a narrow annular volume on one side and a wide annular volume on the other side of the collector disc. Selectively positioned circular troughs effectively communicate with each other so that the liquid metal is trapped and retained when the rotating speed of the disc is too low to centrifugally maintain the liquid metal at the outer periphery of the disc.

Abstract: Radar wave energy entering aircraft engine cavities is substantially disped by providing within such cavities surfaces having perturbations or dipoles which interact with the electromagnetic energy within the cavity interior, causing the reflected energy to be defocused or scattered over a broad range of angles thereby substantially lowering the radar cross section of the cavities.

Abstract: A simply constructed low input power cyclic cryogenic refrigerator suitable or cooling superconducting quantum interfering devices (SQUID) and similar instruments is provided. A Stirling machine having a multistage displacer and a piston as its only essential moving parts, with helium gas as the working fluid, achieves and maintains a temperature of substantially 8.5.degree. K. The working cylinder and displacer are separated by a tube and are fitted together precisely at steady-state operation rather than at room temperature. The displacer preferably is made of nylon and its cylinder of an epoxy-glass composite to provide the nearly optimum clearance required to maintain the 8.5.degree. K. temperature for continuous periods on the order of several weeks.

Abstract: The disclosure concerns a means for cooling the leading edges and trailing dges of turbine blades by cross-stream injection. Cooling is achieved by ejecting coolant from holes opposite either the leading or trailing edges of the blades, or both, with coolant distributed by the jet mixture on the leading edge and by recirculation in the dead air region on the trailing edge.

Abstract: A dual-position nozzle having a stationary outer support structure or thr holder and an inner sustain throat assembly which translates during boost-sustain transition is provided. The throat holder includes inner and outer metal support rings joined by three tubular struts. During boost operation, the sustain nozzle assembly is mechanically joined to the throat holder by a split beveled retaining ring which is engaged in a groove in the inner metal ring of the throat holder. Upon command, expanding gases act to withdraw a pin from a gap in the retaining ring permitting the sustain nozzle to translate under viscous and pressure forces to the sustain phase position.

Abstract: An easily maintainable interface for magnet dewars which includes a low h leakage disconnect fitting that retains the vacuum integrity of both the dewar and the transfer line is provided. The fitting includes a bayonet-type insert having separate coils disposed about a central conduit for cooling or heating the unit depending upon intended use. Liquid helium is introduced axially through the bayonet which is adjustable to a purge position wherein either gaseous or liquid helium may be introduced to clean, heat or cool the unit, or a flow position wherein liquid helium is passed through the bayonet into the supply line.

Abstract: A radiation suppressor for exhaust turbine or other engines which signifitly reduces the lock-on range of infrared seeking missiles is provided. Engine exhaust gases are the sole power source for driving an exhaust turbine which includes a self-contained turbo-fan assembly and a surrounding plenum-shroud assembly both of which are structurally supported by the aircraft or other vehicle-cooling air duct assembly. The turbo-fan assembly comprises a turbine wheel having a top or outer fan for providing both hot metal and plume cooling air and a central centrifugal blower to partially cool the hollow turbine blades. The duct assembly is combined with ambient air passages to distribute plume cooling air, while a plenum-shroud assembly which surrounds these assemblies includes internally cooled radial vanes disposed in a turbine shroud as well as an outer fairing having flow passages for cooling air.

Abstract: A device for rapidly decelerating a high velocity projectile in a liquid ium, e.g. water, while preventing both excessive high inertial loading of sensitive projectile components and high impact loading of the device itself is provided. A plurality of deployment panels are released at a selected depth and initially opened by leaf springs and thereafter by water flow. Acceleration of the panels is controlled by a piston actuated by the panels which displaces water in a chamber in the drogue body through a suitable orifice.

Abstract: A gas/liquid separator for separating entrained gases such as air from lid such as oil in hydraulic systems under extreme flight conditions is provided. High density liquid substantially devoid of gas bubbles is forced toward the perimeter of a liquid chamber through centrifugal force by imparting rotational velocity to incoming liquid, causing low density air-entrained liquid and large gas bubbles to collect in the center of the chamber. The high density liquid is discharged from an upper slot in the chamber while liquid with entrained gas bubbles is urged centrally upward into a second chamber where further separation occurs. Gas-free liquid from the upper chamber is collected and discharged centrally within opposed outlets communicating with the slot to provide a pumping action which augments liquid flow into and out of the upper chamber. Gas is bled from the upper chamber.

Abstract: An oleo strut oil level indicator is provided which includes a rod slidably xtending through a landing gear or other metering pin contacting the strut floating piston at one end and terminating at a frangible disc at the opposite end. Excessive oil loss in the strut produces a commensurate displacement of the floating piston toward the frangible disc, causing the opposite rod end to rupture the disc at a selected piston position and exposing a colored low oil level indicator to view thereby visually indicating a condition of potential danger.

Abstract: A non-metallic, high strength, high temperature resistant external or internal strengthening for fiber optics cables is provided. The strengthening may be in various forms such as internally deployed filaments, outer woven mesh fibers, segmented cylinders, helical wrap ribbon, etc., and is made from single high-strength crystal fibers preferably of sapphire, i.e. .alpha.-Al.sub.2 O.sub.3. The non-conductive strengthening crystals have a low density, are highly crush resistant and meet severe environmental fiber optic sensor and data transmission requirements.

Abstract: A transport system for fragile instruments such as the motion sensors used n aircraft flight controls which are very susceptible to damage during handling, shipment and installation is provided. Individual sensors are mounted on a plate that is suspended inside the permanent housing of the equipment by springs which act as shock-vibration insulators. The housing is spring-isolated in an outer casing for transport, and the plate is permanently secured to the housing at the installation site simply by tightening bolts which extend through the housing.