Abstract: A flat sheet metal part is shot peened on both sides with an intensity programmed to vary in a pattern for imparting localized growth matching the part to a spanwise curvature of a contoured aircraft wing. The part is shot peened on one side with an intensity programmed to vary in a pattern for matching the part to a chordwise curvature, and the part takes on the compound curvature of an aircraft wing surface.

Abstract: A multiplicity of abrading discs are individually mounted in an abrading head. The discs are each self-aligning for following the contour of the surface to be abraded. The discs are rotated to abrade the surface and a multiplicity of openings in the head permit debris, generated by the discs, to be removed from the work by a vacuum source attached to the head.

Abstract: A system for providing an optimum lift demand signal for aircraft maneuvers such as "go-around" includes a computer for generating a reference angle of attack signal which is functionally related to the aircraft's vertical velocity. The reference signal is compared with a signal corresponding to the aircraft's actual angle of attack, thereby producing an error signal. The error signal is utilized as a control to the aircraft's dynamics for optimizing the aircraft's climb-out performance.

Abstract: A lightweight cargo container and the fittings for the construction of same are disclosed. One fitting is an extrudable side rail member which connects the container side walls to the bottom wall or floor. Another fitting is a two-part, lightweight, protective corner block which provides attachment points for handling and permits simple replacement of the exposed portion thereof, in the event of damage.

Abstract: A pivotal crank is positioned with respect to the output cam of a torque limiter such that upon torque limiter operation the resulting translation of the cam pivots the crank. Attached to the crank is a flag arm which is normally retained by a spring clip. Pivotal motion of the crank causes disengagement of the flag arm from the spring clip thereby indicating torque limiter operation. The flag arm remains in the disengaged position, despite subsequent absence of limiter operation, until it is manually reset.

Abstract: A filler of polyisobutylene dissolved in a solvent is combined with boron nitride to form a stop-off compound used as a parting agent when diffusion bonding metals. A uniform coating of the compound is applied with screen printing methods prior to bonding.

Abstract: A jet engine having its turbine section and exhaust nozzles particularly arranged to alleviate noise. There is a forward turbine section positioned in a first passageway to receive all or substantially all of the gaseous discharge from the combustion section of the jet engine. There are second and third coannular passageways positioned downstream of the first passageway, with the second passageway being positioned radially inwardly of the third passageway. A second turbine stage is positioned in the second inner passageway to receive a portion of the gaseous flow from the first passageway so as to be driven thereby, with the first portion of gaseous flow being discharged at a relatively low velocity at a radially inward location. A second portion of the gaseous flow passes from the first passageway to the third passageway and is discharged at a relatively high velocity in a generally annular pattern radially outward of the flow of the first portion of the gaseous flow.

Abstract: An anvil having a working end away from a mounting shank, has compressed air flowing through the anvil to feed outward to the working end. An insert fastened to a panel is secured to the panel by forming on one end of the insert and by bonding with an adhesive on the other end. The working end of the anvil presses against the insert during forming and the flowing compressed air blows excess adhesive from the contacted surface of the insert.

Abstract: A tow plate including a retention assembly and a removable clevis assembly made up of a main clevis member and a drogue clevis member engageable with the main clevis member. A first latch mechanism latches the main clevis member to the retention assembly. A second latch mechanism latches the drogue clevis member to the main clevis member. To effect force transfer, the entire clevis assembly is released by unlatching the main clevis member from the retention assembly, with the drogue clevis member latched to the main clevis member. To effect drogue jettison, the drogue clevis member alone is released by unlatching it from the main clevis member, while the main clevis member remains latched to the retention assembly.

Abstract: Clamp means for securing a printed circuit board to a chassis or "cold wall" with improved heat transfer characteristics. The chassis, which acts as a heat sink, is provided with elongated slots which receive the opposite edges of a heat conductive metallic plate sandwiched between insulating printed circuit layers of the printed circuit card. Disposed within each slot is an elongated clamp which, when set, not only forces the heat conductive plate into contact with a first wall of the elongated slot but also exerts a force against, and is in abutting relationship with, a wall normal to the first wall. This maximizes the cross-sectional area of the path through which heat can flow from the heat conductive metallic plate to the chassis, thus improving the heat transfer characteristics.

Abstract: Method and apparatus for reducing jet noise in a turbofan engine by causing internal mixing of fan and primary air to reduce the maximum velocity of gases at the nozzle exit plane by creating a particular type of vortex flow at a distance of at least one nozzle diameter forward of the nozzle exit plane. In one preferred embodiment for a JT8D engine an array of eight roll-top vortex generators are provided on each side of the splitter wall between fan and primary flows, and a tail cone is disposed in the primary exhaust downstream of the vortex generators.

Abstract: A brake system wherein a manually operated foot pedal actuates a metering valve that controls the pressure magnitude of fluid applied to a set of main brake pistons which push stator brake plates against rotating brake plates resulting in wheel braking torque; and further wherein a force balanced piston and a control valve, modulates the fluid pressure applied to the set of main brake pistons in response to wheel braking torque reaction, such that maximum brake torque is limited in direct proportion to the magnitude of pressure metered.

Abstract: An improved lubricant metering valve for use in air line lubricant systems is disclosed. To preclude improper tampering with the system the device is not adjustable. The valve has a center metering pin which is permitted to undergo limited movement within the valve body to prevent clogging.

Abstract: A floor mounted rotatable arm assembly which supports a removable parachute holder. A release mechanism operates the parachute holder to release a parachute after the arm assembly has been rotated from a stowed position faired with the floor of the aircraft cargo space, wherein the parachute is face-up, to a deployed position aft thereof, wherein the parachute is face-down and available for release.

Abstract: A method and apparatus for selectively generating a noise suppressing hot gas shield are described. A portion of the jet engine exhaust flow is selectively directed to a nozzle which at least partially surrounds the circumference of the jet engine exhaust. Prior to exiting the nozzle the flow is passed through a pressure, and therefore density, loss producing device to provide a shield flow of optimum noise suppression properties.

Abstract: A duct seal including a supporting assembly adapted to support a duct extending through an opening in a partition and a mounting assembly mountable by the partition for guiding and retaining the supporting assembly. The seal maintains a seal against overpressure while permitting the duct to shift bi-directionally lengthwise and about its axis rotatively and orbitally. The seal is particularly useful as an aircraft firewall duct seal.

Abstract: A quick-change drill chuck adapted for positioning ball elements within a groove circumferentially disposed about the central axis of the adapter portion of the tool. Three ball elements when pressed radially into the groove prevent longitudinal movement of the adapter, the ball elements being forced toward the adapter portion of the tool by a ramp portion formed as an integral part of the inner circumferential surface of the chuck collar member.

Abstract: There is disclosed a cable control system which utilizes servo-regulation to maintain the desired cable tension. The system regulates cable tension, is self-rigging and is capable of sensing control cable failure to prevent runaway regulation.

Abstract: High voltage transients, such as from lightning strikes, on an AC carrying power line are suppressed by unique protection circuitry. Voltage on the line is sensed and should it exceed a predetermined reference level an appropriate one of two silicon controlled rectifiers is activated. The rectifiers are connected in series with a voltage dependant resistor and the resultant network is coupled between the terminals of the power line. The network is effectively an open circuit under exposure to the periodic waveform normally existing on the power line. Upon occurrence of a high voltage transient, the combination of one of the rectifiers and the voltage dependant resistor switches to a low impedance state, thereby accomplishing suppression.