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 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: 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: 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: The invention is an overhead stowage bin mechanism particularly adapted for use in passenger airplanes. In the preferred embodiment, each end of the bin is supported by a pair of pivoted arms of unequal length so proportioned that the bin moves from its stowed position downward and slightly forward, at the same time tilting slightly for ease of access. The arms interengage in the down position to increase rigidity. A spring cartridge is connected to each of the upper arms to counterbalance the weight of the bin, and also is arranged to hold the bin in the down position. The upper arms are interconnected by a torque tube, and a snubbing device is also included in the mechanism.

Abstract: A lightweight cargo container and fitting for the construction thereof are disclosed. The fitting has a simple cross-sectional shape so that it may be inexpensively manufactured of lightweight materials, yet it provides an easily assembled, secure connection between wall panels of a lightweight container.

Abstract: A method of installing a compressible insert in an exterior surface of a body is disclosed. There is also disclosed a laminar flow control arrangement that may be produced by such method.

Abstract: There is disclosed a simplified, lightweight, easily stowed thrust control device for the hot core exhaust flow of a jet engine. The device is mounted in the engine strut fairing, downstream of the nozzle exit plane to reduce exposure to the high exhaust temperatures. In a blocking position, the mounting hardware, actuator and actuator linkage is located so as to be cooled by both free stream and fan air, providing a longer operating life, less maintenance and more reliable operation. Simplified construction and mounting arrangement permit the device to be readily retrofitted on existing installations.

Abstract: An intermodal cargo container capable of being quickly and easily converted between a solid storage mode and a fluent storage mode is disclosed. Shell sections adapted to be either removed from, or pivoted within, an outer container are provided to support an impermeable liner in the fluent storage mode. Elements of both the inner and outer container may be of conventional construction for surface transport or of lightweight construction suitable for air as well as surface transport.

Abstract: Apparatus for internally mixing fan exhaust with primary exhaust forward of the nozzle exit plane of a turbofan engine having an outer engine cowling, a splitter wall structure and a tail plug disposed in mid engine upstream of the nozzle exit plane is provided by a plurality of struts disposed radially between the engine tail plug and the outer engine cowling upstream of the nozzle exit plane and a plurality of vortex generating means disposed on the struts for generating vorticies across the entire engine exhaust area.

Abstract: An aircraft thrust reverser having a plurality of doors rotatably secured to linkage members at each door's center, and rotatably secured to a carriage ring at one end. As the carriage ring moves toward the direction of travel of the aircraft, the linkage members cause the doors to extend in a forward slope, intercepting fan air and directing it outward and forward.

Abstract: An apparatus and method for modifying a jet engine to be carried externally in an inoperative condition on an aircraft to minimize aerodynamic drag and oscillation of the engine. The apparatus includes an annular inlet extension adapted to be mounted to the operating air inlet which slightly extends and contracts the inlet to reduce air spillage. The disclosed method includes the removal of the fan blades from the fan section of the inlet, attaching an ice deflector dome to the engine core inlet, and attaching the inlet extension to the nacelle air inlet.

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 portion of the fan air may be introduced into the central portion or core of the hot primary air.