Abstract: A double segmented airplane flap with the main flap movable by a four-bar linkage and the aft flap programmed with a linkage pivotally mounted to wing support structure. The two flap segments are pivotally joined. Linkage programming the aft flap segment is located and sized so that the two flap segments remain in the same relative position as to each other throughout main flap translation, but the aft flap segment may be rotated in either direction at any position by an actuating device.

Abstract: A racket and method of making same structured with a wide throat spanned with a structural member and the racket having a multi-thickness honeycomb core joined together with and encased in reinforced plastic. A plastic strip with a plurality of integral grommets inserted in the head of the racket has a reduced area between grommets.

Abstract: A take-off and landing control device for automatic retraction of flaps upon stowing landing gear and upon attaining a predetermined airspeed and of indicating distance from brake release during take-off, and for an automatic decelerating approach with flaps extending as a function of distance from touchdown with automatic throttle cutback and automatic stabilizer trim in response to flap location maintaining an essentially constant angle of attack.

Abstract: A water ski binding having a heel piece binding with a flexible heel boot held in place with an adjustable heel member. The heel member is U-shaped and has an elongated slot in each leg. The upper part of the slot extends outward to form a shoulder and an insert having a pair of slots fills the elongated slot to permit custom fit of the heel piece.The shoulder formed in the elongated slot varies in width to form a series of recesses each of which will accept an extension of a fastener to positively lock the fastener in place when the heel binder is used as an adjustable member. A front piece binding with a flexible foot restraining boot is rigidly held in place with a shaped member. The shaped member is fastened around the periphery with a series of recessed holes shaped to accept a nut recessed below the outer surface of the rigid member.

Abstract: A three-dimensional composite structure with integral reinforcing ribs. The ribs have a core to include spaced metal inserts that are positioned to accept load bearing fasteners. A lightweight reinforcing material fills the remainder of the core. An adhesive tape with continuous filament composite fibers encircle the rib. The ribs are positioned between an inner and outer shell of structurally reinforced plastic and wound circumferentially and laterally with continuous filament composite tape.

Abstract: A pair of members, one of which has a multiplicity of projections extending therefrom in a uniform geometric pattern with the projections aligned bi-directionally at 90.degree., and the other member has a multiplicity of recesses arranged to mate with the projections to allow bi-directional adjustment and also locking when the members are fastened together.

Abstract: A housing to fit over a drill contains a pair of sleeves with facing inclined surfaces that approach each other to force a washer located between the surfaces into an inclined position to lock onto the drill. A spring located on each side of the washer extends to the adjacent sleeve.

Abstract: An apparatus and method of electromagnetically pulling dents from conductive material. A coil is formed to direct an effective electromagnetic coupling to a limited area between the coil and a dented part. A nonconductive mold placed between the coil and part has openings to overlie the dent. The coil is first energized with a slowly rising current then is energized with a fast pulsing countercurrent to generate a strong pulling electromagnetic coupling.

Abstract: A process for seating a lockbolt with a positioned collar, swaging the collar onto the seated lockbolt and breaking off the pintail all in one operation. A single source of hydraulic power pulls a nose piece with gripper jaws to seat the lockbolt and to break off the pintail, and to move an anvil in the opposite direction to swage a collar onto the seated lockbolt. A combination air and hydraulic system sequences these steps.

Abstract: A puck to contact an acoustic panel has open-ended compartments to flow air through then back through the face sheet of an acoustic panel while measuring the air pressure difference across the face sheet.

Abstract: A pair of matched metal dies one of which moves against the other to form a mold to contain, and to apply pressure to a part and to pinch off excess material on the part. The lower die has a recess with all the sides of the recess canted outward in two steps. The upper die when inserted contacts the lower canted sides of the lower die.

Abstract: A double segmented airplane flap with the main flap movable by a four-bar linkage and the aft flap programmed with a linkage pivotally mounted to wing support structure. The linkage programming the aft flap segment extends from the wing support structure to an actuating axis point to convert downward movement of the link into rearward movement of a control linkage to control relative movement of the aft segment of the flap.

Abstract: A lightweight collapsible boom assembly is disclosed. It is particularly suitable for use with a multipurpose vehicle of the type used in emergency rescue operations because it can be stored in a limited space within the vehicle and quickly removed and installed for lifting heavy objects with a winch and cable. Connecting means pivotally attach a pair of upper members to an upright member in an aligned parallel relationship for storage, and guide movement of the members into a spread apart relationship for reacting cable loads when the upper members are installed on the vehicle. The disclosed preferred embodiment utilizes an adjustable length upright member attached to a lower strut secured to the vehicle. A support device, optionally either a shoe or wheel, reacts vertical loads from the upright member and the lower strut.

Abstract: A three-dimensional composite structure with integral reinforcing ribs. The ribs have a core to include spaced metal inserts that are positioned to accept load bearing fasteners. A lightweight reinforcing material fills the remainder of the core. An adhesive tape with continuous filament composite fibers encircle the rib. The ribs are positioned between an inner and outer shell of structurally reinforced plastic and wound circumferentially and laterally with continuous filament composite tape.

Abstract: An ultrasonic scanner positions a transducer with respect to a fastener hole, with an installed fastener, to adjustably control transducer direction and location and to maintain transducer contact while scanning the hole. The scanner synchronizes transducer location during scanning cycle and transmits ultrasonic echoes from the transducer into a storage display monitor to detect flaws.

Abstract: A windshield wiper imparting hydrophobic properties to a surface over which it moves is prepared from a polymerized silicone elastomer having about 3 to 20 parts per hundred of a dispersed filler selected from silica, mica, molybdenum disulfide, and tetra fluoro ethylene, and about 0.2 to 10 parts per hundred of an additive of dicoco dimethyl ammoniumchloride or an acetate salt of a copolymer with the formula ##EQU1## and X has a total value of from 10 to 400 inclusive. Also disclosed is a method of imparting repellency to a windshield by immersing a wiper in an alcohol solution containing about 50 weight percent of the acetate salt of the copolymer named above.

Abstract: A mixed potential measurement utilizing a strip chart recording voltmeter coupled between the metal and its oxide immersed in the sealing solution is determinative of percent hydration of the part in situ during the sealing process.

Abstract: A cutter assembly wherein material to be cut passes underneath a cutter bar, a track extending under the cutter bar holds a moveable carriage, a rotatable cutter wheel mounts to the carriage, with a side against the face of the cutter bar, a releasable gripper bar holds the material against the underside of the cutter bar during the cutting cycle, cords attached to the slideable carriage are used to pull the carriage along the track, and means are provided to attach the assembly to a support. A cutter as above mounted in a frame, and having an electric drive motor with controls for moving the carriage, and a cutter as above which is moved by a handle attached to the carriage are also disclosed.