Abstract: A window for a subsonic passenger aircraft that provide maximum optical visibility while minimizing the amount of exterior acoustic noise transmitted through the windows to the passenger cabin during flight of the aircraft includes at least one substantially transparent window pane having the shape of an ellipse. The ellipse has a major axis and a minor axis, and the major axis is about twice as long as the minor axis and is disposed generally perpendicular to the direction of flight of the aircraft. In one exemplary embodiment, the window has a height of about 20 inches and a transparent area of about 141 square inches, and includes a pair of substantially similar window panes disposed in a parallel, spaced-apart relationship circumscribed by a mounting bezel. A plurality of the windows are each mounted with the bezels in spaced-apart rows in each of the opposite sidewalls of the aircraft fuselage.

Abstract: Heat exchanger systems and associated systems and methods for cooling aircraft starters/generators are disclosed. A system in accordance with one embodiment includes a first fluid flow path for a first fluid, a second fluid flow path for a second fluid, and a third fluid flow path for a third fluid. The first and second flow paths are positioned proximate to the third flow path to transfer heat between the third fluid and both the first and second fluids. The third flow path is configured to allow a transfer of heat between the second and third fluids at a first transfer rate when the first fluid carries heat at a first rate, and at a second transfer rate different than the first transfer rate when the first fluid does not carry heat, or carries heat at a second rate less than the first rate. Accordingly, when the heat to be rejected by one fluid is decreased, the heat transfer rate for the remaining fluid can be increased.

Abstract: An adapter for attaching accessories to a weapon and methods for mounting the adapter are disclosed. The adapter includes a connector for coupling with a rail on the weapon, wherein the connector includes connecting surfaces that are constructed to couple with corresponding contact surfaces on an accessory. The adapter further has a block projecting downward from the connector arranged between the connecting surfaces, wherein the block can engage a portion of the associated with the accessory.

Abstract: An accessory mounting device for use with firearms is disclosed. The mounting device includes a first pin having a first head and a second pin having a second head, wherein the second head projects radially beyond the second pin only on one side of the second pin. The device further includes first and second apertures to receive the first and second pins, respectively, and a first undercut associated with the first aperture, wherein the first undercut is compatible with the first head and a second undercut associated with the second aperture, wherein the second undercut is compatible with the second head. Also included is a spring-loaded locking device attached to the second pin and a handle associated with the spring-loaded locking device. The handle moves the second pin against the force of the spring axially in the direction of the second head so that when the second pin is turned by the handle, the second head pushes against the force of the spring on the second undercut.

Abstract: The present invention relates to a gun trigger for use with a bolt-action gun. The trigger of the present invention has a finger element with an extension and a catch. The catch has a front strap and a rear strap. One or more openings are between the front and rear straps. One or more braces can be across the one or more openings. The trigger also has a head. A socket is formed in the top of the head, and a ball is received within the socket. The height of the ball relative the bottom of the socket can be adjusted. There is practically no friction between the trigger and a sear. The trigger of the present invention may be made by remanufacturing existing conventional triggers.

Abstract: An apparatus for changing the angle of attack of a cavitator on a supercavitating underwater research model. The apparatus has a nose assembly that has a pivotable cavitator tilt plate, an actuator member and a drive system engaged with the actuator member to drive the actuator member so as to tilt the cavitator tilt plate to a desired angle. Power components are remotely located and accessible to an operator so as to enable an operator to vary the angle of the cavitator tilt plate while the supercavitating underwater research model is underwater and in motion.

Abstract: A telescoping stock for a firearm, the stock including a stock body having an upper mounting rail, a buffer tube holder for receiving a firearm buffer tube, the buffer tube holder having a complementary mounting rail, and locking means for selectably locking the buffer tube holder in any one of a plurality of positions relative to the stock body. Preferably, the telescoping stock also includes a telescoping cheek rest.

Abstract: A pellet for at least one of a compressed gas and spring operated weapon includes a forward head portion and a cylindrical rearward tail portion which is disposed about a common centerline with the head portion and which has an air pocket formed therein. A frustoconical middle portion connects the tail portion to the head portion. The pellet design is adaptable for use with various commonly available caliber weapons.

Abstract: A firearm comprises an upper receiver body and a lower receiver assembly. The upper receiver body is configured for receiving belt-fed ammunition and the lower receiver assembly is attached to the upper receiver body. The lower receiver assembly includes a receiver body having an accessory mounting structure, a trigger group mounting structure, one of an integrally-formed, non-detachable butt-stock mounting structure and an integrally-formed, non-detachable butt-stock, and one of a hand grip mounting structure and an integrally-formed, non-detachable hand grip.

Abstract: Methods and apparatus for a fluid inlet according to various aspects of the present invention comprise a housing and a ramp at least partially within the housing. The housing and the ramp define a passage through which air may flow to the engine and a cavity on the opposite side of the ramp from the passage. The ramp is moveable within the housing to change the size of the passage and the cavity. The system further comprises a seal substantially disposed across the cavity.

Abstract: An apparatus and a system for a stabilization device are disclosed herein.

Abstract: Paintball or non-lethal gun or marker apparatuses are disclosed to prevent projectiles from being inadvertently discharged from a paintball or other non-lethal gun or markers.

Abstract: A training mortar apparatus includes a small mortar tube and a large mortar tube, the small mortar tube being disposed in the large mortar tube; a removable base cap attached to one end of the small mortar tube; a plug inserted in the removable base cap; a removable firing pin inserted in the plug; a second base cap attached to one end of the large mortar tube; and at least one opening in the large mortar tube, the opening being axially aligned with the removable firing pin of the small mortar tube. Improved manufacturing methods are also disclosed.

Abstract: Apparatus for aerial refuelling comprises a frame 2 for attaching around an aperture in an aircraft floor 3, and a movable hose drum housing 4 pivotally mounted on the frame. The hose drum 12 may be stowed within the aircraft, and moved into the aperture, for example using screw jacks 20, for deployment of the drogue 40. Since the hose is deployed from a position nearer the outside of the aircraft, the hose does not scrape the edge of the aperture even when lying at a shallow angle to the aircraft.

Abstract: Mounting device for an accessory (11), such as a lamp (27) for guns. Said accessory (11) is connected to an adapter (10) which is provided with a gripping means (17; 22). Said gripping means (17, 22) comprises a spring biased clamping mechanism (15; 18; 20; 22; 24) and a counter stay (17) cooperating with said clamping mechanism.

Abstract: A system is disclosed for pre-positioning a canister assembly at an undersea location. A transporter deploys to and releases the assembly proximate to the desired location. Once the assembly has fallen a safe distance after release, spring bands of the assembly are released by the action of lanyards of the transporter. The release allows anchor plates on each end of the assembly to separate from the assembly thereby dragging the assembly to a seafloor with the assembly buoyant at the undersea location. A vehicle deployment from the assembly is actuated by an acoustic receiver that causes a release device to release a normally compressed spring thereby allowing the spring to expand. During expansion, water is drawn into the assembly through flow ports to force a plunger plate with the water to act on a vehicle to deploy the vehicle out of a deployment tube of the assembly.

Abstract: A three-in-one high-pressure gas cylinder magazine. A high-pressure gas cylinder is installed within a holding cavity, and held firmly using a fine tuning knob and securing cover. A spring mount and a securing seat are disposed within a pellet guide cavity defined parallel to the holding cavity. When the pellets are decreasing, the inner securing seat upwardly pushes the pellets within the pellet guide cavity and secures them within a securing ring in a ready state for propelling out a model pistol. When a gastight valve within a cylinder is full of gas, then an inner piston rod is put in a pneumatic state, and the cylinder and a slide cover are simultaneously driven backward as soon as the piston rod is driven by the gas, thereby fixing a hammer in a rear position, thus achieving simplification, automatic operating functionality, and succeeding in simulating a real pistol.

Abstract: A rifle scope has a body with a number of optical elements. An adjustment knob is rotated we connected to the body and interacts with at least one of the optical elements to provide an image shift in response to rotation of the knob. A detent mechanism interacts with the knob, and has a number of detent positions. Many of the detent positions have a first detent force, and a selected subset the detent positions have a greater second force. The selected subset of detent positions may correspond to selected major distance intervals.

Abstract: A baffle for use in a firearm suppressor, which increases the amount of sound and flash that are perceived upon the firing of a firearm upon which a suppressor is placed without substantial alteration to the power or accuracy of the firearm upon which the suppressor is attached. The baffle is made up of a generally hollow, central core defining open topped tube that is dimensioned so as to allow passage of a projectile through this core. This tube extends from an open front end backwards to an intersection with an inside surface of a rear wall, as well as to an intersection with a forward bulkhead. The bulkhead and the inside surface of the rear wall are located in different vertical and horizontal planes and define expansion chambers and reflection surfaces that alter the escape pattern of gasses out of the suppressor.

Abstract: For use in estimating or predicting bioaccumulation of a chemical analyte, even a surfactant, log Pow values for the analyte may be determined by calculating the log of the ratio of the concentrations of the analyte in n-octanol and in water, equilibrated using a slow-stir method. In this method, samples of the analyte are prepared and stirred in n-octanol and water (or other largely immiscible solvents) at a rate sufficiently low to avoid emulsions over time at a constant temperature. After stirring, the n-octanol layer and the water layer are sampled and the quantity of analyte in each measured.