48 results about "External ballistics" patented technology

A method for geometrically enhancing of the flight of a projectile fired from a weapon to an intended target, including development of a flat annular face on the outermost end of the ogive portion of the projectile, such flat annular face being oriented in a plane that is substantially perpendicular to, and concentric with, the longitudinal centerline of the projectile, and further including extraction of extraneous material from the meplat cavity of the projectile while establishing at least a void volume within the meplat cavity which is substantially concentric with the longitudinal centerline of the projectile and of substantially uniform size and geometry from projectile to projectile. Geometric alteration of the wall thickness of the flat annular face also may be provided. An enhanced projectile and a round of ammunition are disclosed.

Improvements to projectile devices (particularly air guns) include techniques for measuring and controlling the velocity of projectiles in the barrel and after leaving the barrel, allowing the use of non-toxic projectiles. Tracking of a projectile's flight by its unique sound and / or its unique electromagnetic signal or signal modulation are also provided, along with after-barrel guidance that can be used to improve accuracy. Control for discriminating between authorized and unauthorized users is also provided. A projectile device can also be used for inexpensive and harmless practice using optical and / or acoustic information gathered by targeting and imaging systems built into the device.

A projectile 360, 460 includes a body having a distal ogive section with external ballistic effect uniforming surface discontinuity (e.g., nose ring groove 369, 469) defined therein to provide an unsupported gap in the ogive profile which affects the flow of air over the front half of the ogive to provide greater aerodynamic uniformity and shot-to-shot consistency with more uniform observed external ballistics and superior terminal ballistics. The bullet's external surface discontinuity feature (369 or 469) creates effects in the flowfield that dominate any dynamic effects from bullet-to-bullet manufacturing inconsistency and resultant differences in dynamic behavior.

The invention relates to a light-gas gun pneumatic separation sabot, and aims at solving the problems that for an existing sabot, an additional device is needed to conduct separation on the sabot, the effect is not ideal and the cost is increased. The light-gas gun pneumatic separation sabot is composed of an upper supporting disc, a lower supporting disc and a base plate; the upper supporting disc and the lower supporting disc are two corresponding semi-cylinders. An upper half bullet hole is formed in the center of the upper supporting disc, and the middle of the upper half bullet hole is hollowed out to be of a hollow structure; the lower supporting disc and the base plate are formed to be a whole, a lower half bullet hole is formed in the center of the lower supporting disc, and the middle of the lower half bullet hole is hollowed out to be of the hollow structure; two seal grooves are carved on the base plate. The upper half bullet hole of the upper supporting disc corresponds to the lower half bullet hole of the lower supporting disc, a semicircle notch of the upper supporting disc is engaged with a boss of the lower supporting disc, under the condition of not adding a separating device, automatic separation of the sabot and a bullet is achieved through air resistance in a target chamber, and the light-gas gun pneumatic separation sabot has the advantages of improving the external ballistic property of the bullet and reducing the firing cost.

The invention discloses an achieving method of a cartridge-case-free automatic weapon adopting a liquid gun propellant. The weapon is driven by a stepping motor to achieve bullet filling and combustion chamber locking, and combustion chamber airtightness is achieved through a bullet and a fixed type plunger. Separated binary liquid gunpowder (oxidizing agent and combustion agent) is adopted as thegun propellant, a constant pressure adjuster is used for maintaining constant gun propellant ejection pressure, an electronic fire control unit (EFCU) is used for controlling the opening time of an electromagnetic valve so as to accurately control the ejection amount of mixed gun propellant, gunpowder ejection is completed through spraying holes in the plunger, and an electronic igniter is used for igniting the gun propellant to complete bullet launching. The weapon can easily achieve the functions of single launching, multiple launching, continuous launching and blank ammunition and rifle grenade launching; the launching power can be adjusted to achieve the optimal killing and wounding effect; an inner bullet channel can be actively corrected to ensure stability of an outer bullet channel; the shooting precision which is higher compared with bolt weapons can be achieved in the single launching mode, and continuous launching can be achieved for implementing fire control.

The invention relates to a guided transformation technology of rotating ammunition, in particular to an on-line calibration compensation method for an attitude misalignment angle between a magnetic measurement signal and a projectile body coordinate system. The invention solves the problem that the traditional calibration compensation method cannot calibrate and compensate the attitude misalignment angle between the magnetic measurement signal and the missile body coordinate system. An online calibration compensation method for the attitude misalignment angle between the magnetic measurement signal and the missile body coordinate system. The method is realized by the following steps: Step 1: Real-time acquisition of the three-axis geomagnetic field vector output by the magnetic measurement system during the ballistic flight outside the missile body signal H m ; Step 2: Estimate the roll angle γ of the projectile at any time t in the roll period T of the projectile; Step 3: Obtain the coefficient a of the fitting curve x , b x , c x , a y , b y , c y , a z , b z , c z ;Step 4: Solve the three-axis installation error angle matrix M between the coordinate system of the magnetic measurement system and the coordinate system of the missile body install ; Step 5: Obtain the three-axis geomagnetic field vector signal H under the projectile coordinate system b . The invention is suitable for the guided transformation of rotating ammunition.

A test guidance control method for external ballistic networking, including transforming the coordinates of target data measured by radar, photoelectric equipment and telemetry equipment to optimize the trajectory, and broadcasting the optimized trajectory data to all test equipment in real time, when the target tracking of the test equipment is lost , the received broadcast data is properly extrapolated to guide the device to quickly capture the target, and the ballistic optimization algorithm uses the least squares + Wright criterion. The present invention can complement each other on the ballistic section covered by the guidance and measurement data, and the test parameters can be used as backup and reference for each other, and make reasonable use of the special features of each measurement system, so that each measurement system can complete the test task in the most effective ballistic section. Significantly improve the data collection rate of a single set of equipment. Compared with the traditional test, the tracking rate of the network test equipment using the guidance control system of the present invention is significantly improved.

The invention discloses a mortar warhead mechanical trigger fuze with a penetration time self-adaptive function, which includes a body, a pneumatic safety mechanism / trigger firing mechanism, an inertia firing mechanism, an explosion-proof mechanism, a recoil safety mechanism and its anti-recovery mechanism, Delay release of insurance mechanism, setting mechanism, detonator, detonator and bottom screw. The two insurances of the fuze depend on the internal ballistic environment and the external ballistic environment respectively to release the insurance, and the two insurances of the flameproof part are in the insurance state during the loading stage and before the muzzle exit, and the safety is good; and it has the feature of fail-safe , in case the recoil insurance mechanism accidentally releases the insurance, the fuze will automatically transfer to the failsafe state to ensure safety in a credible service processing environment; the booster tube adopts a shaped charge structure with strong detonation ability; Redundant flame-resistant features, high reliability, can ensure the safety of unexploded ammunition and explosives disposal. The fuze has simple structure, easy processing and low cost.