Eine Railgun beschleunigt das Projektil durch die magnetische Wechselwirkung eines elektrischen Stromes, der über die Schienen auf das Projektil selbst oder auf einen hinter dem Projektil geladenen Treiber fließt, mit dem Magnetfeld des Schienenstromes selbst. A 32 Megajoule prototype has been delivered by BAE Systems. It also follows that, for railguns with projectile masses of a few kg and barrel lengths of a few m, very large currents will be required to accelerate projectiles to velocities of the order of 1000 m/s.Next, to evaluate the force on the armature, the above expression for the magnetic field on the armature can be used in conjunction with the Lorentz Force Law,So the lumped parameter model also predicts the force for this case as:Railguns have a number of potential practical applications, primarily for the military. BAE Systems to integrate Hybrid Electric Drive onto a combat vehicle under U.S. Army contract Jul 16 2020. 026/2009. For a more workable simple model, a useful alternative is to use a lumped circuit model, to describe the relationship between the driving current and the railgun force.Since the lumped circuit model describes the railgun force in terms of fairly normal circuit equations, it becomes possible to specify a simple time domain model of a railgun.5ygIgnoring friction and air drag, the projectile acceleration is given byWith practical railgun geometries, much more accurate two or three dimensional models of the rail and armature current distributions (and the associated forces) can be computed, e.g., by using finite element methods to solve formulations based on either the scalar magnetic potential or the magnetic vector potential.Major technological and operational hurdles must be overcome before railguns can be deployed:Here the force, current and field are all treated as vectors, so the above vector cross product gives a force directed along the bore axis, acting on the current in the armature, as a consequence of the magnetic field.Assuming that the many technical challenges facing fieldable railguns are overcome, including issues like railgun projectile guidance, rail endurance, and combat survivability and reliability of the electrical power supply, the increased launch velocities of railguns may provide advantages over more conventional guns for a variety of offensive and defensive scenarios. BAE is working with the Navy on a rep-rate barrel design and fabrication as well as a pulsed power system. The most promising near-term application for weapons-rated railguns and electromagnetic guns, in general, is probably aboard naval ships with sufficient spare electrical generating capacity and battery storage space. Space Symposium ... vice president and general manager of Weapon Systems at BAE Systems. The most promising near-term application for weapons-rated railguns and electromagnetic guns, in general, is probably aboard naval ships with sufficient spare electrical generating capacity and battery storage space. This program was the US Army's third attempt to replace the aging M2 Bradley. Ground combat forces, however, may find that co-locating an additional electrical power supply on the battlefield for every gun system may not be as weight and space efficient, survivable, or convenient a source of immediate projectile-launching energy as conventional propellants, which are currently manufactured safely behind the lines and delivered to the weapon, pre-packaged, through a robust and dispersed logistics system.In these models the railgun is modeled on an electrical circuit and the driving force can be determined from the energy flow in the circuit.

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