Railguns have the experimentally proven capability to accelerate masses of several kilograms velocities in excess 2 km/s. The U.S. ONR railgun project demonstrates that military application such high-performance railguns is becoming a realistic possibility nearer future. Up now, research at French-German Research Institute Saint-Louis (ISL) concentrates on reaching about 2.5 km/s with 300-g projectiles. current aimed developing payload for projectile. At same time, it attempted increase used...

At the French-German Research Institute (ISL), several railgun setups are used to investigate different military scenarios. One compelling scenario for a application is long-range artillery. For this, it required be able handle multimegaampere currents accelerate heavy launch packages of velocities above 2 km/s and do so as efficient possible. The NGL-60 6-m-long open-barrel breech-fed with square caliber 60 mm. With this railgun, will possible fully utilize currently available 10-MJ...

In the real world application of railguns, launch efficiency is one most important parameters. This directly relates to capacity electrical energy storage that needed for launch. this paper, rail/armature contact behavior two different armature technologies was compared. To end, experiments using aluminum c-shaped and copper brush type projectiles were performed under same initial conditions. The showed a superior with respect rails in acceleration. A 300-g projectile reached velocity 3100...

The French-German Research Institute of Saint-Louis pursues a wide and long-term experimental program for railgun research. One the accelerators in operation, SR\3-60 is an experiment to investigate behavior segmented railgun. Due its special construction, rails three segments can be mounted different configurations. Here results from two series shots with rail configurations are reported. (4 pages)

The SR\3-60 is a 2-m-long segmented railgun with three individual pairs of rails (segments). independence the segments allows up to projectiles be loaded into barrel and fired in rapid succession. This mode operation can increase firing rate decrease thermal load per segment, as compared simple During preparation for multishot experiments, different parameters describing performance acceleration are measured investigated. These pretests allow definition safe experiments. Initial experiments...

The French-German Research Institute (ISL) has several railguns installed, the largest of these is PEGASUS accelerator. It a 6-m long, 4 × 4-cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> caliber distributed energy supply railgun. 10-MJ capacitor bank as attached to it. In past, this installation was used accelerate projectiles with mass about 300 g velocities up 2500 m/s. ongoing investigation, it attempted heavier above 2000 For...

Augmentation is a well-known method to increase the velocity of railgun projectiles, while at same time keeping driving currents down. At French-German Research Institute Saint-Louis (ISL), several experiments using augmented railguns were performed. Here we report on study SR\3-60 as railgun. The 2-m-long composed three identical pairs rails that are rotated by an angle 60° with respect each other. This offers flexibility in use. In earlier experiments, it was used accelerate single...

The bore of a railgun is harsh environment with high transient magnetic fields, temperature gradients, and forces. Most common payloads in launch are made from conductive materials. In this article, we consider the effects field on conducting payload during an electromagnetic by serial augmented hexagonal railgun. distribution proximity solid aluminum was investigated numerical calculations experimentally using CMR-B-scalar sensor array.

Linear electromagnetic acceleration has a wide range of applications. Among them are applications in the field materials science, where relatively small, inexpensive systems can be high value. For instance, it was shown recently at French-German Institute Saint Louis, France, that symmetric Taylor test-a method to investigate deformation behavior specimens rates-can realized with higher precision than attainable other methods using railgun velocity control. In this paper, we present another...

In railguns, projectiles can be accelerated to velocities of up several kilometers per second. many respects, a railgun represents harsh environment for the projectile. To obtain large muzzle velocities, it has withstand extreme acceleration, friction, and heat. The currents being involved give rise strong magnetic fields field gradients. All these effects might affect any electronic circuitry that projectile is equipped with. able monitor parameters like current, strength, temperature,...

Railgun performance requires a low-resistance electric gliding contact between the rails and armature. The electromagnetic forces, which accelerate launch package (0.7 to 3 kg mass) up more than 2000 m/s, are acting on as repulsive forces. Therefore, of NGL60 gun, with caliber 60× 60 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , held in their position by an arrangement discrete steel bolts, further beams plates made glass fiber...

Railguns are capable to far exceed the muzzle energies of current naval deck guns. Therefore one most promising scenario for future application railguns in warfare is long range artillery. Hypervelocity projectiles being propelled velocities above 2 km/s reach targets at distances 200 km or more. At French-German Research Institute PEGASUS launcher used investigations with respect this scenario. The 6 m barrel has a square caliber 40 mm. power supply unit able deliver 10 MJ gun. Within...

Railguns have the experimentally proven capability to accelerate masses of several kilograms velocities in excess 2 km/s. The US ONR railgun project demonstrates that military application such high performance railguns is becoming a realistic possibility nearer future. One current research projects French-German Research Institute Saint-Louis being aimed at developing payload for projectile and same time increase used primary energy. Up now concentrated on reaching about 2.5 km/s with 300 g...

The French-German Research Institute (ISL) has several railguns installed, the largest of these is PEGASUS accelerator. It a 6 m long, 4 × cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> caliber distributed energy supply (DES) railgun. 10 MJ capacitor bank as attached to it. In past, this installation was used accelerate projectiles with mass about 300 g velocities up 2500 m/s. ongoing investigation, it attempted heavier above 2000...