abstract
| - A Heavy Rail Rifle uses a series of powerful electromagnets and super-conductive electrodes to accelerate small, solid and conductive projectiles to hypersonic speeds. The resulting high levels of kinetic force imparted to the weapon's projectile then allows it to devastate and destroy all but the most heavily armoured vehicles on impact, even at exteme range. Because the projectile is capable of achieving a velocity of anywhere between six and ten times the speed of sound, it generates a tremendous force that is often far more than would be produced by an explosive charge of the same size. As such, the speed of the projectile is enough to punch through even the thickest of enemy armour. The size of the weapon determines the size of its power source and thus the kinetic force imparted to the type of projectile used as ammunition. Heavy Rail Rifles usually fire single, solid projectiles and rely on the projectile's speed to penetrate armour, even at long ranges. Because the projectiles are so small, large numbers can be carried by the weapon's operator at a time. Such is the power of an XV88 Broadside Battlesuit's Heavy Rail Rifle shot that it can penetrate the thickest plasteel bunkers, often doing so with enough force to punch cleanly through both sides of the structure. However, when used against infantry, a Heavy Rail Rifle can have a devastating effect where the round will simply vaporise the target. Those near the path of the projectile will also find the breath sucked out of their lungs, such is its speed. A Heavy Rail Rifle makes an iconic "whip-crack" sound when it fires, which is created when the Heavy Rail Rifle's round breaks the sound barrier. Many enemy soldiers have learned to dread it as its distinct noise could only be heard after the round had already hit home. The basic physical principles behind Rail Weapon technology is well-known to the Adeptus Mechanicus, but the Imperium has never been able to utilise it in a tactical form due to the myriad issues inherent in the operation of such weapons. The limitations of such technology include the staggering amount of power required to propel the projectile along the rail, and the dissipation of the heat generated by the process. The Tau appear to have implemented solutions to these problems, and many Hereteks amongst the Adeptus Mechanicus would very much like to understand how.
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