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Navy Railgun Tests Leading to Ship Superweapon by 2020
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<blockquote data-quote="El Mahdi" data-source="post: 5837351" data-attributes="member: 59506"><p>From the article:</p><p> </p><p> </p><p> </p><p>Not <em>aimed</em> projectiles, <em>guided</em> projectiles. The only propulsion they would have would be that which they get from the initial firing. But they can still be guided projectiles in much the same way we have guided gravity bombs. They could use camera, radar, laser targeting, ground mapping with inertial nav, GPS, or a combination of these for guidance (like Boeing's JDAM package).</p><p> </p><p>Railgun projectiles could look something like this:</p><p> </p><p><a href="http://en.wikipedia.org/wiki/File:German_railgun_Bild_4.gif" target="_blank"><img src="http://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/German_railgun_Bild_4.gif/220px-German_railgun_Bild_4.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p> </p><p> </p><p>For comparison, a MK-84 JDAM. A 2000lb <em>guided</em> gravity bomb with GPS/Inertial Nav and Laser Targeting.</p><p><a href="http://upload.wikimedia.org/wikipedia/commons/9/98/GBU-31_xxl.jpg" target="_blank"><img src="http://upload.wikimedia.org/wikipedia/commons/thumb/9/98/GBU-31_xxl.jpg/799px-GBU-31_xxl.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p> </p><p> </p><p></p><p> </p><p>Yup! In mechanical and military parlance, we call it <em>"spalling"</em>.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p><p> </p><p> </p><p></p><p> </p><p>Well, a bazooka has very little recoil because 1) the propelling force is internal to the projectile (unlike the rail gun); and 2) the rear of the launch tube is open, so the force of the rocket engine does not directly interact with the launch tube - if the back of the tube was closed, then the person holding the weapon would experience the full recoil of the rocket (which would be extreme to say the least, at least until the launch tube exploded...)</p><p> </p><p>With the rail-gun, the force to propel the projectile is coming from the rails affixed to the inside if the weapon. Picture it this way, in much the same manner as a balloon squeezes out the air inside it (though equalization of pressure is also involved), and thus propels itself in an opposite direction - the magnetic fields of the rails are squeezing out the electfrified projectile (which now has it's own magnetic field), while much like the balloon, the weapon itself is propelled in the opposite direction (except that the gun is affixed and has mechanisms to disipate the recoil).</p><p> </p><p><img src="http://www.enworld.org/forum/images/smilies/glasses.png" class="smilie" loading="lazy" alt="B-)" title="Glasses B-)" data-shortname="B-)" /></p></blockquote><p></p>
[QUOTE="El Mahdi, post: 5837351, member: 59506"] From the article: Not [I]aimed[/I] projectiles, [I]guided[/I] projectiles. The only propulsion they would have would be that which they get from the initial firing. But they can still be guided projectiles in much the same way we have guided gravity bombs. They could use camera, radar, laser targeting, ground mapping with inertial nav, GPS, or a combination of these for guidance (like Boeing's JDAM package). Railgun projectiles could look something like this: [URL="http://en.wikipedia.org/wiki/File:German_railgun_Bild_4.gif"][IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/German_railgun_Bild_4.gif/220px-German_railgun_Bild_4.gif[/IMG][/URL] For comparison, a MK-84 JDAM. A 2000lb [I]guided[/I] gravity bomb with GPS/Inertial Nav and Laser Targeting. [URL="http://upload.wikimedia.org/wikipedia/commons/9/98/GBU-31_xxl.jpg"][IMG]http://upload.wikimedia.org/wikipedia/commons/thumb/9/98/GBU-31_xxl.jpg/799px-GBU-31_xxl.jpg[/IMG][/URL] Yup! In mechanical and military parlance, we call it [I]"spalling"[/I].:D Well, a bazooka has very little recoil because 1) the propelling force is internal to the projectile (unlike the rail gun); and 2) the rear of the launch tube is open, so the force of the rocket engine does not directly interact with the launch tube - if the back of the tube was closed, then the person holding the weapon would experience the full recoil of the rocket (which would be extreme to say the least, at least until the launch tube exploded...) With the rail-gun, the force to propel the projectile is coming from the rails affixed to the inside if the weapon. Picture it this way, in much the same manner as a balloon squeezes out the air inside it (though equalization of pressure is also involved), and thus propels itself in an opposite direction - the magnetic fields of the rails are squeezing out the electfrified projectile (which now has it's own magnetic field), while much like the balloon, the weapon itself is propelled in the opposite direction (except that the gun is affixed and has mechanisms to disipate the recoil). B-) [/QUOTE]
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