Hi everyone!<br><br>I just had to register and post because of this idea I came up with after looking at Joerg's videos that have magnets in them.<br><br>First of all, I have no idea how much projectile speed friction eats away on weapons with a barrel or a guided projectile track. I understand that not knowing this info may make this whole thing obsolete.<br><br>Anyhow, what if one used diamagnetic levitation to either lessen or even totally counteract the force of gravity. Basically just having a strong magnetic rail that repulses the projectile, even if it couldn't levitate the projectile it could lessen the friction. The projectile itself should probably be made of something like Bismuth, but then again that is used in projectiles anyhow. Lead could work to some extent too. Another interesting option might be to try to accelerate the projectile with those neodymium magnets embedded into the projectile track at 45 degree angle or so; so that they repulse and thus accelerate the projectile additionally after the rubber has been launched.<br><br>Obviously another possibility that comes to mind is a slingshot-coilgun hybrid where the initial launch would happen with the sling and the coilgun portion would be near the barrel to add acceleration. But that would apparently work best with ferromagnetic projectiles and is a topic for another discussion anyhow.<br><br>I understand that one of the main points of slingshots is simplicity and cost effectiveness, but hopefully that doesn't hinder the search for more power <img src="http://illiweb.com/fa/i/smiles/icon_smile.gif" alt="Smile" longdesc="2"><br><br>P.S. As a new member I can't post a link, but google can help to find more info about the principle.