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Re: Silicon Controlled Rectifier
Quote:
Originally Posted by teh_pwnerer795
k thanxs for your help  i really appreciate it.
another quick question. Me and another student are having a heated argument over how long the barrel of the tube should be. Saying we have a four foot tube, my suggestion was to cut it in half. This way the three coils are kept close together and has a stronger punch at the beginning.
On the other hand he suggests we use the entire four feet of tubing to gain a greater momentum.
my question is. For this type of experiment, would the projectile travel faster in a short tube with the coils close together, or longer tube spread out?
by saying this, keep in mind that our robot is only 2 feet wide, 1 (1/2) feet long.
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Short tube, definitely. Your friend is probably thinking about explosively powered projectile weapons. In those cases, the additional barrel length allows the projectile to gain kinetic energy from the expanding gas for a longer period of time. In a coil gun, all that extra barrel length does is slow the projectile down due to friction from contact with the barrel. A longer barrel may help with accuracy somewhat, but you'd likely get similar improvement from rifling the barrel and using aerodynamic projectiles. One thing is for sure though, in a coil gun more barrel length will not increase the projectile's momentum. BTW, at school you may want to call this a 'Solenoid-based Electromagnetic Linear Accelerator' instead of a 'coilgun'... I don't know how uptight the administration is about weaponry in your school, but it might avoid some potential problems.
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Last edited by lukevanoort : 16-11-2007 at 19:45.
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