Since the coil is wrapped around the tube from a plastic pen, and the iron projectile is inside the tube, it will fly along towards the coil. As all the energy from the capacitors will be spent in a matter of milliseconds, the coil should ideally be turned off by the time the projectile passes its center and exits out the other side of the tube.
Simon's plans and walk-through are wonderful. I learned a lot reading the detailed but easy to understand instructions. He also selects parts and components that I am sure I can source locally and I love that he improvised brackets from a plastic drinking bottle.
I also learned that I will not be making a coil gun. That curiosity is now satisfied!
You’d be forgiven for thinking the videocassette format long-dead, but it turns out that Betamax is still around. Sony is finally going to withdraw tapes from sale, bringing a 40-year story to an end. The last recorders were sold in 2002. ベータビデオカセットおよびマイクロMVカセットテープ出荷終了のお知らせ [Sony; via The Verge]
A leaked Comcast memo discloses that the company’s consumer data caps have nothing to do with network congestion, contrary to its public claims. The internet service provider has often complained (such as when lobbying against net neutrality) that it must impose limits on service to prevent network congestion. The argument suggests that these measures are […]
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