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Archive for » September, 2010 «
Quote From wantmoto.com “This Moto-Matic pedal moped is equipped with an E-50 port matched Medtrakit 80cc engine, a 21mm PHBG, Gianelli exhaust, and a brass knuckle starter.”
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DAN—Is the third Ghostbusters movie happening? What’s the story with that?
BILL—It’s all a bunch of crock. It’s a crock. There was a story—and I gotta be careful here, I don’t want to hurt someone’s feelings. When I hurt someone’s feelings, I really want to hurt them. [laughs] Harold Ramis said, Oh, I’ve got these guys, they write on The Office, and they’re really funny. They’re going to write the next Ghostbusters. And they had just written this movie that he had directed. more »
Quote From Larsplatoon “After 2 long years of on-and-off work my coilgun project is finally completed. For anyone who doesn’t know what a coilgun is, it’s a gun that fires a projectile with magnetic force instead of gunpowder. The projectile from this gun won’t kill a person, but the electrical energy stored in the capacitors is 78 times the lethal amount for human beings so this is no toy.
To answer a question that’s been asked quite frequently:
1.25kJ is the electrical energy stored in the capacitors, according to the equation E = 0.5*C*V^2. For this gun, C=15600uF and V=400V, thus E = 1248J. One of the main drawbacks for coilguns is EFFICIENCY, which, for single-stage hobbyist designs (like mine) is limited to about 3%. So if we assume a 3% efficiency, the kinetic energy (delivered to target by projectile) is in the area of 37J, which is much more than a bb gun but much less than a real gun. I don’t have the equipment to measure the kinetic energy (scale and chronometer), but as soon as I do I will report it.”
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