Recent content by fester225

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    Investigating Oddball Transformer: Baffling Results

    Since the horizontal wire is copper, I'd say it would develop magnetic polarity during each pulse, which would end after each pulse. As for your oscilloscope, given how sensitive those things are these days, I don't know what you'd see. It might be pretty strange though.
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    Investigating Oddball Transformer: Baffling Results

    A drawing of what you have would be very useful here.
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    Dropping a Cow Magnet Down a Metal Tube

    I came across a couple of cow magnets a while back. When you drop a cow magnet down the center of a vertical piece of steel conduit, it doesn't drop as fast as it usually would. When you drop a cow magnet down the center of a vertical copper plumbing pipe (closer fitting than the conduit)...
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    Investigating Oddball Transformer: Baffling Results

    Disclaimer: I'm no Physicist. As I recall, current flowing through a coil produces magnetic flux 90 degrees to the coil. In a transformer, that 90 degrees is taken up by a laminated iron core. The magnetic flux lines travel along the iron core until they encounter another coil. At that...
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    Not Homework (but it sure looks like it though)

    "Just out of curiosity .. does the bolt really travel 6+ inches during recoil? " If you're firing hot loads, yes.
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    Not Homework (but it sure looks like it though)

    I am a machine-gun enthusiast and am trying to understand the function of the “Grease-gun”. The M3 Greasegun is a 'blow-back' operated device. In this case, this means it's very simple. The portion of it which I am concerned about at the moment consists of a pistol or rifle barrel, the...
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    Self Cleaning Rack-and-Pinion Design?

    I have an application which would work very nicely with a rack-and-pinion. The problem is: the environment is inherently very dirty, and covering it isn't an option. Using the usual arrangement would cause it to quickly seize. Does anyone know of a self cleaning rack-and-pinion design?
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