So, I want to make a small hand-operated electric generator with my kids just to kind of show them how this kind of thing works. I understand the basics, but there are some things I want to do that I ...

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[This article was first published in Army Sustainment Professional Bulletin, which was then called Army Logistician, volume 2, number 4 (July–August 1970), pages 18–21. The text is reproduced as ...