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OT: Another super inefficient thermal motor (Electric)

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  • OT: Another super inefficient thermal motor (Electric)


  • #2
    That's allot of fun to watch. I could imagine what that 80w motor would look like after 2-3 minutes. Red hot?
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    • #3
      Seems to be two theory's actually for the source of the torque. There appears to be a thermal model and an electromagnetic model that suggest it could be either.

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      • #4
        Read "Michael Faraday".
        That is a variation of the drywall screw and the AA cell motor.
        I picked up one of these to amuse and fool the grand kids.
        Ebay 151865048522 https://www.youtube.com/watch?v=Q10KmQ3p4Co
        Max.
        Last edited by MaxHeadRoom; 02-28-2018, 02:52 PM.

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        • #5
          Another good one...

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          • #6
            A Homopolar motor courtesy of M.F. https://en.wikipedia.org/wiki/Homopolar_motor
            Max.

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            • #7
              I just made one. Very easy to make (~5 minutes) and surprisingly strong for only a few dozen windings.

              EDIT: Made a better one

              Last edited by 3 Phase Lightbulb; 02-28-2018, 04:48 PM.

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              • #8
                I'd say it's magnetic, thermal makes no sense.
                Also, at 40A I expect the bearings to be trashed in a matter of minutes.

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                • #9
                  Originally posted by The Doctor View Post
                  I'd say it's magnetic, thermal makes no sense.
                  Also, at 40A I expect the bearings to be trashed in a matter of minutes.
                  Already shown to be a Homopolar motor.
                  Max.

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