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RPM of erector set motor?

  1. Aug 12, 2013 #1
    This is a really dumb question that I have not found an answer for.

    I recently bought an erector set with a 3-6 volt motor. It has the option of 2 or 4 AA batteries.

    I am trying to figure out what the RPM's are with 4 AA batteries for a small hobby project of mine.

    I know this is simple stupid for some, but can someone give me an educated guess as to what the RPM's most likely are?

    Thanks very much. :)
  2. jcsd
  3. Aug 13, 2013 #2
    Does anyone have an educated guess or a method for me to figure this?
  4. Aug 14, 2013 #3
    I have googled the crap out of this and am having 0 luck. I just need a decent guestamate. The exact number isn't important at this time. I'm building a little project and want to limit the final RPM to around 12000.

    I cant for the life of me figure out a method to gathering this info. Please help. lol
  5. Aug 15, 2013 #4


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  6. Aug 15, 2013 #5
  7. Aug 15, 2013 #6


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    You may measure the "no load" rpm of the motor with various voltages applied.
    The motor rpm will depend on two variables: the applied voltage, as you know, and
    the load the motor is driving. A "heavy" load will slow your motor greatly; too large a load would cause it to stall.
  8. Sep 23, 2015 #7
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