What is the RPM of an erector set motor with 4 AA batteries?

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The RPM of an erector set motor powered by 4 AA batteries is influenced by the applied voltage and the load on the motor. A user noted that a similar motor runs at approximately 7000 RPM with 4.5 volts, suggesting that the RPM could be in that range. To measure RPM accurately, various methods are available, including using a strobe light or smartphone apps designed for this purpose. It's important to consider that a heavier load will reduce the motor's RPM, potentially leading to stalling. Understanding these factors can help in estimating the RPM for hobby projects.
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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. :)
 
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Does anyone have an educated guess or a method for me to figure this?
 
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 can't for the life of me figure out a method to gathering this info. Please help. lol
 
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.
 
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