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

[texasman1979]

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. :)

 

[texasman1979]

Does anyone have an educated guess or a method for me to figure this?

 

[texasman1979]

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

 

[Bobbywhy]

Here’s a description of how to measure the rpm of your motor: http://www.ehow.com/how_5021934_use-strobe-light-measure-rpm.html

Here’s a whole line of professional instruments that measure rpm of machinery. The prices start at around $400.:
http://www.checkline.com/portable_strobe/

Here’s an app for your smart phone that will measure the motor’s rpm:
https://play.google.com/store/apps/details?id=com.tp77.StrobeAd&hl=en

 

[256bits]

The guy here says his motor runs at 7000rpm with 4.5 volts.
Perhaps your motor does too.
The rpm would depend on the source voltage.


http://www.worthpoint.com/worthopedia/erector-meccano-set-electric-winch-67314384

 

[Bobbywhy]

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.

 

[SuperPhysicsFun]

In case anybody else comes across this. I found another professional led stroboscope. It goes up to 150k RPM http://imada.com/product-category/stroboscope-and-tachometers/led-stroboscopes/