WHEQueen

Thank you so much. I think in my original research, I may not have gone far enough down the page, For a miniaturist, that shows an atypical lack of patience. I never expected an answer at warp speed. As we say in the south, "Bless your sweet heart!"

Not sure where to put this. I don't do Legos. I make mechanized miniature dioramas. O scale 1:48. I recently lucked into some LEGO motors. I have 5 of the 71427C01 9v old gray motors. Did I mention I was lucky? I searched the internet and I can't seem to find the original specs for this motor. I need to know the RPMs at 9v and if possible the lowest voltage at which this motor will operate. I could work this out by slomo video and trial and error on the voltage, but it would be really great if one of you folks had this info stored in your collective LEGO knowledge. Thanks for your time.