I am looking for two DC electric motors which will run on A23 AAAA AAA or AA or 9V.
One motor which is either slow or variable speed and can run slow (1 turn in 5-10 seconds or so).
One motor that is as fast as they come.
We will be mounting the high-speed motor on a platform which is supported by the shaft of the slow-turning motor
Will want to connect them to radio controls so they can be turned on and off via remote control.
We will use this for elementary school demonstrations of the principles of angular momentum.
For the fast motor, you just need a non-geared DC motor:
robotshop.com/en/dc-motors.html
For a slow, the slowest we offer are in the spur gear category:
robotshop.com/en/spur-gearmotors.html
Ex: robotshop.com/en/12v-6rpm-61 … RB-Sct-595
You can also consider a variable speed gear box:
robotshop.com/en/tamiya-plan … =RB-Tam-04
You assemble one with many gears, and another with very few.
Regarding the remote control, do you want it wired or wireless? Do you need to control the speed or just on/off?