Tip Speed / Drive RPM Calculator
Output Pulley Ratio
Motor Pulley Ratio
If you're unsure of your output & motor ratios instead in the same inputs you can enter:
Number of Teeth - output pulley teeth : motor pulley teeth. or
Pulley Diameter - output pulley diameter : motor pulley diameter
Max Tip Speed
Note: this is max theoretical tip speed with a fully charged lipo. Your spinner will spin slower than this in real life.
The UK spinners max theoretical tip speed is 250mph. If you are running a spinning weapon, it is your responsibility to ensure you are below this limit.
Rotation Velocity = max cell charge × cell number × motor kv / reduction ratio
Reduction Ratio = output pulley / motor pulley
Tip Speed = rpm × diameter × pi × 60/1609344
Tip Speed = rpm × circumference × rotatations × scaling for mph
Thanks to Rory Charlesworth for the inspiration and calculation help.
Website by joeb.xyz