# Chain-drive speed and torque
# Scope: Ideal chain speed ratio; tooth counts supplied.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

driver = 15
driven = 45
speed = 600 rpm

ratio := driven/driver
output := speed/ratio [rpm]

check output speed target: output >= 150 rpm

scenario alternative: driver = 12