# Shaft critical speed screening
# Scope: Jeffcott single-disc shaft critical speed from supplied static sag.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

sag = 0.2 mm
gravity = 9.81 m/s^2
operatingSpeed = 1000 rpm

critical := sqrt(gravity/sag) [rad/s]
speedFraction := operatingSpeed/critical

check speed separation screen: speedFraction <= 0.7

scenario alternative: sag = 0.16 mm