# O-ring gland-fill estimate
# Scope: Circular O-ring cross-section area versus rectangular gland area; swelling omitted.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

crossSection = 3 mm
glandWidth = 4 mm
glandDepth = 2.4 mm

fill := pi*crossSection^2/(4*glandWidth*glandDepth)

check example gland fill budget: fill <= 0.85

scenario alternative: crossSection = 2.4 mm