gear-train PASS

Spur-gear pair on a carrier plate from sources/gear-pair-spec.md (the only source; text, authoritative): a 20-tooth pinion and a 40-tooth wheel, module 2, pressure angle 20 deg, no profile shift, face width 8, each tooth thinned 0.05 at its pitch circle for 0.10 total circular backlash, on revolute joints on a 110 x 50 x 5 carrier plate at the pinion axis (0, 0) and the wheel axis (60, 0). The pin

clip play carrier (modelled) pinion (modelled) wheel (modelled)

gates

[A] parts_pass	PASS
[A] bom_complete	PASS
[A] joint_fidelity	PASS
[A] clearances	PASS
[A] motion_clear	PASS
[A] fluid_domain	n/a
[B] export_agreement	PASS
[B] performance	PASS
[B] conservation	n/a
[B] refinement	n/a
[C] source_hygiene	PASS
[C] boundaries_complete	n/a
[C] provenance	PASS
[C] evidence_separation	PASS

observables

id	status	value ± u_numerical	mesh-resolved	case
gearRatio	ok	-0.5	-

A value its mesh ladder does not resolve is not evidence of performance; report.md gives each prediction's validation basis.