1. What is the typical deflection range of a steel spring vs. a composite spring under load?
Steel springs deflect 10–20mm under load, balancing stability and ride quality. Composite springs deflect 15–25mm, offering better shock absorption for passenger rails but less rigidity for heavy loads.
2. How do leaf springs with tapered vs. uniform plates perform in terms of weight distribution?
Tapered leaf springs distribute weight more evenly, reducing stress on rail flanges. Uniform plates are simpler but concentrate pressure, suitable for lighter rails where weight distribution is less critical.
3. What makes springs for electrified rails different from those for non-electrified rails?
Electrified rail springs include non-conductive bushings to prevent current leakage. They are lighter to reduce energy use, while non-electrified springs focus solely on durability, using thicker steel for freight loads.
4. How do spring materials affect compatibility with different rail fasteners?
Steel springs work with all fastener types, enduring high clamping forces. Composite springs require gentler fasteners to avoid damage, pairing best with adjustable clips that apply lower tension.
5. What size variations exist in springs for narrow-gauge (1067mm) vs. meter-gauge (1000mm) railways?
Narrow-gauge springs are shorter (100–120mm) to fit limited space, while meter-gauge springs are slightly longer (120–140mm). Both are narrower than standard-gauge springs, reducing weight for lighter rails.