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Wednesday 21 October 2026 19:33:13 GMT
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Train wheels can't steer… so how does a train take a curve? 🚂 Both wheels sit on one solid steel axle, so they always spin together. But through a quarter-turn curve the outside rail is almost 8 ft (2.4 m) longer, and a train has no differential. The flanges are only a backup. The real trick: every train wheel is a cone, wider on the inside. In a curve the axle drifts a fraction of an inch outward, so the outer wheel rolls on a bigger circle and the axle steers itself. Curve too tight? The wheels have to slip, and that's the screech you hear. Did you know trains turn on two cones? 👇 (Cone shape exaggerated in the diagrams.) #trains #railroad #engineering #howitworks #physics
Train wheels can't steer… so how does a train take a curve? 🚂 Both wheels sit on one solid steel axle, so they always spin together. But through a quarter-turn curve the outside rail is almost 8 ft (2.4 m) longer, and a train has no differential. The flanges are only a backup. The real trick: every train wheel is a cone, wider on the inside. In a curve the axle drifts a fraction of an inch outward, so the outer wheel rolls on a bigger circle and the axle steers itself. Curve too tight? The wheels have to slip, and that's the screech you hear. Did you know trains turn on two cones? 👇 (Cone shape exaggerated in the diagrams.) #trains #railroad #engineering #howitworks #physics


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#cungtamketvb #phimhay #tvb

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