Why Are Rails Shaped Like That?

Summary by Krater

This video explores the engineering of train wheels and rails, explaining why they are tapered and how conical wheel geometry, flanges, and rail profiles prevent slippage and wear on curves.

From the video

Answers: Why do train wheels and rails have that specific shape?

• Train wheels and rail mechanics
• Conical wheel geometry
• Wheel flanges
• Rail wear and curving dynamics
• Solid axle vs independent wheel issues

What it concludes

• Conical train wheels naturally self-center between two rails on curves and straight sections.
• Solid axles on train sets cause slipping and wear on curves because inner and outer track lengths differ.
• Flanges on the inside of wheels keep trains on track even if one wheel lifts off.
• The AAR-2A rail car wheel profile reduces wear by 40% compared to previous specifications.