
Railway Mechanics
Coupler Slack Explains Why a Long Train Does Not Move as One Rigid Piece
Understand the small movements between coupled railway vehicles and why slack affects how a long train responds.

Understand the small movements between coupled railway vehicles and why slack affects how a long train responds.

Track gauge tells you about the rails. Loading gauge asks whether a vehicle and its load fit the route around them.

Identify the purpose of a steam locomotive’s sand dome and use museum labels and historical photographs to distinguish it from steam equipment.

Read a historical railway map by checking its date, purpose, legend and surrounding evidence before assuming a line was operating.