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Article | REF: D5535 V1

Rail traction - Force-controlled grip

Authors: Jean-Claude ALACOQUE, Pierre CHAPAS

Publication date: November 10, 2005

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2. Wheel-rail adhesion

2.1 Tractive and braking forces

  • The traction force of the thermal or electric motor of a self-propelled rail vehicle – locomotive, metro engine or tramway – is applied to the rail by each drive wheel via a mechanical transmission consisting of :

    • of the drive shaft ;

    • a motor speed reducer ;

    • of the axle, the axis connecting the drive wheels. The differential is provided by the conicity of the wheels (see 1.1

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Wheel-rail adhesion
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