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Cary Clark / FAQ / Trains / rack | |
| What’s a rack railway? From Larry Pieniazek: ! Rack railways are also called cog railways. In addition to the two weight bearing rails there is a central toothed rack that a cog on the power car engages. When the limits of adhesion are reached during the ascent (typically around 5% grade or so) the cog engages and powers the ascent. Similarly on descent, the cog takes the primary braking load. |
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