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This locomotive could haul 30 tons of coal up a hill at, and was the first successful flanged-wheel adhesion locomotive: its traction depended only on the contact between its flanged wheels and the rail.

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This locomotive could haul 30 tons of coal up a hill at 4 mph ( 6. 4 km / h ), and was the first successful flanged-wheel adhesion locomotive ; its traction depended only on the contact between its flanged wheels and the rail.

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