| 11. | The cyclist can then change gears manually by reversing the drive wheel.
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| 12. | The number of driving wheels on locomotives varied quite a bit.
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| 13. | Wootten instead mounted his huge firebox above the locomotive's driving wheels.
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| 14. | This allowed use of relatively small driving wheels without sacrificing speed.
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| 15. | The effective lifetime of the drive wheel tires is appropriately shortened.
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| 16. | In the main, numbers were allocated in descending order of driving wheel diameter.
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| 17. | All five engines had cylinders with piston valves and retained their driving wheels.
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| 18. | These drove a single pair of driving wheels, 30 " diameter.
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| 19. | To improve curve running the wheel flanges of the driving wheels were reduced.
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| 20. | A generator is connected to the rotating drive wheels via an overdrive transmission.
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