| 1. | The leading and trailing wheels were fitted with roller bearings.
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| 2. | Delta trucks were soon enlarged to carry four trailing wheels, and later six.
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| 3. | The trailing wheels also proved to be troublesome.
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| 4. | Churchward resulting locomotive designs excluded trailing wheels, which maximised adhesion on the South Devon Banks.
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| 5. | In the Whyte notation, trailing wheels are designated by the last numbers in the series.
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| 6. | The wheel arrangement's disadvantages included the firebox size restriction caused by the lack of trailing wheel.
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| 7. | Trailing wheels first appeared on American locomotives between 1890 and 1895, but their axle worked in rigid pedestals.
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| 8. | The frame is a single tube following the circumference of the front wheel, then diverting to a trailing wheel.
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| 9. | The 4-6-2 designation means it has 4 leading wheels, 6 driving wheels, and 2 trailing wheels.
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| 10. | The drive was on the trailing wheels and the slide bars were attached to a motion bracket just behind the leading wheels.
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