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Quill | The style used by an engineer to blow the whistle or horn. Also refers to the whistle. |
Quill Drive | Westinghouse electric motor system (c. 1917). Traction motors were mounted to the locomotive frame and drove the wheels through a hollow axle ("quill"). |
Quilling | Personalized technique of blowing a locomotive whistle, applicable only in the days before the whistles became standardized |