In this video, I explain just about everything one possibly can about the voice of the steam locomotive: the whistle. We talk about what their purpose is, what the different whistle commands are, the parts of the whistle, how they work, and get nerdy with some acoustic science to finish it all off. Whistles are some of the coolest things out there, and I hope you enjoy this nerdy adventure with me!

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0:00 Intro
0:15 Overview
1:07 Whistle Purpose
3:32 D&RGW Whistle Signals
15:23 Doubleheading Signals
19:17 Quilling - Engineer's Signature
22:16 Whistle Parts @ CRRM
29:27 Chamber Seals + Languid Gaps
34:05 Whistle Pull Leverage
37:10 Whistle Acoustic Science
41:11 The wooden whistle answer
45:11 Chime length vs. speed of sound
48:31 Spectrogram Overview
50:11 Spectrogram Whistle Analysis
59:05 Outro