I was listening to Glenn Miller's Chattanooga Choo Choo tonight and the band imitating trains in the beginning got me thinking...
So I pulled up some whistle recordings on youtube and transcribed the notes on piano. Trains are full of music, and as a musician I find inspiration in their sounds. I know each whistle sounds different than the next so these are the recordings I used for reference:
PRR 3 chime (B flat, D flat and G flat) https://www.youtube.com/watch?v=S51U2MTt7eE&t=66s
Reading 6 chime (G, A, C, E flat, G, and A) https://www.youtube.com/watch?v=aeK_zyoJGTc
NYC 5 chime (A flat, C, E flat, F, A flat) https://www.youtube.com/watch?v=ZlNGP4gSZTg
Let me know if I got it right and give me some suggestions for more whistles to add to this fun project!