https://www.youtube.com/watch?v=QxaR_lPV5ko
So I came across this video of someone from Alaska who I think bought a Castle Castings siren from the UK and ran it on a 3-phase converter if I'm not mistaken. Crazy thing is though that it sounds like it runs on 50hz, though the Mains Frequency is 60hz in America.
Maybe this disspells the idea that sirens run at different RPMs depending on the 50-60Hz level from country to country?
At the same time he could be running it on a separate 3 phase generator like atticboy11 did with his Castle Castings at the Severn Valley Railway in England.
https://www.youtube.com/watch?v=0qjlbt4qlRY
What are your thoughts guys?