09/01/2023
SS ALPENA IN GREEN BAY - Fire/Fog Horn and Steam horn exchange
I took my Type B Diaphone to Green Bay to try and get a steam salute out of the Alpena. I was supposed to go to the Grassy Island Range Lights and get a cool video from there...but we missed them.
A friend who was meeting me anyway scouted for a 2nd location and got permission from some cool construction workers to set up on the edge of the new marina by Mason Street. I'm really happy to see that land finally getting used!
A HUGE THANKS to the pilothouse crew of the Alpena for saluting back! I know it's not the best timing. Next time we come back I'll see you at the mouth of the Fox, and not between the bridges!
This Type B Diaphone generates sound much like a siren. Where a siren has a slotted rotor that spins, diaphones have a slotted piston that oscillates very quickly inside of a similarly slotted cylinder. The piston is driven and cushioned by air. As the piston oscillates, the slots on the piston and cylinder line up and air is forced through and quickly cut off. That "chopping" many times per second is what generates the sound we hear.
Diaphones are classified by size by "Type." The Type B is the second smallest made, but the smallest mass-produced diaphone. (Types A, B, C, CC, F, F2T, G, K, L)
The B was used in very few lighthouses as a fog horn but Gamewell (the fire company) manufactured these to sound above fire stations. A fair amount are still in use, but not in the Great Lakes region.
The diaphone attained its fame as a fog horn. The Type F (with the grunt) and later the two-toned F2T. You can find videos of the Type F and more videos of this horn elsewhere on my YouTube channel. (Lighthouse Jake)
Thanks for stopping by!
Jake