Interestingly, it has a repulsion start induction motor. I initially thought it had a universal motor, given the lack of caps and the fact that it had brushes, but once I put full power to it, I could tell by the strange wind-up it had. It has a windup that starts off logarithmic like a typical brushed motor (universal, series, repulsion-induction, etc.) but then switches to linear once it gets up to a fast enough speed as the brushes as disengaged, and the motor switches to running on just the windings. It's a two-pole motor, so it tops out at around 3300 RPM. It kinda caught me off guard to hear it start and peak the way it did since I've never seen a video of any mechanical siren that used this type of motor before, at least one with a functional switch and actually gets up to speed. It also sounds like a slow running 12 port Federal/Fedelcode due to the unequal length vanes. Since it has 6 long vanes and 3 short ones, it has the same ratio and produces a similar undertone. I'm editing the video I took of it along with some that I shot from my Alabama trip this past Wednesday. Once I finish all of the editing and get them uploaded to YouTube, I'll post it all here, so look for those soon.
Here are the pics of it and some of it sitting next to my Model 1 for comparison. For as big of a siren that it is, there isn't much difference in weight between it and my Model 1. The M1 weighs about 80 pounds and has an 9-ish inch chopper. This thing on the other hand weighs about 90 and has a 13 inch chopper. It makes me wonder how big the housing for it was. Presumably whatever fire company originally owned this siren probably kept it as a display or something and let the core go. Finders keepers
