md5 wrote:I think that one nearly out does the O' Fallon Missouri siren video on YouTube. Looks like someone doesn't know how to do yearly checkups on them. With it doing that weird low tone going up and down nearly makes a whole new scenario.

At least the one in O'Fallon, IL was rotating. Both the O'Fallon Thunderbolt and this one appear to be having the same sort of motor problems, either severely worn brushes, or a bad armerture in the chopper motor.
Notice that when this one winds down and starts back up again, it sounds a whole lot like
the Trunnel Thunderbolt I recorded. After that, it just starts going crazy!