What speed did the CLM siren rotate at? There is a video on YouTube that shows it rotating very fast, but I can?t work out if the video shows a CLM rotating under its own power using its rotator, or if it is simply being pushed by hand.
I can hear a hum in the video, but I can?t work out if this is the rotator motor, some sort of other motor on the roof of the building (perhaps a ventilation unit), the camera itself, or just some ambient noise.
This video of the building on which the CLM was located being demolished seems to show the siren spinning as the building collapses, indicating that the rotator was not locked, and therefore could have been spun by hand.
I also can?t work out how fast the siren is rotating in the Tocsin B Exercise (I?m fairly certain that the siren is a CLM) ? I can?t establish how much of the variation in sound is caused by the rotation and how much is caused by the quality of the old recording. Does this siren sound as though it is rotating as fast as the one in the video?
Thanks for any replies!
Regards,
Jerry.