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Identifying a monster, threee chime AIR RAID SIREN
Posted: Tue Feb 08, 2011 12:50 pm
by Noob
Guys,
Snooping around, I found this behemoth, three chopper, air raid warning siren. Any clues to the origins?
Posted: Tue Feb 08, 2011 1:05 pm
by Toledo 2t22
Posted: Tue Feb 08, 2011 1:07 pm
by weasel2htm
This picture has been posted before, I don't think anyone knew exactly what it was.
Posted: Wed Feb 09, 2011 5:47 am
by Daniel
Technically, it isn't a "three chime" siren in the steam whistle sense, because all three rotors appear to have the same number of ports.
Posted: Wed Feb 09, 2011 10:56 am
by Noob
Pardon me. I am a whistle guy first. Siren guy second. On two tone sirens, isn't the second tone just an offset chopper that hits at a different time but with the same interval?
Posted: Wed Feb 09, 2011 12:52 pm
by SirenMadness
No, only a different speed or number of ports will give you a different sound.