The ACA Cyclone was an outdoor warning siren built by Alerting Communicators of America, in 1968. The Cyclone has more of an older design that does not match their other sirens in production.
The Cyclone was designed in 1968, by Jim Biersach, as a 120dB siren. It was intended for civil defense purposes, but many communities have used it for other uses. In 1980, the P-50 was designed. It used the same rotor as the Cyclone used. The Cyclone was redesigned in 1980, and became 125dB at 100 feet, instead of 120. The Cyclone is still in production, however it is not a top-link product, as opposed to in the 1960s.
| Years | Type | Motor HP | Rotor/Stator interval | Notes |
|---|---|---|---|---|
| 1968–1970 | Cyclone 120 | 40 HP | 8-12 port | Sharply angled intake, none found in use. |
| 1970–1980 | Cyclone 120 | 50 HP | 8-12 port | Stator intake has a large air valve underneath it. |
| 1980- | Cyclone 125 | 50 HP | 8-12 port | Parallel stator, increased the decibel rating by 5. Still in production. [1] |
![[1]](http://jmarcoz.com/sirens/tworivers_wi.jpg){kind=link}