An ACA P-50 courtesy airraidsirens.com
The ACA Penetrator-50 or ASC-T135 is the 2nd loudest and, coincidently, the 2nd largest siren in the world. It has a large fiberglass horn, that houses a dual tone 8/12 port chopper it is powered by a Doerr Electric 50HP 3-phase motor. The motor is under the cone shaped cover on the back. It also has a creepy sound, especially when heard in a distant location with other ones that add to make it creepier (ACA Allertor for instance). This can also be the only Civil Defense motor siren that, in some cases, plays a perfect B♭ Major chord. This siren is the last, and most powerful, siren in the Penetrator series.
History []
The P-50 was introduced around the late 1980's as the 50 HP model of the Penetrator. In November 1992, ACA's parent company, Biersach & Niedermeyer Co., declared bankruptcy and sold ACA to a German company who would continue production on a number of ACA sirens. However, because the sirens were not produced under ACA any more, the model numbers were changed on many of them, including the P-50 which was renamed as the ASC T-135. Following the late 1992 selling and rebranding of ACA into ASC, the siren continued to be produced well into the 2000's. In early 2007, ASC announced that it will cease all production of the P-50/T-135 sirens. The last P-50 rolled off the assembly line late that year, bringing the manufacture of the P-50/T-135 to a close.
Cities with these sirens[]
Wisconsin: Paris, Milwaukee, Kenosha, Rib Mountain,(which is an t-135ac) Hudson (also a t-135ac) West Allis, Bristol, Trevor, Somers, New Munster, Paddock Lake, Glendale, Pleasant Prairie,
Kansas: Kansas City
Illinois: Chicago, Aurora, Bartlett, Joilet, Lisle, Plainfield, Somers, Desplaines, Campton Hills, Schaumburg, Morrison
Texas: Bedford, DeSoto, Keene, Marshall, Paris, Richland Hills, NRH (north richland hills) Stephenville, Sweetwater, Seagoville, San Angelo
Tennessee: Memphis, Cordova, Kingsport