N/AAA

[SuperBanshee]

N/A Old Info.

[SoundMaster 391]

Wow this is some very amazing and interesting information. So the more arms there are, the more air it will pull in? Also was the SD-10 not that loud because it only had 3 arms in the chopper?

[r4tbolts]

Excellent reading. Nice post.

[Jake_7367]

Everytime an unread post shows up, I check who is the author in anticipation of seeing the words "SuperBanshee" written in purple. Your siren history/everything-you-ever-wanted-to-know-about threads are pure awesomeness.

[Chicagosiren-hunters]

Your knowledge never ceases to amaze me!

[coastalsyrolover]

That explains a lot. Great post as always!!!

[SuperBanshee]

Wow this is some very amazing and interesting information. So the more arms there are, the more air it will pull in? Also was the SD-10 not that loud because it only had 3 arms in the chopper?

That's correct - the SD-10 and Models 5T and 7T were not very loud as they only use 3 arms to draw in air. I live near an SD-10 and while it works nicely in the valleys, it's not loud enough to cover much of the city. It is located on top of a hill so most of its sound is projected downward. They were always meant as "filler" sirens: filling in for parts of a city where other sirens might not be heard. My city did just this, installing a mass of SD-10s to fill in new areas that were developed since they bought their original siren (a Mobil Directo). All worked well until one SD-10 decided to blow its top, then the city went around replacing everything with new 2001-130s. The rest is history.

[SoundMaster 391]

Wow this is some very amazing and interesting information. So the more arms there are, the more air it will pull in? Also was the SD-10 not that loud because it only had 3 arms in the chopper?

That's correct - the SD-10 and Models 5T and 7T were not very loud as they only use 3 arms to draw in air. I live near an SD-10 and while it works nicely in the valleys, it's not loud enough to cover much of the city. It is located on top of a hill so most of its sound is projected downward. They were always meant as "filler" sirens: filling in for parts of a city where other
sirens might not be heard. My city did just this, installing a mass of SD-10s to fill in new areas that were developed since they bought their original siren (a Mobil Directo). All worked well until one SD-10 decided to blow its top, then the city went around replacing everything with new 2001-130s. The rest is history.

Ah ok. Hawaii has some SD-10 sirens. Most of them were located either at places where they needed some coverage or in valleys.

[CycloneFan125]

Wow this is some very amazing and interesting information. So the more arms there are, the more air it will pull in? Also was the SD-10 not that loud because it only had 3 arms in the chopper?

That's correct - the SD-10 and Models 5T and 7T were not very loud as they only use 3 arms to draw in air. I live near an SD-10 and while it works nicely in the valleys, it's not loud enough to cover much of the city. It is located on top of a hill so most of its sound is projected downward. They were always meant as "filler" sirens: filling in for parts of a city where other sirens might not be heard. My city did just this, installing a mass of SD-10s to fill in new areas that were developed since they bought their original siren (a Mobil Directo). All worked well until one SD-10 decided to blow its top, then the city went around replacing everything with new 2001-130s. The rest is history.

This may be a little off topic but I'm just wondering since the system you described sounds like Beaver Dam, WI, which one SD-10 still exists. If you're talking about Beaver Dam how many 2001-130's are in Beaver Dam? And the three current SD-10's in Madison are on hills too (maybe not the one on Beld but the other two in Madison are) so they produce the sound further than expected.

[SuperBanshee]

I currently live in Beaver Dam, WI. The one SD-10 is located near an old chapel and clock tower near Curie Street. The SD-10 is very easy to hear through the hills, I was surprised it hadn't been replaced yet.

There are at least four 2001-130s in Beaver Dam: City Hall, Park Avenue, Lakeview Park, and another one on the north end of town by a McDonald's. They all replaced SD-10s or the Mobil Directo. When/if the last SD-10 gets replaced, a 2001-130 will probably go up in its place.