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500AT
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German outdoor pneumatic sirens

Fri Jan 19, 2007 9:26 pm


Sincerely yours,

Ron W.

"When your siren's a failin', chances are it's a Whelen."

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SirenMadness
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Fri Jan 19, 2007 10:56 pm

The HLS are truly amazing.

The HLS have a brass chopper of about three inches in diameter. It is no surprise that pneumatic sirens work very well with small choppers, or ports, for that matter, because when you have air piling up in a big chopper, and expelled through big ports, allot of time and energy would be wasted in getting the pressure of the air flowing through the chopper just right.

My god, is that '273 shaking in the wind?!

The thing that I like about the HLS sirens is that they, or at least the HLS 273, have two stators, one inside the chopper for possibly as little displacement of air as possible, and a sound-function stator on the outside, with passage ways curving down, where they meet with the horns.

Here is a great thread showing the parts: http://48645.rapidforum.com/area=11&order=u&startid=2, called "Restauration HLS 273."
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AllSafe
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Fri Jan 19, 2007 11:08 pm

They are remarkably efficient for pneumatic sirens. The engine which drives the compressor is only fifteen horsepower.

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Fri Jan 19, 2007 11:43 pm

Deutz is pretty impressive. Deutz even built engines for some examples of GE's AC600CW locomotives, I think.

What I like about the transmission system for the HLS' compressor is the fact that there is a clutch for disengagement of compressor power with the compressor for that famous, "with a cold" wail.
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Re: German outdoor pneumatic sirens

Wed Nov 29, 2017 7:41 pm

Did the Rickmers Werft sirens have a disc rotor? I know the HLS 273 and 373s have a small cylinder rotor.
Proud owner of a Federal Sign & Signal Thunderbolt 1000A, Federal Sign & Signal Model L, Darley Model 2-120 and a Model 120 from the San Onofre Nuclear Power Plant.
Model 120 wiki: https://wiki.airraidsirens.net/Model_120

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Model L
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Re: German outdoor pneumatic sirens

Wed Nov 29, 2017 7:48 pm

possibly. #Bump
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DJ2226
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Re: German outdoor pneumatic sirens

Thu Nov 30, 2017 3:35 am

Duderocks5539 wrote:
Wed Nov 29, 2017 7:41 pm
Did the Rickmers Werft sirens have a disc rotor? I know the HLS 273 and 373s have a small cylinder rotor.
Yes. Actually all of the larger pneumatic sirens use disk based choppers.
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Re: German outdoor pneumatic sirens

Thu Nov 30, 2017 4:18 am

Rotor from a Pintsch Bamag.
Image
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Duderocks5539
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Re: German outdoor pneumatic sirens

Thu Nov 30, 2017 3:38 pm

DJ2226 wrote:
Thu Nov 30, 2017 4:18 am
Rotor from a Pintsch Bamag.
Image
It has the same keyed shaft fitting on the rotor as my model 120.
Proud owner of a Federal Sign & Signal Thunderbolt 1000A, Federal Sign & Signal Model L, Darley Model 2-120 and a Model 120 from the San Onofre Nuclear Power Plant.
Model 120 wiki: https://wiki.airraidsirens.net/Model_120

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Duderocks5539
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Re: German outdoor pneumatic sirens

Thu Nov 30, 2017 3:46 pm

Ive heard someone say the Rickmers Werft's were custom made ,is that true?
Proud owner of a Federal Sign & Signal Thunderbolt 1000A, Federal Sign & Signal Model L, Darley Model 2-120 and a Model 120 from the San Onofre Nuclear Power Plant.
Model 120 wiki: https://wiki.airraidsirens.net/Model_120

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