I have an original factory manual for one of these and it says, that at a distance of 100 ft. straight out from the housing of the siren, you will get 139 db. at full throttle of 3900 RPM. At the throat of the siren housing at the 3900 RPM you will get 142 db. to 146 db. at the 3900 RPM. They were also set up to rotate 360* or what ever the application was called for, such as maybe 45* to the left and then back to 60* right, or 90* to 90*, etc. It was safer to stand on the siren behind the sirens throat to help protect your hearing. Honestly, if you were one of the civic minded men that were designated to have to crank one of these up due to an actual attack, why worry about your hearing. You were going to be possibly obliterated in a few seconds anyway. This was by all means and still is, the best outdoor warning siren ever built by any USA company. The engineers that worked on and devised this siren were magnificently intelligent. This could not have been put together and made in a week. This was American technology at its pinnacle hay day. Is it any wonder that they were exposed to all extremes of weather and sun and ice, etc. yet they are still here to be taken care of by responsible people. Awesome indeed!!
Stead Fast That huge industrial capacity that provided lend lease material to USSR n the UK,and armed the USA in very short order went charging on post war leading the world.Now ,The Rust Belt.Shame.
Yo 142 DB? That's 2 DB above a jet engine less then 200 feet away from you. I'm no math guy. I just know 140 DB is a jet less than 200 feet away from you because Zoom said so in their explanation of what the microphones for their H5 handy recorder can take. But yo 146 DB? Now you need a true studio condencer for that. Meh too bad no one uses a pare of SE Electronics SE8 mics on this thing. Those mics can handel with the -20DB pads on 159 DB. So the SE8 mics again with the minus 20 DB pads on could more than handle these things. I hope those guys wore ear plugs. or those headphone looking things construction people have.
Not the best siren, but the most intimidating by a lot next to it’s thumderbolt counterpart. Also USA is the name of the place it was made in (correct me)
If you saw the Cold War siren at El Monte, then you've seen this siren. I recorded this before the siren was restored, repainted and mounted on a trailer. It now looks significantly different than it did during this test.
Yes, the pressures coming out of the trumpets are so high, when you're close to the siren you feel the sound more than you hear it. Still, I will make a new recording to capture the maximum pitch of machine. It's quite impressive.
This one has now now been fully restored and has been run as full speed. As soon as I make a new video, I will post it. Problem is it's so loud no recording really captures the sound properly.
What are you talking about? Many of these were operated by telephone in the 50:s. Don't compare a neglected 50 year old machine to a new one. This is an awesome and historically important piece of machinery.
Professionally restored and previously owned by a good friend of mine, Danny French from New Zealand. He is the guy operating it in the video. It was not part of the museums collection.
@Schutzraumtechnik999 I agree...these sirens give a wonderful, haunting sound when heard from a distance..I grew up in the san gabriel valley, and got to hear it once a month when they tested them....am so happy to see some of them being restored and fired up..
excellent!! thank heavens there are people out there restoring these wonderful sirens..what a shame so many are lost to rust and neglect.. do you know what happened to the siren located at the fire station on rosemead up by huntington?
If I win the Lotto I'm going to replicate the Chrysler Bell design but 1/3 larger and use a big block 454 Chevy engine to turn it. I can still hear the unit on top of Cerro Negro in La Canada near Glendale, Ca. after testing in the 1960's. I went up there to see it decaying on Christmas Day 2014. My big block unit would be mounted on a pickup truck....nice area denial device if needed.
Except that most hearing protectors remove maybe 30 to 50 decibels (from what I have seen on the market anyhow) So, estimate about 180 to 200 decibels by standing next to the thing, even with 50db reducing hearing protection, the sounds would still be right around the threshold of pain.
Something you could try (and I'm just winging it here) is get some cheap over-the-ear ear protectors, cup them around a small mic (like a lapel mic)-- 2 for stereo if you want-- and tape them shut. I can't imagine that there would be a very easy way to prevent that level of dB from punishing the diaphragm of any consumer-grade mic :)
I've been to that museum but I've never had a chance to actually check this siren out. Is it still running tests? I heard a siren this morning 0.0 .....
"...IS so high..." yeah. Oh yeah, I could see that--feeling it more than just hearing it! You wear ear protection, I hope! Could you do something for us, please? I have never, as of yet, seen what any of these look like with their stator opened and their chopper/stator set disassembled. I've always wondered what that looks like in that machine, because it looks like it might be different from the traditional shape. Could you show us all of that, please?
Yeah, because at that close a range, the audio will overdrive, huh? But at least we'd hear the full height of the pitch! And at least you don't need a phase converter for this! :D
This is almost on of the best videos on you tube. Soundtrack is great though could be cleaned up for better reproduction through a decent sound system. I'd take that not being an owner of one of these sirens.
You may want to have someone else record it at a distance of about 650 feet with a zoom camera and a professional recorder while you operate the siren. The Chrysler siren puts out 138 dBC at 100 feet and about 113 dBC at 1/8 of a mile (660 feet) if the horns are facing you at eye level. An SACD-quality professional recorder has a dynamic range of at least 115dB.
Wow it blanked out the microphone. Imagine if you had no ear protection and were standing next to it at full bore. Your ears would be destroyed. And if its strong enough. It could possibly stop your heart.
MaseFace71 McCulloch ... like most industrial engines the max power is developed at 3600 - 3800 rpm. I'm sure it will go higher but there's nothing to gain.
@@basedmax9029 ... well of course there will be a change in pitch but the compressor section has a range where it works best. (makes the most noise) Reading the specs I found on the web they run about 7 psi and 2600 cfm. At higher speed there may be cavitation where less air is moved so lower sound level. Also read the max speed was different for various engines. One was rated at 4600 rpm. If you want to hear a full test here ya go. ruclips.net/video/q5sPd9obwEU/видео.html
Ah thatt's only because they didn't really spinn the sucker up. But for good reason. It would cause panic. Don't know what permits or what ever you would need to have to fully floor the thing. There are vids where people do spinn it fully up and then yes it sounds like a giant sirenzilla. Like a giant 90s siren.
I have an original factory manual for one of these and it says, that at a distance of 100 ft. straight out from the housing of the siren, you will get 139 db. at full throttle of 3900 RPM. At the throat of the siren housing at the 3900 RPM you will get 142 db. to 146 db. at the 3900 RPM. They were also set up to rotate 360* or what ever the application was called for, such as maybe 45* to the left and then back to 60* right, or 90* to 90*, etc. It was safer to stand on the siren behind the sirens throat to help protect your hearing. Honestly, if you were one of the civic minded men that were designated to have to crank one of these up due to an actual attack, why worry about your hearing. You were going to be possibly obliterated in a few seconds anyway. This was by all means and still is, the best outdoor warning siren ever built by any USA company. The engineers that worked on and devised this siren were magnificently intelligent. This could not have been put together and made in a week. This was American technology at its pinnacle hay day. Is it any wonder that they were exposed to all extremes of weather and sun and ice, etc. yet they are still here to be taken care of by responsible people. Awesome indeed!!
Stead Fast That huge industrial capacity that provided lend lease material to USSR n the UK,and armed the USA in very short order went charging on post war leading the world.Now ,The Rust Belt.Shame.
Yo 142 DB? That's 2 DB above a jet engine less then 200 feet away from you. I'm no math guy. I just know 140 DB is a jet less than 200 feet away from you because Zoom said so in their explanation of what the microphones for their H5 handy recorder can take. But yo 146 DB? Now you need a true studio condencer for that. Meh too bad no one uses a pare of SE Electronics SE8 mics on this thing. Those mics can handel with the -20DB pads on 159 DB. So the SE8 mics again with the minus 20 DB pads on could more than handle these things. I hope those guys wore ear plugs. or those headphone looking things construction people have.
Not the best siren, but the most intimidating by a lot next to it’s thumderbolt counterpart. Also USA is the name of the place it was made in (correct me)
That manual must be DEAD WRONG because that thing got 138 TOPS
shame this was recorded with a potato
WHY DO I SEE YOU IN EVRY VIDEO I SEE!?!?!?!
The motor and siren both sound incredable!! Long live the Chrystler sirens!! Thank you for this video
Absolutely beautiful! I'm happy to see that there are so many "siren heads" on RUclips.
If you saw the Cold War siren at El Monte, then you've seen this siren. I recorded this before the siren was restored, repainted and mounted on a trailer. It now looks significantly different than it did during this test.
Yes, the pressures coming out of the trumpets are so high, when you're close to the siren you feel the sound more than you hear it. Still, I will make a new recording to capture the maximum pitch of machine. It's quite impressive.
This one has now now been fully restored and has been run as full speed. As soon as I make a new video, I will post it. Problem is it's so loud no recording really captures the sound properly.
What are you talking about? Many of these were operated by telephone in the 50:s. Don't compare a neglected 50 year old machine to a new one. This is an awesome and historically important piece of machinery.
Professionally restored and previously owned by a good friend of mine, Danny French from New Zealand. He is the guy operating it in the video. It was not part of the museums collection.
@Schutzraumtechnik999 I agree...these sirens give a wonderful, haunting sound when heard from a distance..I grew up in the san gabriel valley, and got to hear it once a month when they tested them....am so happy to see some of them being restored and fired up..
The loudest siren in the world
imagine being on top of a building housing said siren doing an unrelated task, and hearing said siren kick into life...."oh shit..."
I'm listening with bose headphones.. somehow I still almost felt that in my chest. Lol
because the crack out about 140 decibels (measured 100 feet away) the threshold of pain is something like 110 to 120 decibels
Wow sounds so cool. like a giant car thing.
I just like the engine lmao
It's called hitting the start button from a distance and/or indoors.
excellent!! thank heavens there are people out there restoring these wonderful sirens..what a shame so many are lost to rust and neglect.. do you know what happened to the siren located at the fire station on rosemead up by huntington?
@TheUban123 yes the siren is almost fully restored.its in running condition now
If I win the Lotto I'm going to replicate the Chrysler Bell design but 1/3 larger and use a big block 454 Chevy engine to turn it. I can still hear the unit on top of Cerro Negro in La Canada near Glendale, Ca. after testing in the 1960's. I went up there to see it decaying on Christmas Day 2014. My big block unit would be mounted on a pickup truck....nice area denial device if needed.
It’s the Chrysler dsesel air raid siren
Seems like it has thunderbolt-like squared horns
What happened to the 500t yesterday at the Fort McArthur.
Dude wtf i live in Pasadena and ive been to that museum but they dont have that siren on display. They only have an old Cold War siren
Except that most hearing protectors remove maybe 30 to 50 decibels (from what I have seen on the market anyhow) So, estimate about 180 to 200 decibels by standing next to the thing, even with 50db reducing hearing protection, the sounds would still be right around the threshold of pain.
@USEH567 they got new ones by the way takes like the push of a button then its on just like the tornadoe sirens
Something you could try (and I'm just winging it here) is get some cheap over-the-ear ear protectors, cup them around a small mic (like a lapel mic)-- 2 for stereo if you want-- and tape them shut. I can't imagine that there would be a very easy way to prevent that level of dB from punishing the diaphragm of any consumer-grade mic :)
is this going to be restored?
I want one so I can park it outside a friends house and sound it and say time to get up!!!
I've been to that museum but I've never had a chance to actually check this siren out. Is it still running tests? I heard a siren this morning 0.0 .....
Dang I love these. Good video.
Bloody hell Knobby THATS LOUD!
Does it have its blower?
"...IS so high..." yeah. Oh yeah, I could see that--feeling it more than just hearing it! You wear ear protection, I hope!
Could you do something for us, please? I have never, as of yet, seen what any of these look like with their stator opened and their chopper/stator set disassembled. I've always wondered what that looks like in that machine, because it looks like it might be different from the traditional shape. Could you show us all of that, please?
Yeah, because at that close a range, the audio will overdrive, huh? But at least we'd hear the full height of the pitch!
And at least you don't need a phase converter for this! :D
also per the civil defense manual 8 seconds full power 4 off, then repeat.
It almost sounds like a detroit diesel when the siren is going slow.
Well, explain how someone would ever have operated one at full speed then, mmm-kay?
This is almost on of the best videos on you tube. Soundtrack is great though could be cleaned up for better reproduction through a decent sound system. I'd take that not being an owner of one of these sirens.
almost ultrasonic
THIS SIREN PEAKS AT 138 dB! LIKE SO ALL CAN SEE
You may want to have someone else record it at a distance of about 650 feet with a zoom camera and a professional recorder while you operate the siren. The Chrysler siren puts out 138 dBC at 100 feet and about 113 dBC at 1/8 of a mile (660 feet) if the horns are facing you at eye level. An SACD-quality professional recorder has a dynamic range of at least 115dB.
Not a lot of neighbors close by to complain, I take it? :)
I would like to connect it to a jet engine. Then we shall hear loud.
+David Vermillion more like 9001 jet engines!
+David Vermillion and you would destroy it; too many RPM's for that siren to handle, besides he wasn't at complete full speed for obvious reasons...
Jon Homrich Then we will build a replica made of stronger parts.
Wow it blanked out the microphone. Imagine if you had no ear protection and were standing next to it at full bore. Your ears would be destroyed. And if its strong enough. It could possibly stop your heart.
Gosh dang it! How come nobody who has one of these will ever wind it up ALL THE WAY?
Maxx Fordham! Because it's so loud it's dangerous
guys from ww2 would freak out
Can You Hear Me, Now?
sounds like a plane
my speakers almost broke!
you need to wind that bad boy up to 4600 rpm. wear hearing protection though....
YESSSSSSSSSS!!!! FULL SPEED!!!!!!!!!!!!!!!!!!!!! }:D
Max rpm? I know people who used to operate these things
MaseFace71 McCulloch
... like most industrial engines the max power is developed at 3600 - 3800 rpm. I'm sure it will go higher but there's nothing to gain.
Of course there is it’s a siren haha
If it’s a test then they should test the whole thing (subjective)
@@basedmax9029 ... well of course there will be a change in pitch but the compressor section has a range where it works best. (makes the most noise) Reading the specs I found on the web they run about 7 psi and 2600 cfm. At higher speed there may be cavitation where less air is moved so lower sound level. Also read the max speed was different for various engines. One was rated at 4600 rpm. If you want to hear a full test here ya go. ruclips.net/video/q5sPd9obwEU/видео.html
It sounds like a Honda
Jet engine sound or something!?
What did u say?!
can u hear me now? good
Chrysler air raid siren
,...Wonder how good the engine would do in a car :)
They took the engine out of a pickup instead and stuffed it in the siren. Wanna know? Drive a 1950s Chrysler
Where is the air intake?
Right where the drive shaft connects to the main body. There is a 2 stage blower on the inside.
Wow cool
At 1:42, where the clutch connects to the first stage impeller.
Godd chyrsler siren
Where is the air intake
At 1:42, where the clutch connects to the first stage impeller.
Так и хочется кинуть чем-нибудь тяжелым в эту машину!
No siren sound to me. Just a loud whoopee cushion.
Ah thatt's only because they didn't really spinn the sucker up. But for good reason. It would cause panic. Don't know what permits or what ever you would need to have to fully floor the thing. There are vids where people do spinn it fully up and then yes it sounds like a giant sirenzilla. Like a giant 90s siren.
the sounds like Gt car
it sonds like a rase car
Ummm, they're motor driven and likely had a remote electric start. That would be the LOGICAL thing wouldn't it?
Taodagdataomon