Now then Matt, my siren knowledge is not quite what it should be! With that in mind, may I ask a question? These sirens are tested at regular intervals, but apart from yourself I don't see any other individuals or engineers/personnel monitoring the actual output of the siren...? Is all the testing done remotely via telecoms, or do they rely on information from locals to let them know the siren is working as it should? Judging by the state of this grand old specimen, I can't imagine an engineer has been present during testing for many a year?!
I would go record more sirens.... But sadly THERE ARE NO SIRENS AROUND HERE in Florida. Might be able to catch Mobile, AL's siren test though if im lucky/
@@2002_bugeyewrx oiling the insides of the motor is generally frowned upon. Has a habit of gathering gunk and turning it in to a nice abrasive paste that makes things wear about six times as fast.
Wow, is all I can say to that! Judging by the clunks from the control box as it starts, I would say it must be on a star/delta starter, which is taking too long to switch over from star to delta, hence the sudden increase to the full speed at 50Hz. The noise is of that siren is simply unmatched from any others I've heard.
Alex Smith not only that, but I think the paint is flaking on the rotor and rubbing on the housing, just to upset any current monitoring circuit in the star/delta change over circuit!
Still working great! When i filmed this its only slightly lower pitch but only a really little bit but it is still working great. It actually does shake the ground I went and it was shaking under me. Thank you for this video and the siren map in desc and if it were not for this video I would not know where all of these UK sirens are and would not have seen Ravenstruther keep the good work up! 😁👍
If you wanna hear a loud siren, try to look for a Chrysler air raid siren in America, it can generate 138 decibels... across a 100 ft! It's literally the loudest siren in the world.
EthanPlayz Minecraft i mean, when it comes to stuff like that. We really don’t know. But object have boy names too. The steam locomotive “The Big Boy” goes by he for an example.
JONUTHIN'S LAWNCARE AND CONSTRUCTION INC what are you talking about? Unless the siren is broken or sick no matter if it is dual tone or single tone it should sound healthy. This siren is definitely sick and it needs servicing.
Regarding the comments about bad bearings, on dismantling my GP12, there was major aluminium corrosion between the back of the rotor housing and the motor, resulting in serious friction on the rotors themselves as the housings had bulged inwards at the centres. This could be the actual problem.
Heh, "Ravenstruther" pronunciation trips many people up. It's actually pronounced as "Renstree" or "Reinstree", which is totally counterintuitive I know.
Oh my goodness... NEVER would have realised that! Its really annoying as I always like my videos to be as accurate as I can be, and getting pronunciation right is very important in my eyes. Unfortunately it's a little late for this video :/ Thanks for the info though... might put this in the video description later.
I think the reason why the siren sounds two speed is because those rotor heater boxes look shorted, and if the heaters run it might effect the motor speed because they are shorting
If I remember correctly, I think this siren is louder than the hour bell Big Ben in London. I think I heard that when it’s first struck, it gets as loud as a plane taking off (136db)
Any chance you could make a video on the Crowthorne broadmoore siren? It’s the last one standing, would be nice to hear it one last time before it’s axed soon. Shame I don’t live near it anymore lol
Hi. If this is the Crowthorne Statio siren you are referring to then unfortunately I don't think it works anymore. Someone went to film it about 1 to 2 months ago and it didn't sound. The only one that I know still works is the main hospital one. All the rest that remain are unknown, but I think gone are the times where you can go and film these and expect them to work. In fact its the opposite... probably expect them NOT to work. Same with other locations... Wokingham London Road, Skate Park and Crowthorne Stn - people have already been to film them recently and they didnt work.
mrmattandmrchay According to broadmoors website crowthorne is the only one that’s ‘Ment’ to work. Apparently it went of in April due to a lighting storm aswell lol
according to another comment this thing is run on a star/delta starter which is taking way too long to switch from star to delta during operation. this is why it runs up to full speed for only around 5 seconds. its around 25 seconds on star and 5 seconds on delta.
the way a siren works is by forcing air out of a specifically sized hole at a fast speed. the closer the rotor is to the stator, the more air is forces through the ports, and the louder the siren is. seeing how the rotors are literally clipping the stator, it makes sense the ground is shaking. also, how ironic, the newer siren is in worse condition than an older siren! like, a lot of them.
Think this must be the one you hear in GothicGman's Carstairs siren video 😁 for those who haven't seen it, go check it out! Always loved how it hauntingly stays low then suddenly perks up 😍 great to hear it close up! 🔊
In my opinion, the reason why it changes speed *could* be due to star-delta starting of the motor. Being a much bigger and more powerful siren than the CS8, it could need to start itself in star mode to have enough torque, then switch to delta to get higher speed. Either this or rather than having shutters like the CS8, this model switches speed to change tone, either way it's definitely some kind of electrical change rather than mechanical.
I don't know if somebody already said that, bit imho the "Two Speeds" of the siren are caused by a faulty star-delta timer (normally used to limit inrush current on start-up)
Glad we finally got to hear the siren Matt. Btw I found out where the one at The State Hospital is. Not visible from the road, as it's well within the grounds
Definitely a star-delta switcher there, a very very late changeover though! Usually these contactors are pretty quick, possibly the capacitors are needing a little check up :)
I was in the RAF and every base still has these. They are used to call us in at ANY TIME for war excercises and i do mean ANY TIME usually about 3 am as the neighbours are ALL military so no one can complain 😂😂
Chay did his work experience at RAF naphill. I noticed a very old looking siren at the end of the security office before you enter. Dark green motorised siren in a cage. Really wanted to get a photo of it but probably wasn't wise to do so!
Putting "140 dB" in the thumbnail is very misleading. When talking about dB ratings for sirens it's typically from 100 feet. So just to clarify for those who need it: There are much louder sirens than this. The loudest in the world still being the Chrysler Air Raid Siren.
@@cyanoticspore676 the original design sort of did. The later design which was mass-produced and installed all over the country was radio controlled. (They could still be manually operated too, if needed.)
Need to listen to the Chrysler powered siren used during the Cold War in the United States. You know it’s loud when you use a 331 cubic inch HEMI engine to run the siren lol
140-150 dB that is insanely loud. It could damage your hearing if stand too close to it. I don’t know how long a safe exposure time would be. I’ve heard that such sound levels could pierce your ear drums.
I am having a hard time swallowing 140db... The chrysler bell victory siren is 138 and it is the loudest siren ever made... Search it out on youtube...powered by a v8 gasoline engine and can be heard for 30 miles.
@@grandinosour It's 138 db at 100 ft. At one meter it's 173 db. Have a look at my video of me setting one off: th-cam.com/video/3NIApYjC1YU/w-d-xo.html
@@grandinosour Also, the Chrysler Bell Victory Siren is an earlier variant which was 137 db at 100 ft. It had a 2 stage compressor and slotted disc made by Bell Telephone Laboratories (hence the name Chrysler BELL Victory Siren). It was powered by a 160 hp Chrysler Industrial 30 Flat 6 engine. This model was produced from 1942 to 1952. The model you are thinking of is the later variant, simply called "Chrysler Air Raid Siren". That's the one in my video. It has a 3 stage compressor and a slotted disc made by American Blower Corp. It was powered by a 180 hp Chrysler Firepower Model 20A V8 hemi engine. This model is the one that produces 138 db @ 100 ft and can be heard about 15-20 miles on average, but has been heard over 40 miles! This model was made from 1952 to 1957. We got word that the one I helped set off was heard over 25 miles away in Catalina Island.
Hiya! Sony Cybershot HX80 - 30x zoom! Quite an old camera now (does 1080p though). Was perfect for siren filming, definitely need a tripod though, can't really walk around with it.
Hi Ollie. These are only for escapees, or they officially call it "persons unaccounted for" meaning they're missing and possibly escaped. Only for the hospital use.
The motor is going from star to delta. The timing of the contactors is a bit out. Normally full speed happens at about 4 to 6 seconds after start up. The three phase motor windings are basically switched between 230 and 400 Volts on the motor windings, hence increase in speed as the torque is improved.
The star delta timing is out a bit. Should be about 5 seconds on star. Still an awesome sound. The siren can do with a new paint job. Also, a bit of rubbing of the rotor, most likely corrosion. Great you are documenting these beauties.
@@donaldduck2855 gotta hand it to you. I thought that the loudest siren was still the Chrysler-Bell Victory Siren at 138 decibels. After doing my research, this has a top at 145 decibels. I still think other sirens are cooler though, no matter how loud they are.
Hi - I'm currently making a video about WW2 sirens in service today and I'd like permission to clips from some of your siren videos. In return I will fully credit your videos and provide a link to your channel for my 660,000 subscribers to click through to. Do you agree?
What this siren needs: 1.A chopper cleaning 2.A new Chopper warmer cap Not required stuff: A new paint job What I recommend: the chopper motor of a 10v 2T or 15 V2 t
Some people say its the star then delta configuration. Star connects motor electromagnets for "power" to get motor running, then "delta" is for continuous running. Thing is... should be 2-5 seconds apart.
Wow! I don't think the locals shooting at it has helped it... the missing junction box cover bodes ill for adequate contact too. A new set of bearings wouldn't go amiss either judging by how quickly the rotor stopped and how my mechanical sympathy itched in time with that hissing. However, all that would spoil this EPIC siren! Excellent capture, old chap.
THANKS TO EVERYONE that attended the Premiere - it was the best yet!! :) :) Please check out video description at the bottom.
Now then Matt, my siren knowledge is not quite what it should be!
With that in mind, may I ask a question?
These sirens are tested at regular intervals, but apart from yourself I don't see any other individuals or engineers/personnel monitoring the actual output of the siren...?
Is all the testing done remotely via telecoms, or do they rely on information from locals to let them know the siren is working as it should?
Judging by the state of this grand old specimen, I can't imagine an engineer has been present during testing for many a year?!
It was really fun
Sadly I missed the premiere, but was lucky enough to catch the video no less than an hour after going live!
I would go record more sirens.... But sadly
THERE ARE NO SIRENS AROUND HERE in Florida.
Might be able to catch Mobile, AL's siren test though if im lucky/
Where is the Lanark video?
There's such a fun, relaxing playground for children nearby.
I can understand why no one's playing there at this time of day.
Bjorn Roesbeke
I would play there
Lol yes
My old Kindergarten had a German DS977 siren on top. Every time it went off it got amplified by all the kids crying 😂
"Where the locals drive their red cars backwards"
I don't know why but I find that funny
Ouch! Sounds like this old brute needs some oil in the bearings!
Yeah man... You can hear the Motor Scrathching the stator
@@2002_bugeyewrx oiling the insides of the motor is generally frowned upon. Has a habit of gathering gunk and turning it in to a nice abrasive paste that makes things wear about six times as fast.
@@TheMatthooks Yea, lithium grease tends to be better
I think they should replace it
No Need For Oil Because This Thing Wouldn't Be As Loud As It Is Right Now
I live here, and it goes off every second Thursday, the only time you know it's One o'clock! It's set to go off if we are at war as well!
Does it still exist?
This siren needs a Service! Nice video!
Badly
Not really
@@wolfblade5949 yes rlly
@@wolfblade5949 I think it does, you can hear the unpleasant scratch from it.
Wow, is all I can say to that! Judging by the clunks from the control box as it starts, I would say it must be on a star/delta starter, which is taking too long to switch over from star to delta, hence the sudden increase to the full speed at 50Hz. The noise is of that siren is simply unmatched from any others I've heard.
Alex Smith not only that, but I think the paint is flaking on the rotor and rubbing on the housing, just to upset any current monitoring circuit in the star/delta change over circuit!
About 25 seconds on Star and 5 on Delta. The timing is pretty bad.
Still working great! When i filmed this its only slightly lower pitch but only a really little bit but it is still working great. It actually does shake the ground I went and it was shaking under me. Thank you for this video and the siren map in desc and if it were not for this video I would not know where all of these UK sirens are and would not have seen Ravenstruther keep the good work up! 😁👍
What's even more haunting the the fact that there's a system of emergency sirens for escaped mental patients lol
If you wanna hear a loud siren, try to look for a Chrysler air raid siren in America, it can generate 138 decibels... across a 100 ft! It's literally the loudest siren in the world.
Man she sounds and shows her age! Beautiful siren!
Why is every object people talk about always have to be a girl
EthanPlayz Minecraft i mean, when it comes to stuff like that. We really don’t know. But object have boy names too. The steam locomotive “The Big Boy” goes by he for an example.
EthanPlayz Minecraft because the object is a beauty
Dear god, that thing doesn't sound healthy lol. Also, just look at the state of the heater connection box never mind the rest of it..!
It's a 2-speed dualtone siren dual tone sirens never sound healthy
JONUTHIN'S LAWNCARE AND CONSTRUCTION INC what are you talking about? Unless the siren is broken or sick no matter if it is dual tone or single tone it should sound healthy. This siren is definitely sick and it needs servicing.
2:00 when vtec kicks in
Sosig TH-cam
And it sounds glorious
...
On these secomak GP12’s the first speed is “star” and then when it kicks up to the max speed it’s called “delta”.
13:20 Submarine diving alarm.
Facts
Regarding the comments about bad bearings, on dismantling my GP12, there was major aluminium corrosion between the back of the rotor housing and the motor, resulting in serious friction on the rotors themselves as the housings had bulged inwards at the centres. This could be the actual problem.
nice suspense of a siren sounding.nice touch to a video we have all been waiting for
This dude litterally speedran sirens just for us!!! Thank you!!!
Non-siren enthusiasts: best siren ever super healthy.
Siren enthusiasts: she needs some oil and a restoration, but she be lookin pretty good.
Heh, "Ravenstruther" pronunciation trips many people up. It's actually pronounced as "Renstree" or "Reinstree", which is totally counterintuitive I know.
Oh my goodness... NEVER would have realised that! Its really annoying as I always like my videos to be as accurate as I can be, and getting pronunciation right is very important in my eyes. Unfortunately it's a little late for this video :/ Thanks for the info though... might put this in the video description later.
Looked it up- Reinstree is the Scots spelling, hence the odd pronunciation.
I’ve lived there all my life (39 years) and people’s ideas of how to pronounce it is hilarious ravenstrooother 😂. Kimberly is right.
it sounds like a german tank
'hans, get the ravenstruther'
Mmm, na
I think the reason why the siren sounds two speed is because those rotor heater boxes look shorted, and if the heaters run it might effect the motor speed because they are shorting
Whaaa...?
There is no way that siren is 140 db...
quite possible that close
at 100ft, no.
Considering the loudest siren ever produced ( the Chrysler Air Raid Siren)cranked out 138 db
Possibly 120 dB
If its a GP12 then it's 115 @ 100.
2:58 when I get hyper on sugar
And then you crash
@Liam Waldrup loooooooooooooooooooooooooooooooooooooooooooooooooooooool
That is truly beautiful and spectacular!
Yeah
If I remember correctly, I think this siren is louder than the hour bell Big Ben in London. I think I heard that when it’s first struck, it gets as loud as a plane taking off (136db)
That's as loud as an ACA P-50.
Any chance you could make a video on the Crowthorne broadmoore siren? It’s the last one standing, would be nice to hear it one last time before it’s axed soon. Shame I don’t live near it anymore lol
Hi. If this is the Crowthorne Statio siren you are referring to then unfortunately I don't think it works anymore. Someone went to film it about 1 to 2 months ago and it didn't sound. The only one that I know still works is the main hospital one. All the rest that remain are unknown, but I think gone are the times where you can go and film these and expect them to work. In fact its the opposite... probably expect them NOT to work. Same with other locations... Wokingham London Road, Skate Park and Crowthorne Stn - people have already been to film them recently and they didnt work.
mrmattandmrchay According to broadmoors website crowthorne is the only one that’s ‘Ment’ to work. Apparently it went of in April due to a lighting storm aswell lol
mrmattandmrchay thanks for the reply :)
@@aedanjharvey1868 Correct! Siren G does still work, albeit a bit badly. Got to go on Monday and see if it's the end!
according to another comment this thing is run on a star/delta starter which is taking way too long to switch from star to delta during operation. this is why it runs up to full speed for only around 5 seconds. its around 25 seconds on star and 5 seconds on delta.
0:20 how did you get that map?
This siren is beautiful!
the way a siren works is by forcing air out of a specifically sized hole at a fast speed. the closer the rotor is to the stator, the more air is forces through the ports, and the louder the siren is. seeing how the rotors are literally clipping the stator, it makes sense the ground is shaking.
also, how ironic, the newer siren is in worse condition than an older siren! like, a lot of them.
Think this must be the one you hear in GothicGman's Carstairs siren video 😁 for those who haven't seen it, go check it out! Always loved how it hauntingly stays low then suddenly perks up 😍 great to hear it close up! 🔊
I reckon it is. I reckon you hear this and a couple of distant CS8s!
@@yeongsuma Cool 👍I'll go back and listen out for them too 😁🔊
That's a GP12. I have one just like it. They are much larger and louder than a Castle Castings siren.
So how does it work they just press a button and all the sirens automatically come on ?
In my opinion, the reason why it changes speed *could* be due to star-delta starting of the motor. Being a much bigger and more powerful siren than the CS8, it could need to start itself in star mode to have enough torque, then switch to delta to get higher speed.
Either this or rather than having shutters like the CS8, this model switches speed to change tone, either way it's definitely some kind of electrical change rather than mechanical.
I don't know if somebody already said that, bit imho the "Two Speeds" of the siren are caused by a faulty star-delta timer (normally used to limit inrush current on start-up)
Glad we finally got to hear the siren Matt.
Btw I found out where the one at The State Hospital is.
Not visible from the road, as it's well within the grounds
I’ve always wanted to know where it was! I spent ages looking it up and using google earth
Go onto OS Maps & type this Grid Ref in: NS 96081 45830.
That should come up with the most likely location for the siren.
Thanks
That’s an awesomely weird sound! Sorry to miss the premiere - opera booked before this was scheduled - same sort of thing though ;-)
Wow what a sound although definitely needs some oil on the bearings, sounds like the star delta circuit might need some attention as well
It's taking a good 20 seconds for it to kick into delta
What make is this siren? It looks and sounds different to the Other sirens or even Air raid sirens in general.
Secomak GP12 I believe!
When you combine miles and meters. Mesure.
What's with the changing of speed when the siren shuts down?
When It Runs At Two Speeds It's Very Amazing
You deserve more subs.
I don't think it's 140db, that's 9db lower than the Chrysler siren at full speed. Were you wearing hearing protection?
Definitely a star-delta switcher there, a very very late changeover though! Usually these contactors are pretty quick, possibly the capacitors are needing a little check up :)
Agreed. Cant really say too much though given its age! I'm wondering if it has a sense bulb for the switchover command...
That is such an EPIC sound!!!
I love it!
How do they activate these sirens? Via telephone line or radio activation?
Telephone 🔊
There must be a few decibels added to it with the sound of the metal scraping.
¿Which siren is More Louder than the Chrysler siren?
i love the go pro 7 black audio u should do a siren test of one of these sirens with only this view ad timer
I was in the RAF and every base still has these. They are used to call us in at ANY TIME for war excercises and i do mean ANY TIME usually about 3 am as the neighbours are ALL military so no one can complain 😂😂
Chay did his work experience at RAF naphill. I noticed a very old looking siren at the end of the security office before you enter. Dark green motorised siren in a cage. Really wanted to get a photo of it but probably wasn't wise to do so!
Putting "140 dB" in the thumbnail is very misleading. When talking about dB ratings for sirens it's typically from 100 feet.
So just to clarify for those who need it: There are much louder sirens than this. The loudest in the world still being the Chrysler Air Raid Siren.
Isn't that the one that's so big it has a cockpit
@@cyanoticspore676 the original design sort of did. The later design which was mass-produced and installed all over the country was radio controlled. (They could still be manually operated too, if needed.)
Need to listen to the Chrysler powered siren used during the Cold War in the United States. You know it’s loud when you use a 331 cubic inch HEMI engine to run the siren lol
Does the siren do a different tone for escapes
Or the same tone as now
You should definitely record some sirens from the Rampton Hospital system!
140-150 dB that is insanely loud. It could damage your hearing if stand too close to it. I don’t know how long a safe exposure time would be. I’ve heard that such sound levels could pierce your ear drums.
140 at 1 meter.
I am having a hard time swallowing 140db...
The chrysler bell victory siren is 138 and it is the loudest siren ever made...
Search it out on youtube...powered by a v8 gasoline engine and can be heard for 30 miles.
@@grandinosour It's 138 db at 100 ft. At one meter it's 173 db. Have a look at my video of me setting one off: th-cam.com/video/3NIApYjC1YU/w-d-xo.html
@@grandinosour Also, the Chrysler Bell Victory Siren is an earlier variant which was 137 db at 100 ft. It had a 2 stage compressor and slotted disc made by Bell Telephone Laboratories (hence the name Chrysler BELL Victory Siren). It was powered by a 160 hp Chrysler Industrial 30 Flat 6 engine. This model was produced from 1942 to 1952. The model you are thinking of is the later variant, simply called "Chrysler Air Raid Siren". That's the one in my video. It has a 3 stage compressor and a slotted disc made by American Blower Corp. It was powered by a 180 hp Chrysler Firepower Model 20A V8 hemi engine. This model is the one that produces 138 db @ 100 ft and can be heard about 15-20 miles on average, but has been heard over 40 miles! This model was made from 1952 to 1957. We got word that the one I helped set off was heard over 25 miles away in Catalina Island.
This Siren Melted My Tablet
im guessing this siren was also used during WW2?
0:35 wow what is that camera, it zooms super far! 🤩
Hiya! Sony Cybershot HX80 - 30x zoom! Quite an old camera now (does 1080p though). Was perfect for siren filming, definitely need a tripod though, can't really walk around with it.
Does ravenstruther use the siren for emergency
Hi Ollie. These are only for escapees, or they officially call it "persons unaccounted for" meaning they're missing and possibly escaped. Only for the hospital use.
It sounds as if the 2 speed issue might be a problem with a soft start system. Perhaps a sticking contactor.
Why the motor speed increases before run down?
The motor is going from star to delta. The timing of the contactors is a bit out. Normally full speed happens at about 4 to 6 seconds after start up. The three phase motor windings are basically switched between 230 and 400 Volts on the motor windings, hence increase in speed as the torque is improved.
Siren H has no dampers but ones with dampers that do hi lo signal is like thunderbolt 1003
Must be terrible if you're working Nightshift sleeping in the day.
Why do we have airade sirens for storms?
Do you know who manufactured this bad boy?
Sekomack
how is that 140db?
So if you stand in the right place - your eyes blur.
Yes
I would like to buy one of these and import it to America and put a 60 hertz motor on it
A variable frequency drive would sort you out :)
You wouldn’t need a 60hz. motor. Just the correct voltage.
It will sound like an XT22.
So has your hearing returned to normal yet?
LOL
Do either of the other GP12's have the two speed start? (my guess is a star/delta starter is being used)
Do you wear hearing protection? It's loud enough to be a problem even for short durations if you are close enough!
It’s low pitch cause the bearings are shot and the chopper is rubbing against the housing
That thing must bother the cows like mad!
The star delta timing is out a bit. Should be about 5 seconds on star. Still an awesome sound. The siren can do with a new paint job. Also, a bit of rubbing of the rotor, most likely corrosion. Great you are documenting these beauties.
What siren is it?
That’s smaller looking than what we have in the U.S.
This Is The Most Epic Siren I've Ever Heard In My Life
Search up a video of a Thunderbolt 1003 and report back lol.
Them Thunderbolts Can't Top 140 Decibels While THIS Does LOL
@@donaldduck2855 gotta hand it to you. I thought that the loudest siren was still the Chrysler-Bell Victory Siren at 138 decibels. After doing my research, this has a top at 145 decibels. I still think other sirens are cooler though, no matter how loud they are.
Chrysler Sirens Might Be Jealous That They Don't Have A 2 Speed Motor LOL
@@yaman1776 definitely
I'll Try To Buy One Of These And Turn It Into A CS8
what song is at the intro.i want it so badly in a link on youtube please
That is one slow star-delta starter.
timer on the star delta switch over needs adjusting.
yes, I guess so
No Wonder Why Nobody Wants Somebody To Escape
How do the people communicate to it to tell it to activate?
I think this one will be via phone line.
@@RediffusionMusic So they just ring up the siren and push numbers to activate it?
@@coshiro1 similar, I believe.
what is up with the two speed thing?\
@James Wheeler ok
@James Wheeler I thought it was the rotor heaters
Uploaded on my b-day aswell:)
That siren is a fast stopper.
Let’s se what this is
It strange how this siren is sounding is goes on a lower pitch first the goes to its normal sounding pitch is strange to me.
She got also defrost heater plate!
The delta starter seems to be acting up
Other than that this sounds great
Hi - I'm currently making a video about WW2 sirens in service today and I'd like permission to clips from some of your siren videos. In return I will fully credit your videos and provide a link to your channel for my 660,000 subscribers to click through to. Do you agree?
140db would make it the loudest siren ever.
What this siren needs:
1.A chopper cleaning
2.A new Chopper warmer cap
Not required stuff:
A new paint job
What I recommend:
the chopper motor of a 10v 2T or
15 V2 t
Use this for nearing time limit in billiard matches.
What the hell’s the deal with that last second ramp up to full speed
Some people say its the star then delta configuration. Star connects motor electromagnets for "power" to get motor running, then "delta" is for continuous running. Thing is... should be 2-5 seconds apart.
Reminds me of the THX logo Sound check before the Movie
Hit like if Scared the hell out of you when u were a kid.
The rotor sounds a bit rough
Sounds like bad bearings! But is EPIC!
Yes it slows down so quickly as well, definitely worn bearings!
Wow! I don't think the locals shooting at it has helped it... the missing junction box cover bodes ill for adequate contact too. A new set of bearings wouldn't go amiss either judging by how quickly the rotor stopped and how my mechanical sympathy itched in time with that hissing. However, all that would spoil this EPIC siren! Excellent capture, old chap.