Extremely rare Jyri siren activated | Siren test @ Olkiluoto nuclear power plant, Eurajoki, Finland
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- Опубликовано: 20 окт 2024
- Filmed on July 3rd, 2023/ 3.7.2023
You may have seen another video of this siren on my other channel but I decided to upload it here for those who don't know that channel.
Special thanks to @jessetujula , @sirenvzaw1860 and @zirenfin for their cooperation in the research regarding these sirens.
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This one sounds really mean. Almost like a slow-running Pintsch-Bamag or early Hörmann HLS. Really like the sound.
If STL-10s were pneumatic sirens:
lol
Closest we get to hearing a model 120.
Also can the siren be viewed in google street view
Correction 0:33 / 0:34
Hearing that same sound now in Florida. It was strange like a plane falling from the sky
Almost sounds like the chopper speed is manually being adjusted with a knob
Great video! I would like to learn more about Finland's sirens, is there a Finland siren map?
Yeah!
How does that siren work? Is it pneumatic? The wind down sounds very odd
It works with high pressure air. The siren motor appears to be speed controlled with electronics to achieve longer wind down, but no one really knows the details of this siren so can't say why they did that.
From what I understand, these are basically a hybrid between a Thunderbolt and an HLS siren since it's omnidirectional with a 24VDC motor connected to a speed controller driving the chopper and uses some blower forcing air into the head. It's hard to tell what type of blower it uses. Its tone is choppy like it's being fed with a giant roots blower running at a slow speed, like a low-pitched Thunderbolt 1000 with a 6M roots blower. Then again, different chopper designs can produce a similar tonality, and if that's the case with this siren, it may use a centrifugal blower. Those blowers deliver a smooth air stream since they aren't able to positively displace the air like a roots blower, which is why the Chrysler siren sounds so smooth even though it is a pneumatic siren.
@@DJ2226It's also to the Model 120 as well. the peak pitch and the undertone (buzzing "rrrr") is pretty much spot on with it, albeit the 120 having a centrifugal 10 Hp blower and 2 Hp chopper.
@@Duderocks5539yeah it sounds like the 5 port version of the Model 120. I think this also has 8 horns but I am not sure
@@Duderocks5539so this is how the 5 port model 120’s would of sound like?
What a 5 port Model 120 would sound like…
A model 120 is 5 port
@@kansasclocksandsirensThe original is 4 port
STL 10 (Finland Editon)
Make it pneumatic ;)
More like Model 120 Finland Edition.
@@Duderocks5539 "STL Model 120 Doesn't exist"
STL Model 120:
Why is it so quiet?
Edit: i think i know what siren this is... a prototype Hörmann HLS 273
In real life this siren was actually pretty loud and powerful, you just can't hear and feel it through video.
Also this is a completely different siren than the Hörmann HLS 273, this siren was designed by University of Oulu, Finland in the late 1970's.
@@FinSirens oh okay thanks!
Do you have a map for every siren in finland?
I looked at this and thought it was an STL-10! That sounds so scary. Was it really loud?
The distance is about 750meters, and you can clearly hear the chopper wind down ;)
@@zirenfinyou could hear the chopper wind down bc it is a pneumatic siren lmfao. All Thunderbolts and HLSs do that too so just bc u heard the wind down clearly doesn’t mean it is super loud. Yes, it is obviously gonna be loud from that distance bc it is still pretty close but won’t be extremely loud. Still might rattle your body tho
@@SirensAndAlarmsOfNorthernIL JYRIs auditory radius is said to be easily over 2km, which is around the same as HLSs, and it beats all the other sirens in Finland. I'd say thats "super " loud.
@@zirenfin 2km? that’s just a tad bit over a mile lmfao. Whelen omnidirectional electronic sirens carry way more than that as those can easily be heard further than 3 miles and are up to 128dB at the 100 feet. I can easily hear Whelens anywhere within a 3-5 mile radius INSIDE my house. So it’s not “super loud” compared to other sirens at all. Yeah it is loud, but based on how far it’s heard it’s probably only about as loud as an ACA Banshee so about 115dB at 100 feet. Iirc that is how loud the HLS is also. If so then I am not surprised why they replace them besides the fact they need more maintenance than today’s sirens. Also I wouldn’t say it is louder than EVERY siren in Finland bc there’s Whelens there too which are louder than HLSs
@@SirensAndAlarmsOfNorthernIL 2km is the guaranteed radius offered by the manufacturer. The guaranteed radius for a Hörmann F71 is 2.5km. You can think the guaranteed radius is a MINIMUM distance it will cover no matter what. The radius for a more modern siren in Finland, for example the Instoma AHV-2000D, is around 1km said by the manufacturer, yet you can easily hear them over 4km (2.5miles) away.
Of course it's possible to hear the siren further if the weather conditions allow it. Thats common sense. Even a "low power" siren like the E57 can be heard over 4 miles away IF the weather conditons allow it.
In the 80s - 90s there was a JYRI installed ontop of a fire station in Iisalmi. They had to remove it because it was way too powerfull for a location in the middle of the city. They even had to empty the station of people, because people cound not be indoors due to the sirens power... :D
And the whelens..The radius for WPS2805 is said to be barely 3km (1.85miles) at 70db lol. They barely cover 500m (0.3 miles) and are almost impossible to notice over the busy Helsinki. 😁🤣
0:12 siren starts
0:15wait
sings model 120
E.d bullard siren in finland
Siren type?
It's called the Jyri siren apparently.
Skurrile Tieftonsirene 😎👍
0:35 / 0:36 WHY IS HE FARTING !!!?!??
The square stl 10
veryyy odd sounding STL-10 like siren
its pneumatic
stl-8
Socal wannabe
toshiba siren
No
Nope