try and find this one out.

[thunderbeam63]

Alright first go to you tube,then look up"Hochleistungssirene Probealarm"then click "search videos"


Does'nt that sound kind of weird

[loudmouth]

sound weird yes. sound awsome yes! i have a big place in my heart for HLS sirens its a comprsed are siren not like the T-bolt becuse this used air compred ad 15,000 psi or some thing like that. i cant rember the link off the top of my head but that video was awsome never knew they could make sounds like that. nice find !!!

[thunderbeam63]

Thank You very much.

[SirenMadness]

It sounds like that because the air is not being delivered to the chopper at the wind-down. This is so because they want the siren to waste less air while doing an attack-signal. After all, an attack-signal can just as easily be noticed by a drop in sound itself as a drop in frequency of the sound.

[Jim_Ferer]

If you look at this website:

http://www.hochleistungssirene.de/index.php?do=funktion

There's some great picitures of the works of this siren. One of them is of a pressure guage showing 7 bar of pressure, which is about 100.5 psi.

It seems like a lot of machinery and material for one siren, though, although the Germans are famous for never making anything with 20 parts when you can use 100.

[thunderbeam63]

If you look at this website:

http://www.hochleistungssirene.de/index.php?do=funktion

There's some great picitures of the works of this siren. One of them is of a pressure guage showing 7 bar of pressure, which is about 100.5 psi.

It seems like a lot of machinery and material for one siren, though, although the Germans are famous for never making anything with 20 parts when you can use 100.

thanks for sharing that.that thing is HUGE

[loudmouth]

that person allso took some videos of the E57 i hope he had some ear protection on http://www.youtube.com/watch?v=aqtvxppokIQ neat video tho!

[thunderbeam63]

that person allso took some videos of the E57 i hope he had some ear protection on http://www.youtube.com/watch?v=aqtvxppokIQ neat video tho!

No kidding

[Nelso90]

The HLS 573, a newer version of the 273, uses a 6-stage air compressor (I think) to compress air to 200+ BAR.

[loudmouth]

yea its usaly found on top of the older HLS siren look on the german site they have acouple videos of the siren. they just use alot of the same parts.