User avatar
Chem_Boffin_6589
Registered User
Registered User
Posts: 931
Joined: Mon Dec 15, 2014 5:52 pm
Real Name: Alfie Woolard
YouTube Username: Alfie Woolard
Discord: Alfie
Location: South East England, UK

Re: Scored A Sentry SS3/Defender

Thu Oct 11, 2018 6:21 pm

DJ2226 wrote:
Thu Oct 11, 2018 5:22 pm
Chem_Boffin_6589 wrote:
Thu Oct 11, 2018 5:15 pm
Hello it's directional too. Never knew!
If I'm not mistaken all of the sirens produced by Sterling and Sentry are directional. The 3V8 and its derivatives and the 40V have directional rotors as well.
I've known Sterling Ms to have non directional rotors. I might need to check again given the Y-10 was a directional siren.
Alfie Woolard
Federal Signal MC know-it-all.
Installed, initiated and maintains school campus warning system.
https://www.youtube.com/channel/UCtGVVz ... 8BQ47VmdHg

User avatar
Travis
Global Moderator
Global Moderator
Posts: 1789
Joined: Mon May 15, 2006 8:46 pm
Real Name: Travis
YouTube Username: DL1011
Location: D/FW, TX
Contact: Website

Re: Scored A Sentry SS3/Defender

Sat Oct 13, 2018 10:25 pm

The later Sterling M's had directional rotors. Like I said earlier, this is the exact same rotor/stator assembly many of their sirens use. I am 99% the 3V8 has a directional rotor as well.
-The Princess

User avatar
fire_freak_57
Registered User
Registered User
Posts: 317
Joined: Mon Dec 05, 2016 1:46 am
Real Name: Kurt
YouTube Username: sirenfreak57
Discord: firefreak57#0781
Location: Greene County, OH
Contact: Website YouTube

Re: Scored A Sentry SS3/Defender

Fri Oct 19, 2018 10:26 pm

There is an inactive Defender in Medina County, Ohio as well, in Lafayette Township near Chippewa Lake. There are plans to replace that system with newer FS sirens in the future so that Medina County Sheriff’s Dispatchers can activate it directly via FSK as with the rest of the system. It’s been inactive since at least 2014. The 15V2T in that system is still active.
sirenfreak57
Owner of a Allertor 125 Control Cabinet, EOWS Driver, and other odds and ends.
My YouTube Channel | Summit County Siren Map | Cuyahoga County Siren Map

User avatar
DJ2226
Registered User
Registered User
Posts: 1415
Joined: Sat Mar 30, 2013 3:50 am
Real Name: Dennis Seldon
YouTube Username: DJ2226
Location: Columbus, Georgia

Re: Scored A Sentry SS3/Defender

Tue Oct 23, 2018 5:04 pm

fire_freak_57 wrote:
Fri Oct 19, 2018 10:26 pm
There is an inactive Defender in Medina County, Ohio as well, in Lafayette Township near Chippewa Lake. There are plans to replace that system with newer FS sirens in the future so that Medina County Sheriff’s Dispatchers can activate it directly via FSK as with the rest of the system. It’s been inactive since at least 2014. The 15V2T in that system is still active.
They don't need to replaced the siren to get it to activate with the county's system. Granted the chargers are still good, they could equip it with a FC like they did with the other Sentrys and give it a fresh set of batteries. The FC is capable of controlling 72 VDC sirens. It's been seen before with a few Sentrys in a system somewhere in Missouri and Romeoville's old PN-20. I remember seeing one online driving a T-135ACDC at one point too. Hopefully if they do replace it the siren can be saved from the scrapper. Considering that they were willing to install FC's on the other Sentrys I don't see why they wouldn't give it a try if they knew that it was doable.
Proud owner of a Model 1.
DJ2226's YouTube Page

User avatar
Model L
Global Moderator
Global Moderator
Posts: 621
Joined: Wed Dec 28, 2016 4:19 am
YouTube Username: Egress
Discord: Egress.
Location: Beaverton, Oregon

Re: Scored A Sentry SS3/Defender

Wed Oct 24, 2018 6:06 am

what is the difference between a directional chopper and a non directional chopper?
Resident of Beaverton, Oregon
Proud owner of 2 Model L's and a 1984 WS-3000 serial # 717
19 years old
want to chat? send me a request on discord: Egress.#7444 or DM me

User avatar
Chem_Boffin_6589
Registered User
Registered User
Posts: 931
Joined: Mon Dec 15, 2014 5:52 pm
Real Name: Alfie Woolard
YouTube Username: Alfie Woolard
Discord: Alfie
Location: South East England, UK

Re: Scored A Sentry SS3/Defender

Wed Oct 24, 2018 4:42 pm

Directional choppers can only go in one direction to make the most sound. It's when the vanes for the ports are directly at one end, like on an ACA rotor. Federal Signal rotors are non-directional, as the vanes are in between two ports. Any German, British or any euro siren will have a directional rotor to mazimise sound output. ACA used knife edges on their stators to increase even more output.
Alfie Woolard
Federal Signal MC know-it-all.
Installed, initiated and maintains school campus warning system.
https://www.youtube.com/channel/UCtGVVz ... 8BQ47VmdHg

User avatar
FahmiRBLX
Registered User
Registered User
Posts: 216
Joined: Fri Oct 28, 2016 7:01 am
YouTube Username: FahmiRBLX
Location: Either Selangor, Malaysia or Kerbal Space Center
Contact: YouTube

Re: Scored A Sentry SS3/Defender

Thu Oct 25, 2018 2:40 pm

Chem_Boffin_6589 wrote:
Wed Oct 24, 2018 4:42 pm
Directional choppers can only go in one direction to make the most sound. It's when the vanes for the ports are directly at one end, like on an ACA rotor. Federal Signal rotors are non-directional, as the vanes are in between two ports. Any German, British or any euro siren will have a directional rotor to mazimise sound output. ACA used knife edges on their stators to increase even more output.
Which means the 'blades' (Vanes?) on a directional spans directly from the axle to the chopper holes, while non-directional has vanes forming like the one on centrifugal fans?
A Muslim Malaysian, a siren & aviation enthusiast, and gamer.

Mini Mobil Directo Project
Sirens in Malaysia Thread

User avatar
Chem_Boffin_6589
Registered User
Registered User
Posts: 931
Joined: Mon Dec 15, 2014 5:52 pm
Real Name: Alfie Woolard
YouTube Username: Alfie Woolard
Discord: Alfie
Location: South East England, UK

Re: Scored A Sentry SS3/Defender

Thu Oct 25, 2018 5:20 pm

FahmiRBLX wrote:
Thu Oct 25, 2018 2:40 pm
Chem_Boffin_6589 wrote:
Wed Oct 24, 2018 4:42 pm
Directional choppers can only go in one direction to make the most sound. It's when the vanes for the ports are directly at one end, like on an ACA rotor. Federal Signal rotors are non-directional, as the vanes are in between two ports. Any German, British or any euro siren will have a directional rotor to mazimise sound output. ACA used knife edges on their stators to increase even more output.
Which means the 'blades' (Vanes?) on a directional spans directly from the axle to the chopper holes, while non-directional has vanes forming like the one on centrifugal fans?
Simplest way for me to explain is to find a picture of a single tone ACA P-15 chopper and then compare it with a chopper from a Model 5.
Alfie Woolard
Federal Signal MC know-it-all.
Installed, initiated and maintains school campus warning system.
https://www.youtube.com/channel/UCtGVVz ... 8BQ47VmdHg

User avatar
Snowcube
Registered User
Registered User
Posts: 553
Joined: Wed Aug 17, 2016 3:46 pm
Real Name: Sam
YouTube Username: Snowcube
Discord: lumex
Location: Between 90° and 100°W

Re: Scored A Sentry SS3/Defender

Fri Oct 26, 2018 3:26 am

Here ya go.
Image
Image
I have an unhealthy obsession with mini sirens.
Thingiverse page

User avatar
Chem_Boffin_6589
Registered User
Registered User
Posts: 931
Joined: Mon Dec 15, 2014 5:52 pm
Real Name: Alfie Woolard
YouTube Username: Alfie Woolard
Discord: Alfie
Location: South East England, UK

Re: Scored A Sentry SS3/Defender

Fri Oct 26, 2018 11:27 am

Zarlog wrote:
Fri Oct 26, 2018 3:26 am
Here ya go.
Perfect. Thank you sir.
Alfie Woolard
Federal Signal MC know-it-all.
Installed, initiated and maintains school campus warning system.
https://www.youtube.com/channel/UCtGVVz ... 8BQ47VmdHg

Return to “Main Outdoor Warning Sirens Board”

Who is online

Users browsing this forum: Ahrefs [Bot], Google [Bot], Semrush [Bot], whelen-ws-2000R and 43 guests