Page 1 of 1
RPMs For Motors On Alerting Communicator's Of America Sirens
Posted: Fri Jun 08, 2018 6:24 am
by Oakland 2001-SRNB
I already know that a siren made by Federal Signal Is 3,450 RPMs but I am kind of confused, what is the RPM for an ACA Siren?
Re: How Many RPMs is an Alerting Communicator's Of America's Siren's is?
Posted: Fri Jun 08, 2018 6:27 am
by Tyler
Pretty much the same thing. The sirens all use run of the mill motors, so the RPM of each is nearly identical, unless it uses a custom motor like a Federal Model 2 or Thunderbolt.
Re: How Many RPMs is an Alerting Communicator's Of America's Siren's is?
Posted: Sat Jun 09, 2018 8:04 am
by Synther
Tyler wrote: ↑Fri Jun 08, 2018 6:27 am
Pretty much the same thing. The sirens all use run of the mill motors, so the RPM of each is nearly identical, unless it uses a custom motor like a Federal Model 2 or Thunderbolt.
That's true, with the exception of newer sirens from Federal Signal and American Signal Corperation. They all run at 4000 RPM, give or take depending on battery voltage and wind.
Re: RPMs For Motors On Alerting Communicator's Of America Sirens
Posted: Sun Jun 10, 2018 8:42 am
by Captain Dynamite
In the instruction manual of the ACA Allertor siren the maximum speed of the 10HP motor is 3,500RPM. I not sure if this rpm range applies to other ACA sirens but from what I know it Applies to the Allertor.
Re: RPMs For Motors On Alerting Communicator's Of America Sirens
Posted: Sun Jun 10, 2018 5:49 pm
by Arteelx
Just remember, you can instantly calculate the speed of any siren simply by knowing its pitch and the number of ports. For example, there is a Sentry siren near me that I have recorded, and when I analyzed the sound with a spectrograph, I found its pitch to be 473.1 Hz. I believe it's a 3V8-H, 7V8, or 10V...which means that it has 8 ports. So 473.1 (Hz) divided by 8 (ports) times 60 (seconds in a minute) equals 3,548 rpm.