Forced air intake for a Q siren.

[Robert Gift]

Well, you might never know because it has not been hooked up yet. Some people would doubt that it ever will be.

Who?
Lassie?
She has been growling and howling on 240 V three-phase since 2006, annoying the whole area every first Saturday of the month at precisely 12:00:00.

Since this photo, I have attached all 22 projectors (cones)

She almost announced her first tornado warning!: Aurora, to our west, sounded their Whelen 2900s(?)
But examining the skies, I could find nothing, so Lassie did not speak.

[Corey Hudson]

She has been growling and howling on 240 V three-phase since 2006, annoying the whole area every first Saturday of the month at precisely 12:00:00.

Do you have a video?

[Robert Gift]

...Do you have a video?

Yes.
Recorded on a JVC Hard Drive camcorder which my Lt. downloaded into the fire department computer.
I'll ask if he can post it somewhere.
On one test, after turning off the switch, I took the camcorder right up to the siren and viewed up the bottom intake tube and then into a lower projector.
From peak RPM it takes 2 minutes, 38 seconds to slow to full stop.

[Corey Hudson]

From peak RPM it takes 2 minutes, 38 seconds to slow to full stop.

Those are some good bearings!

Are you powering it by an
AR timer, or by light-switch to relay?

[Robert Gift]

From peak RPM it takes 2 minutes, 38 seconds to slow to full stop.

Those are some good bearings!
Are you powering it by an
AR timer, or by light-switch to relay?

I wonder if our lower humidity and air density at 5,200 feet allows longer wind-down? Haven't done any calculations.

AR timers? We don't need no stinkin' AR timers.

Light switch to 120 V actuated motor starter.
(I wanted to mount the switch just inside the sewage plant laboratory door!!!)

The switch is 6 feet up on the wall in the far corner of the lab under a piece of tape to discourage accidental operation.
I use a large quartz clock with sweep second hand to time the tests.
To emulate Attack: ON 6 seconds, OFF 6 seconds.
ON only 1 second does a "Growl".

Confucius say: Crowded elevator smell different to midget.

[Corey Hudson]

The air density play a role in the windown and the sound output i believe.

[pyramid head]

What!? I thought you never ran power to it.

[Henry455]

Beautiful Q, Henry.
Was it ever used on a vehicle?

Thanks, also for the different rotors displayed.

The Q rotor is a work of art, too.

Interesting that they "growled" at higher vehicle speeds.
I never noticed ours do that.

Their published inrush and maintenence amps are too conveniently even numbers.
Would like to know the REAL values.

This one did come off one of our units in the early 70's. I had it re-chromed around 1980 and besides some periodic polishing, its held up well through the years.
Free wheeling of the rotors at speed was not uncommon in those days. Not sure if it was because of the ball and ramp clutch. Federal now uses a different type of clutch. In fact that is one reason that B & M manufactures its present day coasters with a brake that is normally on. In other words you apply power to the brake to retract it from the back of the rotor. Our leader did not believe in brakes on any of our coasters which included Fed. model 77's, C5A's, Q's and B & M CS8's, He claimed it was too hard on the coaster bearing, not sure if there was any truth to that.
If any body is interested, those rotors are from a Fed. Model 28, Sterling M30, Fed. Model 77 and of course the Q.
Here is a different pic of the rotors:

[CABLEVision]

If any body is interested, those rotors are from a Fed. Model 28, Sterling M30, Fed. Model 77 and of course the Q.
Here is a different pic of the rotors:

Neat a sterling M30! Do you have the rest of the siren?

[Henry455]

Yes, its one Hoss of a siren, large motor and heavy. Its called a "free rolling" M30 but is not a coaster, no clutch.