robert gift wrote:Would it not be.tter to amplify the stator output, as the FS 2001 does?
StonedChipmunk wrote:Think of a FS Model A (this might have been the siren you were actually talking about)
Yes! Thank you, Chip.
Same design, but case and reflectors seemed not as heavy and in white.
24 volts which I rewired to operate on 12. (Can't remember what I did.)
Wish I could ask the volunteer firefighter who put it on his "light bar"
in 1976. On the top of his vehicle it would receive ram air.
StonedChipmunk wrote:Actually, they would, unless they had a brake on them. Most sirens shaped that way do (newer ones, at least) that were made to be mounted on vehicles. Because think... if you have a firetruck going on a non-emergency call (no lights/siren... just imagine here) then if it was going around 45 MPH then you would be looking at around 45 MPH of wind coming into the cone of that siren... plus you have the wind pressurized by the cone itself and the force placed upon it, causing more air to enter. This would surely get a siren going by itself, which is why to prevent confusion many vehicular siren manufacturers have a brake on their sirens to prevent them from spinning while the vehicle is just moving.
Huh. I never knew they had a brake that was passively engaged while not in use. Thought it was only a stopping brake activated by solenoid.
Would that not cause a faster run down, or does it somehow engage only after stopped?
But withe stator reflector also gathering air, do they equalize enough NOT to spin the rotor sufficiently?
Thank you,