The Siren Board

Manitoba wrote:

coastalsyrolover wrote:Just to point out: there are 2 tri motor sirens (thunderbolt and hurricane. Thunderbolt being first.) and I think 2 or so sirens that had 2 motors with blowers. (An old German siren and the Chrysler. Chrysler had a separate rotator platform and the blower was part of the head so I do not count it as a tri motor siren.)

Would that German siren be the Hormann HLS 273?

Yes that's it!

SuperBanshee wrote: In 2007, the 2001's air intake was elongated by a few inches - this was done to make the siren produce 130 decibels at 100 feet. Prior to this, the 2001-SRNB was rated at 128 decibels.

For reference, moved the intake of the rotor itself up above the collector rings. Federal also removed a beam that went across the intake, both of which allow better airflow into the rotor.

2001s are electromechanical sirens with 12-port choppers that can produce about 128 decibels at 100 ft. They can rotate at 2, 4, and 6 rpm, and do not use a blower

BOB wrote:2001s are electromechanical sirens with 12-port choppers that can produce about 128 decibels at 100 ft. They can rotate at 2, 4, and 6 rpm, and do not use a blower

Somewhat... The older models, round back, and SRN models can rotate at 2RPM, 4RPM, and 8RPM. The Roundbacks and older SRN models (small motor cover) produce about 125-126 dbc. the SRN (fat motor cover) and SRN*B models produced 128 dbc. Lastly the latest model 130 produces 130 dbc hence the name. The SRN*B and 130 models rotate at a speed of 3RPM.

Thunderbolt10031 wrote:

BOB wrote:2001s are electromechanical sirens with 12-port choppers that can produce about 128 decibels at 100 ft. They can rotate at 2, 4, and 6 rpm, and do not use a blower

Somewhat... The older models, round back, and SRN models can rotate at 2RPM, 4RPM, and 8RPM. The Roundbacks and older SRN models (small motor cover) produce about 125-126 dbc. the SRN (fat motor cover) and SRN*B models produced 128 dbc. Lastly the latest model 130 produces 130 dbc hence the name. The SRN*B and 130 models rotate at a speed of 3RPM.

Thanks for the info! Notice the "about" before 128, meaning that it is an estimate. A 2001 must look pretty rediculous at 8 rpm lol