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kagome122885
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Wed Jan 16, 2008 6:44 am

I also wish that the Thunderbolt was brought back into production. The siren is built like a tank, but the guts of the thunderbolt are very complex. Even if it were made with DC motors and beltless drive systems, It would be so expensive that no one would want to spend that kind of money. The chances of the Thunderbolt coming back into production is very unlikely.
Federal Signal Thunderbolt Series, still the King of Air Raid Sirens!

Robert Gift
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Wed Jan 16, 2008 4:26 pm

The Thunderbolt has too many complications which can fail.
Also Thunderbolts require expensive maintenence and inspections - though some not maintained seem to run just fine!

The 2001 makes excellent use of technology and efficient design.
Notice thathe motor housing forms an efficient exponential flare pathway with the exterior "bell".

Why are any mechanical sirens still made?

I love "true" sirens which chop air.
But cannot efficient exponential horn speaker sirens produce more sound with less power?
Don't some also produce minor third dual-tones?

With all the problems obtaining three-phase power to power a 2t22A,
I have considered getting a DC motor(s) and a lot of storage batteries, especially since our power source is west of us and could be taken out by a tornado heading our way.

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SirenMadness
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Wed Jan 16, 2008 8:58 pm

Slant: a system of Whelens in Wichita, Kansas, plays a Thunderbolt recording, to minimize using a way-different tone.

Robert: speaker sirens can produce sound more efficiently in some cases than mechanical sirens, but the risk of blowing a speaker is more apparent than the risk of frying a motor.
~ Peter Radanovic

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jkvernon
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Wed Jan 16, 2008 9:04 pm

Slant: a system of Whelens in Wichita, Kansas, plays a Thunderbolt recording, to minimize using a way-different tone.
That's actually Wichita Falls, Texas.[/quote]

OrnAlert
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Thu Jan 17, 2008 1:01 am

This topic has been discussed so many times.


Like everyone else said, The thunderbolt is just too complex to be efficient.

All the cities that have t-bolts keep them because they can take the maintenance, and they have already paid for them.

And of course, it would be very costly to make them, forcing it to have a monster of a price, and no town would buy it at that rate.

Like I always say, the 2001 is your T-bolt now. Instead of bothering federal with t-bolt revival requests, tell them to improve the 2001 and make it lower pitched etc.

Robert Gift
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Thu Jan 17, 2008 1:09 am

OrnAlert wrote:... Instead of bothering federal with t-bolt revival requests, tell them to improve the 2001 and make it lower pitched etc.
Why don't they make it lower pitched?
Are they just spinning the same 12(?)-port rotor faster to suck in more air and chop it and raise dB?

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kagome122885
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Thu Jan 17, 2008 7:08 am

Robert Gift wrote:
OrnAlert wrote:... Instead of bothering federal with t-bolt revival requests, tell them to improve the 2001 and make it lower pitched etc.
Why don't they make it lower pitched?
Are they just spinning the same 12(?)-port rotor faster to suck in more air and chop it and raise dB?
What I think Federal should do with the 2001 is use either a 7 port rotor or the rotor from their Eclipse sirens.
Federal Signal Thunderbolt Series, still the King of Air Raid Sirens!

Robert Gift
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Thu Jan 17, 2008 1:57 pm

kagome wrote:... What I think Federal should do with the 2001 is use either a 7 port rotor or the rotor from their Eclipse sirens.
Is it now 12 or 14 ports?

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SirenMadness
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Thu Jan 17, 2008 8:58 pm

The 2001 series still utilizes a twelve-port rotor; a higher-speed motor creates the higher pitch in the 2001-130 in relation to the 2001 SRN-B.
~ Peter Radanovic


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