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scooterbugs25
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toroidal whistle, Video

Tue May 01, 2007 4:15 am

This Is a LOUD Whistle.. 70 db at 2.5 miles!! Check out the Echo!
looks like "Big Red" proto type

http://www.youtube.com/watch?v=jbhxzW21ejc
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JasonC
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Tue May 01, 2007 4:31 am

Wowwwww, I remember reading about this thing years ago when I first got into sirens. I think someone posted about it on the old board. Nobody really knew much about it but its nice to finally hear what it actually sounded like. Great find!
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thunderbeam63
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Tue May 01, 2007 8:53 pm

What In the world is that!?!?!?
PENIS!
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SirenMadness
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Tue May 01, 2007 9:07 pm

I think that the whistle is a compressed-air siren.
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StonedChipmunk
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Tue May 01, 2007 11:06 pm

Really does sound like it... a whistle shouldn't have that distinctive "wind-up" sound.
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Blasty
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Wed May 02, 2007 12:40 am

I believe that's just due to the way the pressure ramps up. Also, when it's doing the attack signal you can hear all sorts of little noises that would only come from a whistle, not a siren.

Really cool video by the way. What an impressive machine!
Beware those who teach not how to think, but what to think.
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StonedChipmunk
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Wed May 02, 2007 1:38 am

Nice av, Blasty!

Anywho, I guess you are right. The ramp-up in pressure would probably make that sound. Because the wind-up is too fast to be a siren.
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Daniel
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Wed May 02, 2007 2:19 am

That is the most impressive whistle I've ever heard! I want to build one. What kind of pressure does that require? Would it be more or less efficient on steam?
Lex orandi, lex credendi, lex vivendi.
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JasonC
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Wed May 02, 2007 4:30 am

Daniel wrote:That is the most impressive whistle I've ever heard! I want to build one. What kind of pressure does that require? Would it be more or less efficient on steam?
Your better off asking him! :P
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SoundOff
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Fri May 04, 2007 10:27 pm

According to his website, it needs 15psi but a lot of CFMs (1800). I think the grey thing attached to it is the blower. In the video, he mentions a diesel powered generator which I think is to run the blower motor.

In terms of siren sound level measurments; the one in the video produces 125db @ 100 feet on axis with the output. His later design, which incorporated a large horn, was able to do 135db @ 100 feet.

http://rjweisen.50megs.com/fluepipe1_012.htm (original design)

http://rjweisen.50megs.com/fluepipe1_014.htm (horn loaded design)
http://rjweisen.50megs.com/fluepipe1_015.htm
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