[AT] Culverts

[charlie hill]

Oh I don't have to try it Larry.  I have a dust collector that I use 
occasionally to put negative air on a large confined space.  It has a 36" 
diameter centrifugal blower driven by a 5 HP electric motor.
It is salvaged from an industrial application and the inlet pipe to the "bag 
house" started out life being 12" dia.   I modified it down to 6".   When we 
need it I locate it as close as possible to the job site and use 6" 
corrugated plastic drain pipe to duct the air from the containment to the 
bag house.   The first time I ever ran the thing I'm surprised the police 
didn't come.   Every dog in Carteret County had to be howling and running 
for cover.   I finally figured out that I could restrict the inlet of the 
drain pipe down to about half it's diameter and it would hush down to 
acceptable levels.  Restricting the end of the pipe is not hard.  All you 
have to do is put something against it.  You can hold the pipe horizontal, 
place a 4' long piece of 2 x 4 over the end and the air flow will hold it 
there until you shut the power off.

-----Original Message----- 
From: Larry Goss
Sent: Sunday, March 25, 2012 2:27 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Culverts

LOL! A steady and very strong southerly wind is one of the unadvertised 
features of Oklahoma, Charlie.  I used to give a demonstration to middle 
school students called,"Strings, Bells, Horns, and Whistles,"  where I 
demonstrated those four forms of "making music" for the kids.  In assembling 
some standard hardware items so I could get musical tones out of them, I 
discovered that you don't have to blow across the end of a pipe to make the 
air vibrate.  The fact that the wind can blow through a corregated pipe is 
all it takes.  The corregations cause enough pressure and rarifaction of the 
air as it passes through to make the culvert whistle.  Try it yourself.  The 
next time you see an unpackaged supply pipe with the spiral exterior so you 
can bend it around under a sink or toilet tank, blow through it.  It WILL 
whistle.

Larry

----- Original Message -----
From: "charlie hill" <charliehill at embarqmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Sunday, March 25, 2012 12:56:23 PM
Subject: Re: [AT] Culverts

Culvert or a drain tile here.  I guess the wind doesn't blow across the
prairie fast enough here to call them a whistle?

Charlie

-----Original Message----- 
From: Ralph Goff
Sent: Sunday, March 25, 2012 1:35 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Culverts

On 3/25/2012 7:41 AM, Larry Goss wrote:
> OK, Cecil, this thread brings back old memories from my time spent living
> in Oklahoma.  I now have a question for the group.  In Oklahoma, driveway
> culverts are known as "whistles".  I grew up in Indiana, and never heard
> them called that until I lived out along I-35.  What are they called in
> other regions of the country?
>
> Larry
Here in Sask. a culvert has never been known as anything other than a
culvert as far as I know.

Ralph in Sask.
>

_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at

_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at
_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at