"Byker" wrote in
:

"DAN" wrote in message
...

wrote:

Is there any benefit to this design?
Yes: the venturi tube effect.
https://en.wikipedia.org/wiki/Venturi_effect

When I first saw it, it reminded me of the "Turbo-Tube" of the 1960s




Yep, thats what we made out of beer & Coke cans
never can keep bored GIs from doing something,
when they are off duty.

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