[TheForge] a lot of unimpressive BS
tim patterson
[email protected]
Tue Jan 6 18:33:00 2004
Hey Tom,
By all means please intrude into our ignorance whenever you see reason.
Tim
>From: "[email protected]"
>Reply-To: [email protected]
>To:
>Subject: [TheForge] a lot of unimpressive BS
>Date: Sat, 03 Jan 2004 21:29:17 -0500
>
>on 1/3/04 7:10 PM,
> > From: Chris Worsley
> > To: [email protected]
> > Subject: Re: [TheForge] hot air does not rise
> > Reply-To: [email protected]
> > The truth comes in simple words! Well said Dave, without a lot of
> > unimpressive BS ;-) . Thanks.
> > Chris
>
> >> Details, details, details. It still boils down to warm/hot air rises,
> >> cool air sinks. Exhaust from a gas forge is warm/hot and will move
> >> upwards, not towards the floor. The mechanism of the action is moot.
> >> It happens. The CO and CO2 and the H2O and other byproducts of the
> >> propane forge combustion will rise.
> >>
> >> Dave Brown
> >> Heritage Smithing
> >> Green Bay, WI
>
>
>Dear Chris and Dave,
>
>My attempt at an explanation of the physics of gases was not meant to be a
>criticism of Dave, or his shop, only a simple clarification of a very
>commonly misunderstood phenomenon. Several times a year I have the
>opportunity to demonstrate physics to elementary school students, and they
>understand the difference right away. They go home and explain it to their
>parents.
>
>The reason that I bothered to comment in the first place was not merely to
>pontificate "a lot of unimpressive BS" but in the hope that the information
>could be understood and utilized, apparently I was mistaken.
>
>I have visited many metalworking shops where a 6 foot diameter sheet metal
>hood was placed directly over a gas or coal forge, and vented straight up
>through a 10" dia pipe; and even though the forge directly below provided an
>endless supply of "hot air", the hood failed to draw. The owners simply
>couldn't understand why the shop was still smoky. The same goes for
>fireplaces in modern houses.
>
>The inverse of this is the "side-draft" flue, where smoke and flames from
>the forge turn 90 degrees sideways before they go up the stack. I sincerely
>hope that you never stumble upon one of these in action, it might confuse
>you.
>
>I almost always regret my postings to this list, and this is case is no
>exception. "Pearls before swine", and all that. I shall pester you no more,
>and please accept my sincere apologies for my rude intrusion into your
>contented ignorance, 'twon't happen again.
>
>Tom Troszak
>
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