Choo Choo Choo Toot Toot Toot.
Just a little something about steam engines.
73, John de VK2XGJ
VK2XGJ Satellite Gateway
The early bird may get the worm
but the second mouse gets the cheese!
- Original Message -
From: "Peter Jobusch" <[EMAIL PROTECTED]>
To: "Multiple recipie
Thanks Walt,
I particularly like your statement:
>>In the meantime, we may generalize that the larger the diameter of ALL
the elements of our sight glass systems, the less apparent the capillarity
action will be.<<
I think I'll have you build me a sphere for my next sight glass!--or,--a
con
Lunkenheimer Esquire,
You "sound" so well informedYou wrote:
" Are there no sons or daughters of steamers that are taking introductory
Botany or graduate level Plant Phys? "
No! but I am sure getting there with all this conversation! E.G--Royce
wrote: If I may be so bold as to step int
Geoff,
In some species of plants, the cells may be quite long. In some cases they
are attached end to end with what appear to be sieves at each end (think
miniature bamboo inside a plant. The massmaple piece presented a few of the
many facets of liquid and gas movement in plants. This is a subj
I would venture a guess that the sap in the tree only has to be raised one
cell at a time ...
Pete
At 07:35 PM 2001-05-30 -0400, you wrote:
>OK but vacuum will not suck up water more than 33 feet.
>So what does the top of the tree do ?
>Peter.
>
>--
>> From: Chris Wolcott <[EMAIL PROTECT
Shades of Botany 1 and Plant Physiology 420! With about 5 years
inbetween.
Almost everything mentioned here has some role in the flow of liquids in
plants, but no one item totally accounts for the phenomenon. Capillarity is
certainly part of it, as is evapo-transpiration, diffusion pressur
If I may be so bold as to step into a fray with those much more
knowledgeable than I, the capillary action only has to act over the length
of one "cell". And then the load (of lifting) is passed on to the next
cell.
royce
Geoff Spenceley wrote:
> Loverley, Chris wrote:
>
> No. As I recall, s
All - Have a look here: http://www.massmaple.org/flow.html - John
- Original Message -
From: "Peter Trounce" <[EMAIL PROTECTED]>
To: "Multiple recipients of sslivesteam" <[EMAIL PROTECTED]>
Sent: Wednesday, May 30, 2001 6:35 PM
Subject: Re: Capillarity
> OK but vacuum will not suck up w
OK but vacuum will not suck up water more than 33 feet.
So what does the top of the tree do ?
Peter.
--
> From: Chris Wolcott <[EMAIL PROTECTED]>
> To: Multiple recipients of sslivesteam <[EMAIL PROTECTED]>
> Subject: Re: Capillarity
> Date: Wednesday, May 30, 2001 5:19 PM
>
> Vacuum. T
Loverley, Chris wrote:
No. As I recall, sap is primarily drawn up by the evaporation of water
through the leaves. There may be some added benefit due to capillary
action as well, but it is not the primary force..
Peter wrote:
Fair enough, but after the sap in the leaf evaporates to the air, w
This morning I had a chance to take a look at www.trainweb.org/gearedsteam/
to see what was new. This is the sight with all the photos and data about
the wide range of North American geared locos. There is now a page for Bell
locomotives, which were built using Stanley Steamer engine components. T
Garden Gnomes 8-)
(We have a frost warning for tonight - down to 34 f last night )
Peter Trounce wrote:
> Chris,
> Fair enough, but after the sap in the leaf evaporates to the air, what
> pushes or pulls more sap in ?
> Peter.
>
> --
> > From: Chris Wolcott <[EMAIL PROTECTED]>
> > To: M
Vacuum. The water evaporating out of the leaf creates a partial
pressure that draws up additional liquid to replace it. I don't
remember all the nitty-gritty details, but if you know one you can ask a
horticulturist.
Peter Trounce wrote:
> Chris,
> Fair enough, but after the sap in the lea
I think the process is osmosis caused by a solution gradient due to
evaporation from the leaves Its a long time since my bio classses.
If you place a piece of large bore tubing in a bowl of water the water
level inside and out the tube remains the same. As you reduce the size
of the bore y
Chris,
Fair enough, but after the sap in the leaf evaporates to the air, what
pushes or pulls more sap in ?
Peter.
--
> From: Chris Wolcott <[EMAIL PROTECTED]>
> To: Multiple recipients of sslivesteam <[EMAIL PROTECTED]>
> Subject: Re: Capillarity
> Date: Wednesday, May 30, 2001 3:49 PM
>
Well, capillarity is OK.
It's what happens when a liquid wets a surface. And wetting means that the
molecules of water and glass attract each other, so that the water climbs a
distance up the glass, only limited by how much weight of water the
"surface tension" force can lift. It varies from one
No. As I recall, sap is primarily drawn up by the evaporation of water
through the leaves. There may be some added benefit due to capillary
action as well, but it is not the primary force..
Peter Trounce wrote:
> Isn't this how sap in a tree works ?
> Peter.
>
>> From: [EMAIL PROTECTED]
>>
At 01:48 PM 5/30/01 -0500, you wrote:
>Harry,
>Do you know anyone with Finite Element Analysis experience and software?
OK I've admitted I don't know anything about this, now you're just
yanking my chain aren't you? :-) But to answer your question, no.
hw
Harry,
Do you know anyone with Finite Element Analysis experience and software? I'm
still not sure that FEA would even help in this situation.
There is a web page (I have it book marked somewhere) that shows an FEA model
of a partitioned room having saturated steam introduced at one point and
Partially, but not entirely. There are many trees that are much taller than
the capillary push/pull will overcome. I haven't been into this discussion
for over 40 years, so I'm no where up to date on the latest theory.does
turgor pressure ring any bells? Not to be confused with tumesc#$&@.
At 12:23 PM 5/30/01 -0400, you wrote:
>Something's not right here !!!
>Peter.
Sorry Peter, I'm well past my point of making educated guesses, at
least those which I'd put in print. I agree that it's logical that some
component of atmospheric pressure is involved, or so it would seem to me,
Trent,
If you make a glass of the OD seal type, it is useful to get metric O-rings
because they come in 1mm cross-section, which makes quite a small unit.
Peter
At 11:11 AM 5/30/01 -0500, you wrote:
>I think we're talking about very similar designs, if not the same thing.
>Trent
We're talking about exactly the same thing. The difference in the two
is that one puts radial compression (through the ring) on the glass, the
other puts axial (end) compres
Well, Harry, the bit where it loses me is that just below the liquid
surface there has to be a reduced pressure (below atmospheric) so that the
rest of the liquid can be sucked up.
(The capillary attraction is only present at the surface of the tube
between liquid and gas.)
So all very fine, but w
Hello Harry,
I see your point. Both use the same materials, only in a different way. I
honestly don't know why I don't like the compression type fittings. They get
used in almost everything, not just steamers, and usually give no problem if
installed properly.
The sight glass that I was talkin
At 11:15 AM 5/30/01 -0400, you wrote:
>Isn't this how sap in a tree works ?
>Peter.
Peter,
Supposedly. I went looking for good, meaty information of behavior of
capillary action, and possibly information with which to predict it (I
found neither), but what I did find is that now the univers
At 09:54 AM 5/30/01 -0500, you wrote:
>Thanks to everyone for your input and thoughts. I think Steve probably
nailed it. The entire water path has a direct effect.
We still don't know that for sure, but for lack of better information we
can't go far wrong by assuming it to be the worst case con
Isn't this how sap in a tree works ?
Peter.
--
> From: [EMAIL PROTECTED]
> To: Multiple recipients of sslivesteam <[EMAIL PROTECTED]>
> Subject: Capillarity
> Date: Tuesday, May 29, 2001 9:56 PM
>
> Hi,
> How many people remember the classic demonstration of capillarity used in
> almost
Hello Everyone,
Thanks to everyone for your input and thoughts. I think Steve probably nailed
it. The entire water path has a direct effect. I think I'll take the precaution
and "go big" while the boiler is off.
Also, thanks for pointing out that "redline" sight glass is still available.
I'd
Kevin,
Looks like a Vertical cylinder too, under the driver/fireman's hand. Might be fun!
Maybe in 7/8n2, or looks like someone could use an Ozark miniatures speeder for the
'chassis' hum... Well see next year at St Louis!
Terry Griner
Columbus Ohio USA
30 matches
Mail list logo
