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You’re missing the point. The geometrical dimensions do NOT describe the way the item LOOKS. I’ve agreed that the mesh is close to scale dimensionally, but it would not appear so on the model. Diffraction from such a fine mesh blurs the visiual appearance, making it look far more opaque than it may actually be. Some things do NOT
As I stated: "The problem here is that a real item shrunk to 1/87 of it’s original size would NOT look “right” … the physics of light do not allow it."
On Oct 28, 2018, at 12:03 AM, Ralph W. Brown <rbrown51@...
PRRT&HS No. 3966
From: Daniel A.
Sent: Saturday, October 27, 2018 6:03 PM
Subject: Re: [RealSTMFC] Poultry Cars
I’ve looked at it. I also attended Kristen’s presentation. To me the suggested
wire mesh seems about 30% transparent, vs. perhaps 90-plus% for the real poultry
cars.I’ve also worked with similar real mesh. It sure does NOT look like the
mesh as seen on the real poultry cars. This is undoubtedly due to lighting
effects, as the mesh’s dimensions seem close to correct. I suspect a good part
of this is due to both lighting angle and diffraction.
The problem here is that a real item shrunk to 1/87 of it’s original size
would NOT look “right” … the physics of light do not allow it.
On Oct 27, 2018, at 10:56 AM, Nelson Moyer
have you visited the TWP, Inc. web page and looked at the sample photos of
fine stainless steel mesh? The phots show a model’s hand holding a 3x3 swatch
of each available mesh so that prospective buyers can see the transparency.
The photos are front lighted, and the mesh specifications, including wire
diameter and opening size, are given for each mesh. I believe you will find
these photos instructive.
From: main@RealSTMFC.groups.io [mailto:main@RealSTMFC.groups.io] On Behalf Of Daniel A.
Sent: Saturday, October 27, 2018 8:50
Subject: Re: [RealSTMFC] Poultry
only needs about 10% hole-to-matrix size to see through something when
poultry cars, however are very transparent when FRONT lighted. This
requires more like 90% hole-to-matrix proportion. I’ve never seen really small
mesh of any kind that comes even close to this
to my knowledge, all the really fine mesh available is far to opaque to
represent the mesh on the poultry cars.