Identified: Art Bell's "UFO" Aluminum Louvered Sheets - Heat Exchanger Fins

Vent vs radiator.jpg

"Arts Parts" refers to a collection of objects that were supposedly anonymously sent to Art Bell.
https://web.archive.org/web/20010614020521/http://www.artbell.com/roscrash.html
bild1-1.jpg

The "vent" material is very interesting:
bild4-11.jpg

That's a much more specific look. Very similar to air-conditioning vents, but on a dollhouse scale.

UPDATE Dec 12 2019 - The following is a summary of the identification from the thread below.

It's almost 100% certain this is a sheet of louvered fins for a heat exchanger (like a radiator or air conditioner).

Here's a VERY good match.

Source: http://www.daiwaracinglabo.com/about/

Note the exact same pattern of alternating direction blocks of 10 louvers, with long vertical grooves between the louvers where they are bent into an S-shape.

Here's another example showing the alternating directions of the louver pitches.
https://www.intechopen.com/books/he...e-study-of-heat-exchangers-with-louvered-fins



And another, showing the normal zigzag structure of the fins, with some fins partially flattened.

https://www.dewitts.com/blogs/news/what-is-serpentine-fin
Well done @deirdre, who first found this connection.
 
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That's a much more specific look. Very similar to air-conditiong vents, but on a dollhouse scale.

the vents are going in different directions. almost like you're supposed to cut them out individually and use them for something else.
 
It's possible it is a dollhouse accessory, a version of this, intended to be cut into individual registers
61ZpQUKmDOL._SL1500_.jpg
Seems unlikely, but not impossible.

I've looked through lots of "aluminum perforated sheet" type image results, not seen anything similar
Metabunk 2019-07-31 09-45-22.jpg
 
or maybe even the 'louvres' are meant to be individual parts? you know like those gold things you hammer into picture frames? Not those of course as those have nail teeth and bell's 'vents' look super shoddily made.

I think retro kitchens had wall vents. but seems like too many louvres for the size.
 
From Reddit:
Source: https://www.reddit.com/r/whatisthisthing/comments/ckaja9/sheet_of_tiny_vents_supposedly_ufo_related/evladsl/

Some kind of thermal radiant barrier is interesting. There's some similar things if you look for "radiant barrier" in attics or greenhouses.
Metabunk 2019-07-31 10-42-20.jpg
 
they are the perfect size for 1/4 scale dollhouse shutters. (or maybe even cupola windows) but everything im seeing is wood.
 
they could possibly also be for salesmen's displays of some gizmo. I don't know if salesmen still use those types of things, but they used to have mini versions of whatever they were selling to carry around to companies.. or as point of purchase displays so the customer can see it small.
 
It's entirely possible it's something very obscure, used in fairly rare machines, like lab equipment or something. But given all the similar kinds of things, there nothing really to indicate it's of alien origin.
 
And so, the thread changes subjects to a collection of metal artifacts sent to the late Art Bell and right away I recognized this "vent" as it is being called.
Most computers back in the day had vents like this on the rear side of the hardbox to help cool the internal systems. Also, I recognize these as used in manufacturing processes where the machine would punch out the strips and attach them to other parts.

As someone else pointed out previously in this thread, the "vent" is probably the dynode (a kind of electrode) of a 'venetian-blind' photomultiplier tube. In this kind of photomultiplier an array of oppositely oriented 45-degrees metal surfaces creates an electron cascade which amplifies the (very weak) signal generated by the incoming photon(s).

In this image the venetian-blind type is on the left. The rows of 45-degrees oriented dynodes are realized in practice with slotted metal sheets just as TTSA's.





Unfortunately I could not find a good picture of the slotted sheets. This is the best one, the 'venetian-blinds' are seen from the side:

 
As someone else pointed out previously in this thread, the "vent" is probably the dynode (a kind of electrode) of a 'venetian-blind' photomultiplier tube.

If you notice the solid strips between those vents appear awful soft and thin. They were probably manufactured with the intention of separating the columns before use. The depressions there look soft enough to cut with a boxknife, don't they? Also, imagine how flimsy it must be if picked up with either end column, they should be anticipated to instantly droop and bend under their own weight.

Screenshot_2019-12-07-23-45-58-1.png
I wonder what alloy this vent is made of.
 
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If you notice the solid strips between those vents appear awful soft and thin. They were probably manufactured with the intention of separating the columns before use. The depressions there look soft enough to cut with a boxknife, don't they? Also, imagine how flimsy it must be if picked up with either end column, they should be anticipated to instantly droop and bend under their own weight.

View attachment 38944
I wonder what alloy this vent is made of.

I m'everything but an expert in photomultipliers tubes :) A quick search turned out this:

upload_2019-12-10_17-43-33.png

The TTSA 'material' is probably a sheet of dynodes, which will be cut out (as you suggest) and then assembled in stacks into the tubes. They should be rather small, I cannot say for sure but a single dynode array could have a length on the order of tens of millimeters.

Another thought: if they are dynodes they are probably in an intermediate working stage, before the superficial oxidation referred to in the above document (or they would not be shiny). So I'd bet them to be made of AgMg, or CuBe, or NiAl :)
 
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Well, I'm not that confident anymore in the venetian-blind dynode hypothesis. This because I searched photomultiplier tubes and I did not find any which could have had rectangular dynodes. All the venetian-blind PMTs I found are round and with a head-on window, which means that the dynodes are probably circular. There may have been venetian-blind PMTs with rectangular dynodes but I have no evidence for it.

Pros for the 'vents' to be dynodes:
  • Venetian-blind PMTs dynodes have the same kind of slotted fins
  • From the pictures it looks the orientation of the fins switches 90 degrees from a single piece to the next one, just like it should be for dynodes meant to be stacked one upon the other
  • The size of the pieces and of the slots looks in the ballpark of dynode sizes
Cons:
  • No positively identified model of venetian-blind PMTs with rectangular dynodes
 
Well, I'm not that confident anymore in the venetian-blind dynode hypothesis. This because I searched photomultiplier tubes and I did not find any which could have had rectangular dynodes.

I feel like it's something relatively old and obscure - otherwise, it would have been found by now. Like some kind of valve manufacturing material (or something) briefly made in the 1940s that someone happened to have a sheet of, which they found in the attic.
 
Well, I'm not that confident anymore in the venetian-blind dynode hypothesis. This because I searched photomultiplier tubes and I did not find any which could have had rectangular dynodes. All the venetian-blind PMTs I found are round and with a head-on window, which means that the dynodes are probably circular. There may have been venetian-blind PMTs with rectangular dynodes but I have no evidence for it.

Pros for the 'vents' to be dynodes:
  • Venetian-blind PMTs dynodes have the same kind of slotted fins
  • From the pictures it looks the orientation of the fins switches 90 degrees from a single piece to the next one, just like it should be for dynodes meant to be stacked one upon the other
  • The size of the pieces and of the slots looks in the ballpark of dynode sizes
Cons:
  • No positively identified model of venetian-blind PMTs with rectangular dynodes
Don't give up.
https://www.hamamatsu.com/eu/en/pro.../pmt_tube-alone/metal-package-type/index.html
Metabunk 2019-12-12 07-13-32.jpg
 
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Thank you Clouds!! You were the one who originally proposed the dynode hypothesis, right?

And I had even seen those on the Hamamatsu catalogue.. but missing the 'venetian-blind' magic word I did not pay much attention, bad bad xD

By the way, there are also devices called 'electron multipliers' which have a similar structure (and a similar operation). Some examples:



sem.jpg

 
Very nice deirdre, expecially the last one is quite a good visual match.

So.. let me see if I remember well.. we have a sputtering target, a piece of layered industrial waste, and venetian-blind dynodes or louvered fins.. can we move the thread status to 'debunked' ?
 
Metabunk 2019-12-12 12-45-25.jpg
https://www.dewitts.com/blogs/news/what-is-serpentine-fin
For comparison:


Very promising.
 
After looking at some other examples I have to say it's almost 100% certain this is a sheet of louvered fins for a heat exchanger (like a radiator or air conditioner). Look at the long vertical grooves between the louvers where they are bent into an S-shape. It's identical to the DeWitts example.

Here's another example showing the alternating directions of the louver pitches, as seen in Art's Parts.
https://www.intechopen.com/books/he...e-study-of-heat-exchangers-with-louvered-fins
Metabunk 2019-12-12 12-58-09.jpg

Well done @deirdre!
 
:) just for disclosure: I couldn't figure out why there were no dollhouse floor registers (they make dollhouse accessories for literally everything!), so I finally thought maybe they'd be under "miniature heat exchanges" vs "registers"... and the louver fins were on the images page.
 
Note the exact same pattern of alternating direction blocks of 11 louvers, with long vertical grooves between the louvers where they are bent into an S-shape.
 
If I remember correctly, Art said that the parts were found out in the desert somewhere. So radiator parts or auto sunshades would be logical... but didn't Bell have the alloys analyzed at one time?
 
If I remember correctly, Art said that the parts were found out in the desert somewhere. So radiator parts or auto sunshades would be logical... but didn't Bell have the alloys analyzed at one time?
I just saw a recent interview with Linda Howe on the Black Vault. she read the letter the anonymous guy sent her about the materials (approx. 13:00 mins in) and the letter said "sent to Patterson AF base from New Mexico".

Then around 30 mins she is talking about testing. she names a few guys (like Whitely Strieber, who might have tested other bits) but she only tested on Art Bells behalf the little dot looking things. she doesn't say anything about having the other pieces tested. (the pieces in this thread anyway). of course it was an anonymous microbiologist who tested it and she knew him from him working with her on crop circles. He allegedly told her the same thing the grandfather allegedly told his young grandchildren back in the early 70s. so...

Anyway the story, the letter she reads gives, from start to finish is so full of holes (and hearsay) … it's weird.
Source: https://www.youtube.com/watch?v=XFTq0oSw_HQ
 
I just saw a recent interview with Linda Howe on the Black Vault. she read the letter the anonymous guy sent her about the materials (approx. 13:00 mins in) and the letter said "sent to Patterson AF base from New Mexico".

Then around 30 mins she is talking about testing. she names a few guys (like Whitely Strieber, who might have tested other bits) but she only tested on Art Bells behalf the little dot looking things. she doesn't say anything about having the other pieces tested. (the pieces in this thread anyway). of course it was an anonymous microbiologist who tested it and she knew him from him working with her on crop circles. He allegedly told her the same thing the grandfather allegedly told his young grandchildren back in the early 70s. so...

Anyway the story, the letter she reads gives, from start to finish is so full of holes (and hearsay) … it's weird.
Source: https://www.youtube.com/watch?v=XFTq0oSw_HQ

Thanks---I remember the Bismuth Alloy part now. I'm guessing that the square pieces were probably used to keep the louvers from vibrating out of place when the radiator is assembled.
 
I think it's well worth repeating that this bit of a car radiator has exactly the same provenance as the "metamaterial" getting attention via TTSA. They both came from the same anonymous source to Art Bell, who published some analysis of both of them 1996, on the same page, with similar levels of bemusement.

https://web.archive.org/web/20010815220312/http://www.artbell.com/rosreprt.html
Later they were taken over by Linda Moulton Howe.
 
One thing that interested me about the picture of the "collection" in the OP, is the 28 or so small cubes and a few small rounds pictured.

I bet they were included in the "collection" because they felt very heavy / dense, but were obviously not lead.
Must be Alien right?

Well if anyone has a kid who was / is in cub scouts and if your are serious about the pinewood derby,
then you will instantly recognize these as tungsten cubes and rounds commonly used in the
building of fast / thin ladder type pinewood cars.

I have a bunch of them still in the basement.
They come in varying sizes but typically 1/4 inch.
Search for "pinewood tungsten cubes" on ebay.

Pete
 
I bet they were included in the "collection" because they felt very heavy / dense, but were obviously not lead.

No, they are aluminum:
https://web.archive.org/web/20010815220312/http://www.artbell.com/rosreprt.html
One suggestion (on the Art Bell page) is that they are the result of punching square holes in an aluminum sheet.

Like this video, except square:
Source: https://youtu.be/JmAyep2V-Cw?t=471
See the tub of leftover pieces.
Metabunk 2019-12-13 15-38-23.jpg
 
Here's a video, making a radiator for cars.......showing the "opposite facing vents" being stamped-out. These are from copper sheet because copper conducts heat so well. Though not all are made from copper, because copper is expensive.


Here's the top (or bottom) of a vehicle radiator......

radiator_bent_temp.jpg

(source "One Dirt" off-road site. )
 
Reading the linked Art Bell post........ex~ "This letter was sent to Art and arrived on April 18, 1996. Along with this letter were pieces of various metals." ~ex.
....the story is even more farfetched than the "mysterious" metals.
In other words, if the 2nd-hand story is unbelievable, then the metal evidence can't be considered as "alien origin"....... just of "unknown origin". And we debunked it, visually.

The big disc certainly looks like a typical milled aluminum blank or billet.
 
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a super weird thing that popped up in my google. louvered fins

Approaching a quarter century and millions of eyeballs until someone’s tenacity finally pays off. Excellent effort.

Now we can conclusively, without doubt, state with utmost factuality the alien spaceships require heat dissipation. :p

Great work.
 
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