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Post  roddie Mon Dec 19, 2022 5:19 pm

I have some of this material. My employer sources it for our WR (Weather Resistant) speaker enclosures. The grilles which protect the drivers mounted in these enclosures are backed with acoustic Polyurethane foam which is resistant to UV. The foam is then backed with this; what I call nano-mesh and is used to prevent the ingress of wind-driven precipitation on the enclosure's drivers.

[EDIT-ADD] The sheet is .004" thickness T304L stainless steel and is non magnetic.

nano-mesh (T304L) Fulcru21

It would be expected to have a service-life of at least 10 years exposure to the elements for its intended use. [EDIT-END]

I grabbed a scrap piece from the trash to make an evaluation as to whether I/we could utilize it somewhere in our modeling hobby.. or possibly other applications as a filtering-media.

Some photos..

nano-mesh (T304L) Fulcru18
nano-mesh (T304L) Fulcru19
nano-mesh (T304L) Fulcru20


It could possibly be used in place of glass-mat/screen when used with epoxy. [EDIT-ADD] Brazing applications would also be possible.  Huh...  Huh...


Last edited by roddie on Fri Dec 23, 2022 5:56 pm; edited 2 times in total (Reason for editing : more discovery)
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Post  HalfaDave Mon Dec 19, 2022 6:30 pm

Hi roddie,

Using it as a lightning rod covering,
To fly a Cox engine through a lightning strike ?
All puns are intended...
Take care,
Have fun,
Dave
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Post  rsv1cox Mon Dec 19, 2022 6:36 pm

I looked at it and thought - something to replace the deteriorating filtering mesh in my Rx-7s fuel tank.
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Post  Ken Cook Mon Dec 19, 2022 7:21 pm

I would bet that would strengthen up a fuselage quite nicely if doped on. I know Allen Brickhaus was using 3/4 oz. glass applied with Minwax water based poly. He would use the mesh as a reference. After two additional coats of the poly, he would use Rustoleum lacquer primer and spray the entire model. Next was to wet sand down to the mesh. Put it on, sand it off so to speak. I would think this material Roddie would go around compound curves quite effectively unlike carbon veil.
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Post  NEW222 Mon Dec 19, 2022 8:57 pm

I was thinking similar to Ken. Possibly used for wrapping a wing center section instead of glass cloth?
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Post  roddie Tue Dec 20, 2022 5:45 pm

rsv1cox wrote:I looked at it and thought - something to replace the deteriorating filtering mesh in my Rx-7s fuel tank.  

PM me with the approximate size you need, and I'll mail you some Robert.
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Post  roddie Tue Dec 20, 2022 5:55 pm

NEW222 wrote:I was thinking similar to Ken. Possibly used for wrapping a wing center section instead of glass cloth?

This material comes in a roll and is laser-cut in our shop, to fit numerous sizes of speaker grilles. I'll ask the laser operator to save what would normally be discarded.. and we'll see what sizes those remnants are.

I have yours, Ken's and Robert's addresses on file and can mail you some samples to try.
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Post  roddie Wed Dec 21, 2022 6:58 pm

So.. today I checked for a material spec. and found this to be T304L stainless steel. I edited my opening post to reflect that information. I believe that the "L" designation imparts a "Low Carbon" grade of 304 stainless steel.

I also discovered the existence of another "thicker" (.010") sheet which has a brighter (silver-tone) appearance. It's noticeably heavier at more than twice the wire-size/diameter.

What surprises me; is that such a fine mesh can be acoustically-transparent. Apparently the "pressure-wave" of high-output audio penetrates-through the fine screen.. and blows-off any accumulated moisture.. Cool Yea.. I'm going with that.
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Post  944_Jim Wed Dec 21, 2022 7:59 pm

If water droplets can't get through it, does this suggest it could shed spent castor?
How heavy is it compared to the same size sheet of tissue?

I'm wondering if it could be used to sheet a wing...the engine running may impart enough of a harmonic vibration to shake off exhaust.

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Post  roddie Thu Dec 22, 2022 9:12 pm

944_Jim wrote:If water droplets can't get through it, does this suggest it could shed spent castor?
How heavy is it compared to the same size sheet of tissue?

I'm wondering if it could be used to sheet a wing...the engine running may impart enough of a harmonic vibration to shake off exhaust.

Compared to any tissue paper or silk-screen.. this .004" stainless steel screen is heavier. Heavier than actual "silk"..?? I would think so.. but I'm not certain.

It would be interesting to sheet a handful of model-airfoils with this screen material adhered to the framework.. but not doped/sealed in-between.. for some wind-tunnel testing. Maybe such a "skin" could provide stealth characteristics.. along with enhanced maneuverability. Can air be grabbed.. like a tire grabs a road-surface? Sub-Sonic Vs. Super-Sonic Vs. Hyper-Sonic.

Some cool photos I found while searching for Valkyrie aircraft. 1st photo is of a modern drone designated XQ-58A.

nano-mesh (T304L) Xq-58a10

The North American XB-70 is a very interesting subject to read about. HERE

nano-mesh (T304L) North_10
nano-mesh (T304L) Valkyr10
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Post  aspeed Thu Dec 22, 2022 10:58 pm

Screen for an air filter, fuel filter replacement, or maybe an exhaust baffle if it doesn't plug up.
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Post  roddie Fri Dec 23, 2022 5:06 pm

aspeed wrote:Screen for an air filter, fuel filter replacement, or maybe an exhaust baffle if it doesn't plug up.

Yes Alan.. Filtering comes to mind 1st off.. but the screen is quite small.. and could be too small to "free-flow' either air or liquid, depending on the application. For "our" purposes; its use as a fuel-filter element should work... if placed downstream from a pressure-bladder feed.

I'll reiterate; the actual application for this mesh is to prevent wind-driven precipitation from getting into a permanently-installed outdoor enclosure and its electronics.. through the "front" (projection) port(s).

I haven't tried this.. but I'd bet that if I held a sheet under running-water.. that it would not readily pass though; but would mostly deflect away. In a vertically installed app (as it's intended).. any ingress of water merely drips as "droplets" down into a drain channel just behind the grille.

I need a magnifying-glass to see the actual resolution of the screen. A loupe is preferred for making comparisons with other sizes.

Below is a photo of the "tag" that came on the roll.

nano-mesh (T304L) Fulcru21
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Post  gkamysz Fri Dec 23, 2022 7:15 pm

I would use it for filtration. I use a 100 mesh for filtering and water flows right through. This is 200 mesh and I would expect no difference. I think Cox intake screens are about 100 mesh. Mesh is openings per inch. For something like wing centers, glass cloth will be much lighter and easier to work with.

This stuff is ~390 g/m^2 and opaque monokote is 70-80 g/m^2.

The mesh on a microwave window reflects 100% of the radiation inside.

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Post  getback Sat Dec 24, 2022 7:48 am

Popcorn Eyebrows Sounds like some expensive stuff , I would think glassing with it would work well and according to those figures fuel filter insert . Probably have a look to it after glassing but maybe not soak through to get epoxy all over your fingers . tongue
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