1/2 - 20 Moderator long and short versions

[bduares]

I hope so.

Big can printing. The Archangel

[bduares]

It fits. I had some doubts about that. I will be going out to the doctor tomorrow so while I am out I will grab some more of that paint and will paint this one.
Here is the Archangel on my Sumatra, and the others I have ready to test .

L-R Original print of Kurt's file. Smaller of Subscriber's mods, his Tesla mod, and Mike's Archangel

[bduares]

I got my Elegoo Neptune 4 Pro today, update the firmware, leveled the bed and it instantly cut my print time in half compared to my other printers. I did a 2 hour print on my Anycubic this morning, so I tested the same print on the Neptune. 40 minutes without anything being set to "high" speed. I'm happy. Plus it is tall enough that I can now print that bigger moderator of Subscriber's. 

[subscriber]

Awsome!

With your Sumatra, I suspect that the Tesla Valve mods are going to be more effective than even that very long design I did.  It certainly is not rated for more than 40 FPE due to the thin walls, but might survive because the large chambers should reduce the bulk pressure in a useful manner.

I guess we will see...

[mmcaleer]

I designed a three stage Tesla Valve moderator for the Sumatra.  It is beefed up everywhere, with thicker side walls having material added on the outside, to preserve more internal volume.  The overall length is the same as the shorter mod already printed.

Zipped STL attached.   Images in next post due to file size limits.  Also the reason why the texture and front cap designation were deleted.

Thanks,  I am going to print this one next.

[subscriber]

Thanks,  I am going to print this one next.

Mike,

I am curious what PCP you plan to attach to it?  Let us know the result, please.

[bduares]

I have 6 mods printed & painted so far. I will be doing another 4+ of them before I start the Great Sumatra LDC Destruction Test. Tested mods will include designs by Kent, Mike, Subscriber, Bob, and maybe others. Among the tested will be Kent's original fluted file, reprinted and painted, and his latest "hasty" reworking, Subscriber's long and "shorter" mods as well as his Tesla mod, Mike's Standard and Wraith mods, and others I may add to the  list.

So far the only survivors from the original batch are Subscriber's shorter mod and my original painted print of Kent's fluted mod. I have been reprinting and painting so the next test may be a bit more interesting. I will put the competition test in another post here so things don't get too far off track. The mods that survive the Sumatra will then be compared to each other for loudness. I look forward to seeing which mods win.

[Robert 5mm]

I designed a three stage Tesla Valve moderator for the Sumatra.  It is beefed up everywhere, with thicker side walls having material added on the outside, to preserve more internal volume.  The overall length is the same as the shorter mod already printed.

Zipped STL attached.   Images in next post due to file size limits.  Also the reason why the texture and front cap designation were deleted.

Peter, This is the quietest suppressor I have tried.

I think this Tesla three stage is the most effective design.

Could you modify this design to M14x1 threads to fit on my Pinty P-Force Tactical .22 without using an adapter.

Thanks, Robert

[OldCrow]

I have 6 mods printed & painted so far. I will be doing another 4+ of them before I start the Great Sumatra LDC Destruction Test. Tested mods will include designs by Kent, Mike, Subscriber, Bob, and maybe others. Among the tested will be Kent's original fluted file, reprinted and painted, and his latest "hasty" reworking, Subscriber's long and "shorter" mods as well as his Tesla mod, Mike's Standard and Wraith mods, and others I may add to the  list.

So far the only survivors from the original batch are Subscriber's shorter mod and my original painted print of Kent's fluted mod. I have been reprinting and painting so the next test may be a bit more interesting. I will put the competition test in another post here so things don't get too far off track. The mods that survive the Sumatra will then be compared to each other for loudness. I look forward to seeing which mods win.

If you blow that Archangel up on the Sumatra, let me know and I'll send you another STL with stronger structure.  That was never designed for anything that heavy but I can fix that problem in about 10 minutes.

[bduares]

I did notice the Archangel feels surprisingly "light" compared to several of the others I have printed. We shall see. I have 2 mods with the paint drying and I have an hour and a half left on the mod that is printing, then I will print out your Standard .22 mod, and that might be all I need for the test. Should give me at least 9 mods.

I have to say I love the looks of the fluted Mod of Kent's but I wish it were twice as wide with the same threading. That mod perfectly matches my Sumatra's cylinders.

I am also fairly sure that paint is having a serious effect on the mods. While I was painting them a few minutes ago I noticed a strange color liquid film happening. It goes away, but the first thing I thought was that it was "melting" it's way into the plastic. That's one of the reasons I am reprinting a couple of the one's that previously failed that weren't painted.

Here's are some of the soldiers ready for their test

L-R Mike's Archangel, Subscriber's (Pete?) long, Subscriber's Tesla, Subscriber's short, Kent's fluted without end cap, Kent's remake of the Ruger mod.
Out of these the Tesla mod is by far the heaviest in weight.

[Blackmagic12]

 If it`s not already to late bduares.

I have refined my "quick and dirty" design if your interested.
Modified the first baffle to be uniform and included vent holes in the same baffle.
Increased the thickness of the thicker part over the expansion chamber and lengthened it.
 
Regards.
Kent.

[OldCrow]

I did notice the Archangel feels surprisingly "light" compared to several of the others I have printed. We shall see. I have 2 mods with the paint drying and I have an hour and a half left on the mod that is printing, then I will print out your Standard .22 mod, and that might be all I need for the test. Should give me at least 9 mods.

I have to say I love the looks of the fluted Mod of Kent's but I wish it were twice as wide with the same threading. That mod perfectly matches my Sumatra's cylinders.

I am also fairly sure that paint is having a serious effect on the mods. While I was painting them a few minutes ago I noticed a strange color liquid film happening. It goes away, but the first thing I thought was that it was "melting" it's way into the plastic. That's one of the reasons I am reprinting a couple of the one's that previously failed that weren't painted.

Here's are some of the soldiers ready for their test

L-R Mike's Archangel, Subscriber's (Pete?) long, Subscriber's Tesla, Subscriber's short, Kent's fluted without end cap, Kent's remake of the Ruger mod.
Out of these the Tesla mod is by far the heaviest in weight.

Don't even bother to print that "Standard" it WILL fail on the first shot.  Jus' sayin'  that's a lot of trouble to go to for one shot.  Save the filament for another "Tough" Archangel if you want something that won't fail on your Sumatra.

[OldCrow]

Yeah... wouldn't you know.  I'll be back in the code for half a day if I try to go any heavier than my .25 cal Archangel is drawn.

I managed to take a .22 Archangel wall thickness up to 5% thicker than I normally run .25s at.  So... here it is.  Wall thickness on this is 2.1mm.  With such a big volume it may hold together.  Don't count on it but it might.

You can adjust power on that monster.  You might want to take it up in increments and log which blew at what power levels.  That would give us information about relative strengths of PETG.  We can use that to calculate an optimal wall thickness (well we'd be able to take a pretty good guess).

..

[subscriber]

Peter, This is the quietest suppressor I have tried.

I think this Tesla three stage is the most effective design.

Could you modify this design to M14x1 threads to fit on my Pinty P-Force Tactical .22 without using an adapter.

Interesting Robert, what platform were you attaching the TTV mod to; and at what power?  I ask, because I expect the relative TV mod performance to drop on lower power airguns, and to go up on the more powerful ones - subject to testing.

I can do a variant with an M14 x 1 thread for you.  How long is the male stud on your Pinty, from the very front end to the mounting shoulder?  I have 15 mm in my mind.  Is that correct?

[OldCrow]

Peter, This is the quietest suppressor I have tried.

I think this Tesla three stage is the most effective design.

Could you modify this design to M14x1 threads to fit on my Pinty P-Force Tactical .22 without using an adapter.

Interesting Robert, what platform were you attaching the TTV mod to; and at what power?  I ask, because I expect the relative TV mod performance to drop on lower power airguns, and to go up on the more powerful ones - subject to testing.

I can do a variant with an M14 x 1 thread for you.  How long is the male stud on your Pinty, from the very front end to the mounting shoulder?  I have 15 mm in my mind.  Is that correct?

It seems counter-intuitive but if I double volume by increasing diameter while keeping all other parameters the same I get roughly -3db every time.  YYMV but that's what the numbers seem to indicate.  I couldn't begin to explain that.  Maybe @Wobblyhand could take a stab at it?  How is his modeling going?

[Robert 5mm]

Peter, This is the quietest suppressor I have tried.

I think this Tesla three stage is the most effective design.

Could you modify this design to M14x1 threads to fit on my Pinty P-Force Tactical .22 without using an adapter.

Interesting Robert, what platform were you attaching the TTV mod to; and at what power?  I ask, because I expect the relative TV mod performance to drop on lower power airguns, and to go up on the more powerful ones - subject to testing.

I can do a variant with an M14 x 1 thread for you.  How long is the male stud on your Pinty, from the very front end to the mounting shoulder?  I have 15 mm in my mind.  Is that correct?

Yes 15mm
I did not really compare -I just quickly shot one shot and thought wow that was really quiet on a Beeman 2027 pistol

[OldCrow]

It looks like there are three layers of plastic 0.60mm which will need to be removed from the attachment end of that moderator if you print that file.  The easiest way to do that would be to put it on a gun that is running twenty or thirty FPE and shoot a blast of HPA through it.  Should come right out.  Mind your direction, it won't be moving slow.  If you don't want to do that just clear it with an xacto-knife.

TBH it probably will print as a little birds nest you can pick out with forceps.

[subscriber]

Robert,

Please PM me your email address so I can send you the STL for the M14 x 1 thread version of the triple tesla valve mod you requested.  The file is too large to attach here.

[bduares]

just zip it

OK I got the tough Archangel and remade mod of Kent's sliced and added to the list to print.

[subscriber]

Zipped it is over 4 Mb