LDCs for PCPs

[Rallyshark]

Is there a place to acquire a Huma? I would look into doing it depending on co$t...

Yep, you can get them straight from the source.  MOD 30 if you want smaller diameter, and MOD 40 if you want maximum noise reduction.  The MOD 40 isn't super larger in diameter though. 
https://www.huma-air.com/Modular-Airgun-Silencers-or-Moderators

You can also source them from retailers in the states if you are in a bigger hurry to get one. 
https://www.trenieroutdoors.com/gear/airgun-moderators/airgun-moderators-3/huma-air-airgun-moderators/

[mrbulk]

Is there a place to acquire a Huma? I would look into doing it depending on co$t...

Yep, you can get them straight from the source.  MOD 30 if you want smaller diameter, and MOD 40 if you want maximum noise reduction.  The MOD 40 isn't super larger in diameter though. 
https://www.huma-air.com/Modular-Airgun-Silencers-or-Moderators

You can also source them from retailers in the states if you are in a bigger hurry to get one. 
https://www.trenieroutdoors.com/gear/airgun-moderators/airgun-moderators-3/huma-air-airgun-moderators/

Thanks Donny, at first I couldn't find any links except for some kind of health care site or something...

[mrbulk]

This comparison review that includes the Huma seems fairly balanced, I like how he admits he was unaware he'd be doing a video when he came in to work. In fact the way he was dressed it kinda looked like he planned to spend the day out hunting or something.

So it made some of his offhand remarks seem more truthful and believable (like admitting the Huggett was not quite as quiet as another moderator or that their airgun shop did favor the Weirauch unit, etc.):

[rkr]

This comparison review that includes the Huma seems fairly balanced, I like how he admits he was unaware he'd be doing a video when he came in to work. In fact the way he was dressed it kinda looked like he planned to spend the day out hunting or something.

So it made some of his offhand remarks seem more truthful and believable (like admitting the Huggett was not quite as quiet as another moderator or that their airgun shop did favor the Weirauch unit, etc.):

BAR gives rather honest reviews IMO and what they say in that video has been confirmed by independent sources. HW is a good unit and reasonably priced, less than 50 euros from Germany. My personal favorite and the quietest off the shelf unit I've measured is A&M Marksman or it's CF version Nelix. Having a CF silencer in a high power gun is IMO not a very good idea, they tend to come apart and in worst case you may have a carbon fiber schrapnel. It is also worth remembering that the video talks about 12 fpe guns, when you go up in power Huma with extension gets better due to increased volume. When it comes to silencers bigger is better 90% of the time.

[mrbulk]

rkr, yes and after watching the video it convinced me to order a Huma standard 40mm. Looking forward to receiving it!

[Rallyshark]

rkr, yes and after watching the video it convinced me to order a Huma standard 40mm. Looking forward to receiving it!

Welcome to the club!  You can also add another section to it later, if you need even more hush power

[mrbulk]

rkr, yes and after watching the video it convinced me to order a Huma standard 40mm. Looking forward to receiving it!

Welcome to the club!  You can also add another section to it later, if you need even more hush power

Yes I am now a new member of the CHC (Cool Huma Club). 

(and if I'm ever feeling inadequate, I'll just add some length, ha ha!)

Thanks for the link Donny!

[rkr]

rkr, yes and after watching the video it convinced me to order a Huma standard 40mm. Looking forward to receiving it!

Welcome to the club!  You can also add another section to it later, if you need even more hush power

Yes I am now a new member of the CHC (Cool Huma Club). 

(and if I'm ever feeling inadequate, I'll just add some length, ha ha!)

Thanks for the link Donny!

Cool HUMA club, I have 3 regulators and a bullpup made by Huub - that should qualify.

[Rallyshark]

Ha, I'd think so!

[Mr.P]

Watched that video about the huma moderator and I can't help but wonder: These items sell for like $40-$50 in Europe but close to $200 in the United States. You can get a metal cylinder with a threaded end cap and good dampening insert for $16 as a "fuel filter".

 Why is the price so high in the United States for what is basically a metal can with a few baffles? Convenience and no international shipping?  Are people here making these by hand, while they're being mass produced in Europe?  Like a "bespoke" ldc?  Is there a huge difference in sound dampening?  is it an issue of style / finish / fit?

So what's the added $150 -160 in value here?

[T3PRanch]

They are priced according to what people will pay (like most consumer goods). Not according to production cost .

[rkr]

It is easy to make a silencer that gives average performance. To make one that gives excellent performance requires quite a lot more. My opinion is that people are mostly paying for bling, not performance. That's because there are only few independent tests of different silencers with proper performance measurements.

[Mr.P]

I have probes and data loggers  to collect data on sound levels / audio spectrum.  I have been testing various homemade designs which I know we don't discuss here but it is interesting relating what I think I hear to what is actually happening with air pressure and sound.  I've been testing the effects of vent holes in the outer tube for example - number, position along tube and in relation to internal components/ sections, etc.  again, I will not get into details - my point is i am curious and testing using some dedicated hardware.  I have zero training specifically in sound sampling and analysis so this is strictly a simple backup and extension to my ears.

I've never tried a high end LDC but a friend has a DonnyFL model that I would like to test alongside cheap homemade options.  I'm not really interested in debunking the whole "niche luxury product" aspect. High end air guns are clearly luxury items, like the Teslas (alternative and limited energy source, high price?) of the gun world, and so of course people buy luxury ldcs for them. 

But back to what I have been doing, what I would like to understand is what the differences are, if any, so that I can make the best of my own investigations. If there are no differences that would also be nice to know so I don't waste my time pursuing something that's just nothing in the end.

3D printer on the way so I have a chance to really tinker.

[rkr]

There's the well known basic design that most manufacturers use and it gives good results. In addition vent holes can reduce or increase the noise level and the dB peak frequency can be tuned to give different types of sound - high pitch often sounds like less dB even if it's more. Other than that it's all about volume - based on my testing.

[Mr.P]

Thanks that makes sense.  The idea of tuning the tone is an interesting one.

[JungleShooter]

Airgun Silencer Testing
This guy at Silent Thunder Ordnance gets pretty involved when he attempts to do anything. I'm very impressed.
He has a scientific test setup, and has examined over a dozen differnt silencers side by side.


I'll post the links to his articles so you won't have to do the searching as I had to.... 

Part 1:          https://www.silentthunderordnance.com/blog/2018/10/4/project-fx-crown-moderator
Part 2:        https://www.silentthunderordnance.com/blog/2018/11/5/project-fx-crown-moderator-part-2
Part 3:        https://www.silentthunderordnance.com/blog/2019/1/16/project-fx-crown-moderator-part-3
Part 4:        https://www.silentthunderordnance.com/blog/2019/2/7/airgun-moderator-design-performance-and-development-part-4
Part 5:    ▲ ▲  Here all the silencers are compared, even those tested at a later date than Part 5 ▲ ▲
            https://www.silentthunderordnance.com/blog/2019/3/1/airgun-moderator-design-performance-and-development-the-big-test-part-5
Part 6:        https://www.silentthunderordnance.com/blog/2019/4/1/airgun-moderator-design-performance-and-development-the-edgun-leshiy-part-6
Part 7:        https://www.silentthunderordnance.com/blog/2019/4/25/airgun-moderator-design-performance-and-development-shroud-dampers-part-7
Part 8:        https://www.silentthunderordnance.com/blog/2019/4/26/airgun-moderator-design-performance-and-development-the-edgun-leshiy-part-8
Part 9:        https://www.silentthunderordnance.com/blog/2019/4/30/9y18x2ito7vnstlfb79dr6f7jryynj
Part 10:    Tiny change in the design, huge change in sound!
            https://www.silentthunderordnance.com/blog/2019/5/16/airgun-moderator-design-performance-and-development-the-edgun-leshiy-part-10
Part 11:        https://www.silentthunderordnance.com/blog/2019/6/11/airgun-moderator-design-performance-and-development-the-semifinal-mus-test-part-11
Part 12:        https://www.silentthunderordnance.com/blog/2019/6/13/ddfc402orcoh739wwchwtdcpa4alwy


Cheers,
Matthias

[JungleShooter]

Silencer Specs Table

Here is a Silencer Specs Table for my fellow shoppers.
Includes about 30 silencer models/ variations.

Sorted according to length.

Specs:
Connectors available for different gun brands
Calibers available
Weight
Thickness
Price



After making the table and comparing specs, I wrote to DonnyFL.
And the guy actually answered my email the next day.
Yes, he happened to have the same gun, a PP700.
And he had tried various of his models. And the best he found was a SUMO.

He recommended I get a .25 size for the .22 gun, to avoid clipping.


I'm a very happy customer.
My neighbors are very clueless people.
The pigeons are very dead pests birds wherever I go hunting.


Happy silencer shopping!    

Matthias


✱✱Attachment:  Silencer Specs Table✱✱

[mrbulk]

Matthias, thank you for the in-depth analysis articles and tables. They will come in handy indeed!

[AKM]

There's the well known basic design that most manufacturers use and it gives good results. In addition vent holes can reduce or increase the noise level and the dB peak frequency can be tuned to give different types of sound - high pitch often sounds like less dB even if it's more. Other than that it's all about volume - based on my testing.

That’s basically my findings as well although I have not tried vent holes, its always seemed counterproductive to me.
Volume is king and if it’s a baffle design use the smallest aperture holes you can get away with without affecting accuracy or creating too much back pressure.

[archellas]

I did this a while back ....