Huben pistol.

[TeslaToTheMoon]

Here’s a 4.25” X 1.024” design I threw together real quick, it only results in like a 2dB-4dB reduction, so I wasn’t sure if it was worth pursuing any further, I like a bit more sound reduction capability personally. It only weighs 34 grams so the 3” would probably be like 22-25 grams.

*Edit: Just tested it and it’s a 1.82dB reduction, however some of the infill/sound baffling material is breaking up inside, so if you are interested in this, I’ll need to explore ways to strengthen the inner structure, otherwise this might just be at the limit as far as how small these can be made before ASA is not durable enough for the job.

*Edit #2: It's actually a 4.17dB reduction. I was using an unmoderated number of the pistol when the Ares Adapter is installed without the cap, which actually results in a 1.8dB reduction on its own, I'm guessing because it directs the noise more forwards instead of out to the sides.

 

[Sergey1972]

Jim K.

Any chance you could share what the actual decibel readings were before and after the Sumo. Did the Sumo make it backyard friendly? Also, what pellets/speed/etc.

I'm planning to purchase, but need to make sure I could use it in my backyard and not disturb the neighbors.... to much . Thanks.

Bernie

Hugget snipe makes it backyard friendly. Tanto was louder.

 

[bernieorosz]

Hugget snipe makes it backyard friendly. Tanto was louder.

That's good to know.... I have a Sumo, which I would assume to be somewhat similar to that Huggett as both are over 6" long. These long moderators aren't pretty on the Huben, but for backyard, they maybe the only way to go for now as long as they don't clip.

 

[TeslaToTheMoon]

Jim K.

Any chance you could share what the actual decibel readings were before and after the Sumo. Did the Sumo make it backyard friendly? Also, what pellets/speed/etc.

I'm planning to purchase, but need to make sure I could use it in my backyard and not disturb the neighbors.... to much . Thanks.

Bernie

For me the Sumo takes it from 100.3 (with Ares adapter and cap on, 98.5 with cap off) to 91.83 for a 8.47dB reduction. I can verify I am also getting a POI shift to the low right with mine also @bernieorosz .

 

[bernieorosz]

For me the Sumo takes it from 100.3 (with Ares adapter and cap on, 98.5 with cap off) to 91.83 for a 8.47dB reduction. I can verify I am also getting a POI shift to the low right with mine also @bernieorosz .

That's a decent reduction with the Sumo..Thanks.

 

[weevil]

That's good to know.... I have a Sumo, which I would assume to be somewhat similar to that Huggett as both are over 6" long. These long moderators aren't pretty on the Huben, but for backyard, they maybe the only way to go for now as long as they don't clip.

Hi Bernie,

I’ve been using a sumo because I’m in a sensitive backyard context. The Sumo quietens it down a lot, but I’m still a bit uncomfortable with the noise! It’s quite a bit louder still than anything else I use in the backyard. I’m going to try a Tatsu as well, because I always like their dull thud. The sumo has a bit of a metallic ring to it. Overall, much better but let’s face it, this pistol is as loud as a firearm with no mod on it so it’s all relative. I shoot my k1 rifle afterwards and it’s a major reduction in volume.

 

[subscriber]

TeslaToTheMoon's advice is rather important; that you print only the threaded section, until you have confidence in thread.

I forgot to mention that the threads in my models are intended to be on the tight side, as the primary customer's print guy prefers to chase threads with a tap. That is a very good idea if you want maximum strength and minimum slop.

Some guys like the thread form "shaved" drastically for FDM printing, but my thoughts are that the Huben pistol is a high stress application, and needs all the strength it can have to keep the muffler from flying off.

The images below show the CAD model and dimensions of the thread form I used. It is perhaps 0.0025" tighter in diameter than if I wanted to be sure it would screw on easily after printing. That is half a percent tight on a nominal 0.5".

You can absolutely adjust the X and Y axis on your print slicer to 100.5%, to open up the thread diameter by 0.0025". If that is still too tight, try 101%. Do not adjust the Z axis, unless you know your vertical part lengths are off from nominal significantly; else you will be inducing a thread pitch error. Pitch errors present as parts screwing on easily for one or two revolutions, then going tight before you have the threads all the way in.

 

[TeslaToTheMoon]

For any wondering about terminal performance (unscientific), here’s a .25 Hades vs a Zucchini at somewhere between 40 and 60 ft-ibs. I haven’t chronied these yet.

 

[bernieorosz]

Hi Bernie,

I’ve been using a sumo because I’m in a sensitive backyard context. The Sumo quietens it down a lot, but I’m still a bit uncomfortable with the noise! It’s quite a bit louder still than anything else I use in the backyard. I’m going to try a Tatsu as well, because I always like their dull thud. The sumo has a bit of a metallic ring to it. Overall, much better but let’s face it, this pistol is as loud as a firearm with no mod on it so it’s all relative. I shoot my k1 rifle afterwards and it’s a major reduction in volume.

Thanks for the excellent feedback! I'm realizing that once I buy this pistol, no matter what, it will probably be louder than I wish. It's a powerful pistol, and like you said, similar to a firearm.

I was texting Kelly (KrazCool) over this past holiday weekend. My question to him was could it be backyard friendly when the power was reduced to say only 20-25 ft/lbs. I would only crank it up when hiking in the woods for security. He thought that would work. Kelly is a great guy!, but also salesman too .

Since all our backyards are different, 'backyard friendly' can be different too. That's why I'm interested in the decibel readings. Those are constant, and we can all relate to them. For me, 'backyard friendly' means no higher that 87-89 db's when taken close to gun. I also realize that different guns can 'sound' different at the same db reading.

I'm hoping that these higher db readings being posted are also at high ft/lbs. And, that reducing the Huben pistol's power, will result in corresponding lower decibel readings. But, maybe that's not the case.

 

[Back_Roads]

Just wandered over to follow along

 

[JungleShooter]

If I remember correctly, we once had a discussion on AGN or GTA that concluded:
➠ To test silencer noise reduction, the test must be run with actual pellets.

I don't remember the exact reasoning, but I'm sure the internal ballistic specialists on here will be able to serve that in a snap.

Matthias


PS: I'm really excited how helpful this thread is to GK1 owners, and how it is pushing the envelope.

 

[M0ist0ne]

So I'm actually going to be hard pressed to turn mine up. I plan on using this for short range pesting, so with .25 Hades at 750...dang, is all I can say. It came with the power adjuster almost all the way in and that was slinging the 26gr pellets at ~625. Half a turn out, up to 750fps.

Tested 6 mods tonight--didn't get to the tatsu, FX by donnys, and some 3d printed ones I have.

Keep in mind, I'm on a lower power tune--
But with my ears, ronin was definitely the quietest but way too heavy. Very surprised by the impulse ia-1350. 2nd best in my test--but with 5 baffles. Noticably louder with only 4. This was an ear test tie with the Shogun. But again, weight of the Shogun, impulse wins. Then sumo, koi, and Huma. To be fair, only had 3 baffles in the Huma and it's avalanche inserts, not fabric wrapped. Was a little disappointed with the koi, its normally one of the quieter ones, but it just sounds loud...was not a fan of how it sounded on the gk1.

And yes, I have a cheap db meter I will snag results with all this weekend but I wanted to pew and test some fart cans before it got too dark.

The lineup:

 

[Back_Roads]

I was also looking for a holster, I came up with a couple that are small but hold the pistol well and let it release when needed.
https://m.media-amazon.com/images/I/61gtH6GYkfL._AC_SL1200_.jpg

Amazon.com

I tried this one I already had modified and it works great and no metal clip if that could be an issue.

Amazon.com

 

[weevil]

Thanks for the excellent feedback! I'm realizing that once I buy this pistol, no matter what, it will probably be louder than I wish. It's a powerful pistol, and like you said, similar to a firearm.

I was texting Kelly (KrazCool) over this past holiday weekend. My question to him was could it be backyard friendly when the power was reduced to say only 20-25 ft/lbs. I would only crank it up when hiking in the woods for security. He thought that would work. Kelly is a great guy!, but also salesman too .

Since all our backyards are different, 'backyard friendly' can be different too. That's why I'm interested in the decibel readings. Those are constant, and we can all relate to them. For me, 'backyard friendly' means no higher that 87-89 db's when taken close to gun. I also realize that different guns can 'sound' different at the same db reading.

I'm hoping that these higher db readings being posted are also at high ft/lbs. And, that reducing the Huben pistol's power, will result in corresponding lower decibel readings. But, maybe that's not the case.

Bernie,

Two updates: First, I tried the Tatsu and it doesn’t seem any louder than the Sumo. Still has that metallic ting but there’s nothing clipping. Second, I asked my wife to shoot it and stood 15 feet away and of course, it was barely noticeable and the pellet hitting a tree was much louder! This is shooting JTS dead center 18.1 domes at 820, which is as low as I can go while keeping good accuracy. I think I’m pretty zoned in on these settings and pellets for the backyard, with the caveat that once the shine wears off, I’ll probably go back to using my Leshiy Classic 177 for that purpose.

 

[weevil]

If I remember correctly, we once had a discussion on AGN or GTA that concluded:
➠ To test silencer noise reduction, the test must be run with actual pellets.

I don't remember the exact reasoning, but I'm sure the internal ballistic specialists on here will be able to serve that in a snap.

Matthias


PS: I'm really excited how helpful this thread is to GK1 owners, and how it is pushing the envelope.

Unlike my K1 rifles, this pistol is much louder dry firing than shooting a pellet. So much so that it sounded like I’d taken the moderator off.

 

[subscriber]

Well, the pellet acts as a partial "moving plug", that helps force air to move radially, into the baffle spaces and against the walls. So, dry firing is not a representative test.

 

[weevil]

Also energy is imparted to the pellet from the air. But the difference between the rifle and pistol is interesting. The rifle releases much less air when dry fired and is also known to compensate for projectile weight without any changes to the power wheel. It appears that the valve stays open longer with heavier projectiles in the case of the rifle. Perhaps the short barrel of the pistol precludes this effect.

I’m also noticing that projectile speed rather than power is correlated with noise level. Heavy slugs shooting at 40fpe seem to be quieter than lightweight GTOs shooting faster but only yielding 20fpe. 30fpe 18.1 pellets are in between. I feel like I’ve just got to a point where I understand all the nuances of the rifle, but this pistol is another PhD.

 

[airgunmike56]

I want to shoot with open sights, So digen around in my JUNK box I had a six inch carbon fiber tube that I JB welded a nut and a washer , Not sure whats on the other end some kind of end cap JB welded , some fine wire and a hail curler stuck in the tube (I think) Got my GK1 turned down to 600 FPS and its super quite with the tube screwed into the ARES adapter,, I am very impressed and how quite it is , I dont think I would turn the power up this tube would fall apart...

 

[FLgunner]

I'm using this holster and it's working well. Very adjustable!

Amazon.com

 

[beerthief]

I like this gun ! i have absolutely no reason to buy one . I really try to invent at least one reason to buy and i just cannot do it .
I will probably just go with "i want one ."