The airgun is not a fire gun. And the “Hache” uses silicone baffles not a membrane . This moderator is for only used in airguns.
Upvote 0
Hache moderator by Mechainnova
- Thread starter Xolotl
- Start date
Here are some related concepts. Some just ideas; some implemented:
www.airgunnation.com
Porous Moderator Design Tests
I found that when I switched to TPU the effect of the porous walls was less obvious. What was obvious was the lack of torsional rigidity. Because I was threading the insert onto the barrel, the insert needs to be rigid enough to transmit the screw force. The porous walls made it too easy to...
www.airgunnation.com Upvote 0
Yes those are called "wipes" and are useful in specialized tasks. They are a niche item. When you want them, you REALLY want them.
Upvote 0
For airgun moderators, "non-contact wipes" are indicated; at least for smaller caliber pellet shooting. Hence air valve ideas demonstrated or explain in this thread and others. With Tesla Valves, the air itself is the valve, but is still leaky compared to what Xolotl has invented. Now, we need to prove the pudding.
Upvote 0
Why should a moderator affect the velocity of the pellet? Is a velocity drop from bare muzzle an indication of pellet to baffle contact? The data appears to reduce and increase the pellet velocity. I interpret that as noisy data, collected on different days.
I think the primary concern is about the baffles starting to close before the pellet has passed, and contacting the pellet. Such contact is likely to cause groups to open up, so shooting at targets to see if the group size or point of impact are affected would be very interesting.
I don't think we want to see even a hint of pellet to baffle contact.
I think the primary concern is about the baffles starting to close before the pellet has passed, and contacting the pellet. Such contact is likely to cause groups to open up, so shooting at targets to see if the group size or point of impact are affected would be very interesting.
I don't think we want to see even a hint of pellet to baffle contact.
Last edited:
Upvote 0
The hole diameter when the pellet pass through before to leave the moderator is 5/16. And this is the device used to measure the velocity
I mark the H baffles using Prussian blue, but it stay in the baffle walls.
Upvote 0
Thank you Xolotl.
I still think you need to shoot paper targets to prove the device does not affect the pellet path in some way. Even due to air flow.
Also, at some point you need to test at higher power; then establish a maximum power limit for this moderator; if there is one.
I understand that this product is still under development; and that may take some time. You are doing what a few of us have been dreaming about. I wish you success.
I still think you need to shoot paper targets to prove the device does not affect the pellet path in some way. Even due to air flow.
Also, at some point you need to test at higher power; then establish a maximum power limit for this moderator; if there is one.
I understand that this product is still under development; and that may take some time. You are doing what a few of us have been dreaming about. I wish you success.
Upvote 0
You was right, root cause were a misaligne. Now the the pellet velocity is the same with moderator and without moderator.
Last edited:
Upvote 0
The attached video shows the performance of the moderator.
The distance between the sonometer and the air gun is 3 feet.
The following pics shows the moderator dimensions in the 3 different stages.
The distance between the sonometer and the air gun is 3 feet.
The following pics shows the moderator dimensions in the 3 different stages.
Last edited:
Upvote 0
Not yet, but I am will working on it this weekend, also I am developing a gauge to check the alignment of the internal baffles hole and 1/2-20 thread. As soon as them will be ready, I share the results in the forum.
Upvote 0
The attached pics shows the accuracy of the gun with and without moderator. The target was a 10 meters.
Upvote 0
New H moderator configuration, this configuration is showing in the attached picture.
The video shows the performance of this one.
The video shows the performance of this one.
Upvote 0
My post in the "pistol" section -
Ouch...that's a mighty long muffler !!!
Seems that a pistol muffler should be about 1/2 of that, 6-3/8" length. Maybe 4" long.
I like the idea of the empty chamber then a baffle of some type. But again, the chamber doesn't really "need" to be that long...does it ?
How much air, by volume comes out the the .22 gun at, say, 550 fps ? Then the empty chamber should be some small portion of that volume, as expended, but it seems to me, "not" the full expanded volume. That could actually be "any" size if you think about it.
As I tested the original, two chamber muffler, in a few ways. I found that the two chambers, as...empty (no baffles), did a reasonable job of quieting the sound. VERY near what happened with the two baffles installed. Unfortunately, I did not try one empty chamber, and one baffle. I should have.
I'm going to take apart the muffler that I have. Remove the first baffle, leave the second baffler in place, see how that sounds.
So, one expansion "only" chamber, one baffled chamber, and test.
Mike
Ouch...that's a mighty long muffler !!!
Seems that a pistol muffler should be about 1/2 of that, 6-3/8" length. Maybe 4" long.
I like the idea of the empty chamber then a baffle of some type. But again, the chamber doesn't really "need" to be that long...does it ?
How much air, by volume comes out the the .22 gun at, say, 550 fps ? Then the empty chamber should be some small portion of that volume, as expended, but it seems to me, "not" the full expanded volume. That could actually be "any" size if you think about it.
As I tested the original, two chamber muffler, in a few ways. I found that the two chambers, as...empty (no baffles), did a reasonable job of quieting the sound. VERY near what happened with the two baffles installed. Unfortunately, I did not try one empty chamber, and one baffle. I should have.
I'm going to take apart the muffler that I have. Remove the first baffle, leave the second baffler in place, see how that sounds.
So, one expansion "only" chamber, one baffled chamber, and test.
Mike
Upvote 0
I've got one (short) with the latest baffles, haven't played with it much but my Donny Tanto is a touch quieter and smaller in diameter, but longer. I'm busy sorting out a messed up Maverick, regs decided to die, and my Raptor is getting closer.
Last edited:
Upvote 0