DonnyFL RONIN moderator issue

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MP_usa

MP_usa

Member
Apr 13, 2020
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New York, United States
Hello
I am using DonnyFL RONIN moderator (as suggested) for AEA Challenger .30 32" barrel. The felt inside the moderator is getting pressed to one side after every shot. So basically Supression is working only for one shot.
What am I doing wrong?

A_RONIN.jpg
 
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Not sure how much power.. AEA Challenger .30 32" by itself is more powerful due to the longer barrel..
Have you ever put your moderator apart?
Also - I was shooting without the Amo.. may be that's what causing it (which would be crazy..)
I have brand less moderator (similar to DonnyFL) for my .25 cricket - which is set to shoot 48 grain slugs at 900 fps - first its 2 times more quite and second never had any issue with it like I have with RONIN..
I was wondering if I was doing something wrong and how do I fix this situation..
 
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Petrenko_usa said:
Hello
I am using DonnyFL RONIN moderator (as suggested) for AEA Challenger .30 32" barrel. The felt inside the moderator is getting pressed to one side after every shot. So basically Supression is working only for one shot.
What am I doing wrong?

View attachment 303482
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Hi Petrenko_usa. The stuff you are calling "felt" does not look anything like felt to me. I have a donnyfl ronin on my fx maverick 30 cal sniper putting out about 110fpe and I have had my ronin apart. I didn't take it apart for any other reason than to see if it was dirty. So my ronin has the fine mesh screen like on yours, but then it has a sheet of dense felt wrapped around the screen. I did not put the tape back on when I reassembled it just to see if it made any difference. Without the tape I could not notice any difference -- it works really well for my 30 cal.
If that ronin of yours is brand new from donnyfl, then I think you should email donny with this picture attached and ask for the real felt that is supposed to be in the moderator. If your ronin is not new from donnyfl, then I think you should order replacement felt from donny and use real felt.
Honestly, the stuff in your moderator looks like knitting yarn.

grungy
 
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Hi again Petrenko_usa. I just checked donny's site and it is down. However, I did see that my local walmart has 9"x12" felt sheets in stock in the store. They are really cheap -- less than a dollar per sheet I think. I don't know if it is as good as the stuff donny sells, but I wouldn't be surprised if it's the exact same stuff -- it's just polyester fiber that has been crushed into a sheet. You'd be saving a lot of money and time. You can check other places you might have locally like Michael's (craft store) or Joanne's Fabrics.

Cut the 9x12 inch sheet down from 9" to the length of the core. Wrap the screen around the core first, then wrap felt around the screen until you have enough on there to fill the space between the core and the inside of the cylinder shell about 85% of the way. Cut off the excess. It will try to unwind while you are wrapping the stuff around the core and once you have the outer shell on, the screen and felt will unwind all the way and stay in contact with the inside of the outer shell -- unless you use tape. I chose not to use tape and it seems to be just as quiet as it was with the tape.

grungy
 
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Ingwe said:
Hello Fellas, I am new to this but is that all that is inside of an airgun suppressor....mesh and a piece of felt or foam??

I am ordering an FX Impact with Donny of some type, so I am now wondering how effective these things are.

I have experience with firearm suppressors and these things look totally different
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Airgun moderators don't have to deal with the heat and high pressures of powder burners. Some airgun moderators use separate chambers stacked together and others, like the donnyfl models, use a single core that is shown in this video. There is more to them than just a mesh and a piece of foam. The slugs/pellets pass very close to the walls of the holes which must be precise. Airgun moderators may not look like powder burner moderators, but the physics is the same.


grungy
 
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grungy said:
Airgun moderators don't have to deal with the heat and high pressures of powder burners. Some airgun moderators use separate chambers stacked together and others, like the donnyfl models, use a single core that is shown in this video. There is more to them than just a mesh and a piece of foam. The slugs/pellets pass very close to the walls of the holes which must be precise. Airgun moderators may not look like powder burner moderators, but the physics is the same.


grungy
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Thank you so much for that!!

There is a world on knowledge here on this forum
 
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That shelf liner that you have the Ronin resting on in the photo works as a better replacement to DonnyFL felt. Cut an exact size piece to fully cover the mesh and make it long enough to do 2 -3 wraps. The tape is just to hold it in place for reassembly. Twist the core in the tube continuously as you put it back together, you don't want the material to bunch up. It only ends up being a decibel or two better, but better is better, ...and you already have it!
 
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PumaCarl said:
That shelf liner that you have the Ronin resting on in the photo works as a better replacement to DonnyFL felt. Cut an exact size piece to fully cover the mesh and make it long enough to do 2 -3 wraps. The tape is just to hold it in place for reassembly. Twist the core in the tube continuously as you put it back together, you don't want the material to bunch up. It only ends up being a decibel or two better, but better is better, ...and you already have it!
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Hi PumaCarl. I'm sure my wife has the same shelf liner around here. If it works better, then I want to do that -- better is better like you said. So when you say 2-3 wraps, is that leaving some "empty" space, or would you suggest filling the entire space (non-compressed of course)? And I'm interpreting what you said about the tape to mean to not leave the tape in -- is that right?

grungy
 
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Use the tape to hold it. You will need it. You should put enough material around the core that it goes in tightly and you will have to spin it so that it doesn't catch and scrunch up (like the one in the photo did). Hold the core with your thumb and index finger wrapped right around where it enters the tube, to help compress the material and twist and push in an 1/8" at a time. It shouldn't happen easily or all at once, that's too loose.You are going to have to experiment with the right number of wraps a few times probably. You will understand what I'm saying after you have done it a few times. Good luck!
p.s. To answer your question about compressed or uncompressed, compressed but doable. If you get a chance, watch Earnest Rowe's video on what he does. He used one inch open cell foam in one of them and that looked like a major pain. We are dealing with a big puff of very high pressure air here, loose or easy won't cut it.
 
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PumaCarl said:
Use the tape to hold it. You will need it. You should put enough material around the core that it goes in tightly and you will have to spin it so that it doesn't catch and scrunch up (like the one in the photo did). Hold the core with your thumb and index finger wrapped right around where it enters the tube, to help compress the material and twist and push in an 1/8" at a time. It shouldn't happen easily or all at once, that's too loose.You are going to have to experiment with the right number of wraps a few times probably. You will understand what I'm saying after you have done it a few times. Good luck!
p.s. To answer your question about compressed or uncompressed, compressed but doable. If you get a chance, watch Earnest Rowe's video on what he does. He used one inch open cell foam in one of them and that looked like a major pain. We are dealing with a big puff of very high pressure air here, loose or easy won't cut it.
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Thanks PumaCarl. Now I know what you mean. That shelf material is kind of grabby. It tries to grab onto itself while wrapping and tries to grab the shell while assembling the parts. I'll get it right with a couple of attempts. I'll check out Ernest's video too.

grungy
 
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Ingwe said:
Why would you need to find a "replacement" for the felt as it comes as new?

Wouldn't Donny have researched this matter already and make his product with the most efficient material himself?

I would think that he reads here and would address the matter since it is posted by so many of his customers....
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Hi Ingwe. There are so many things that can be tried as a baffle material in donny's moderators that he had to choose something that worked reasonably well and make that the stock baffle material. He has said himself that many people try stuff other than felt that works better for them. I suppose you could think of it as trying to get your moderator tuned to your particular rifle by trial-and-error. The baffle material used and how densly it is packed into the moderator affects not only the sound, but in theory, could affect the projectile's accuracy and/or muzzle velocity depending on projectile weight and speed and air pressure behind it and length of barrel (volume of air behind the projectile) and so on. I'm speaking theoretically here -- not from experience. I'm just a guy who slapped a donnyfl ronin on his fx maverick 30 cal sniper and was happy with it just as it was out of the box.

grungy
 
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grungy said:
Hi Ingwe. There are so many things that can be tried as a baffle material in donny's moderators that he had to choose something that worked reasonably well and make that the stock baffle material. He has said himself that many people try stuff other than felt that works better for them. I suppose you could think of it as trying to get your moderator tuned to your particular rifle by trial-and-error. The baffle material used and how densly it is packed into the moderator affects not only the sound, but in theory, could affect the projectile's accuracy and/or muzzle velocity depending on projectile weight and speed and air pressure behind it and length of barrel (volume of air behind the projectile) and so on. I'm speaking theoretically here -- not from experience. I'm just a guy who slapped a donnyfl ronin on his fx maverick 30 cal sniper and was happy with it just as it was out of the box.

grungy
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That does make a lot of sense!

PS Which Donny Mod would you suggest for a FX Impact Compact in 25cal for maximum noise suppression? I'm not worried about size or looks
 
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PumaCarl said:
That shelf liner that you have the Ronin resting on in the photo works as a better replacement to DonnyFL felt. Cut an exact size piece to fully cover the mesh and make it long enough to do 2 -3 wraps. The tape is just to hold it in place for reassembly. Twist the core in the tube continuously as you put it back together, you don't want the material to bunch up. It only ends up being a decibel or two better, but better is better, ...and you already have it!
Click to expand...
That's funny you mention this because I just wrapped the outside of my DonnyFL with that to see if it made an improvement. As soon as I shot it I thought I should've put it inside. Guess it's time to crack it open again and see for myself.
 
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grungy said:
Hi AmosBurton. Did wrapping the outside of the donny make any noticable improvement?

grungy
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Maybe? It seemed to lesson the ping from the hammer. Or it's all in my head.
What it did do was provide a non-slip surface to help when my rifle is leaned up against the wall in my shop by the shooting window or a tree in the woods.
 
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