Post by: bowsage1999 on January 14, 2022, 10:19:35 PM
Post by: Orion on January 14, 2022, 11:23:59 PM
Post by: Pat B on January 15, 2022, 09:57:02 AM
Post by: McDave on January 15, 2022, 10:08:44 AM
(Edit: sorry, I got this backwards the first time around)
Post by: durp on January 15, 2022, 09:30:40 PM
Post by: blacktailbob on January 17, 2022, 11:11:28 AM
Your results may vary.
Post by: Wudstix on January 17, 2022, 06:47:14 PM
:biglaugh:
:campfire: :coffee: :archer2:
Post by: Medley on January 18, 2022, 01:23:44 PM
Changing a tab even affects tune. Can be frustrating, can be fun- I know people on both ends of the spectrum.
But yes, silencers…. The type, shape, weight, and placement all affect tune in some way. But never so drastically that it can’t be fixed with a little change one way or other to the brace height. You say good enough way before you get to this point, and most do and they are right. Just answering the question….. I love archery for it’s simplicity…LOL
Post by: Terry Green on January 18, 2022, 01:26:56 PM
Post by: kopfjaeger on January 18, 2022, 01:33:10 PM
Post by: Medley on January 18, 2022, 01:41:22 PM
Just saying there is a change. May or may not notice, but it’s there….
I really discovered this tunings BW bow. 2 spiders on the string, changing placement, 4 spiders on the string, changing placement of those, then wool puffs…
If you try all of this with feathered shafts, you wont notice a thing. Bareshafts will show everything.
Post by: BAK on January 18, 2022, 01:51:02 PM
So what are the physics? Has to be about harmonics right?
So bottom line is it must be about adding a bit of weight to the string at precisely the right location to dampen the strings vibration, not so much as what the weight consists of. :o
Post by: Terry Green on January 18, 2022, 01:52:30 PM
I never had my silencers affect my bows tune. I use wool and acrylic yarn. I make my own.
Me either, and me too.... BowHush.
Post by: Wudstix on January 18, 2022, 03:40:51 PM
:campfire: :coffee: :archer2:
Post by: Medley on January 18, 2022, 06:09:11 PM
Post by: M60gunner on January 18, 2022, 06:20:30 PM
Post by: Medley on January 18, 2022, 06:25:37 PM
When I get a new bow, I first get a string, whatever it will be. Set it up with silencers, then tune the brace height. Once all of this is good, I get a second identical string for a backup.
Then I bareshaft tune the arrows, and that’s just the way that I have always done it.
Post by: Wudstix on January 18, 2022, 07:05:53 PM
Pics 8 posts above your question. Also these from my initial attempt. From the string colors my 10 Rings on my Big River 21st Century clone longbow. This is after 150-175 arrows.
:campfire: :coffee: :archer2:
Post by: Medley on January 18, 2022, 08:13:40 PM
I may have to give these a try….
Post by: Wudstix on January 18, 2022, 08:16:06 PM
:campfire: :coffee: :archer2:
Post by: Wudstix on January 19, 2022, 06:54:21 PM
Post by: Jim Jackson on January 20, 2022, 07:06:21 AM
Post by: Wudstix on January 20, 2022, 12:12:21 PM
:campfire: :coffee: :archer2:
Post by: Arlo on January 20, 2022, 08:34:04 PM
Well, the real question in my mind is what is it about adding a little puff of yarn to a string that causes it to be quieter? Truth is it isn't about the puff of yarn, as a bit of rubber (string leeches) does the same thing. How about cat whiskers, rubber puffs so to speak!
So what are the physics? Has to be about harmonics right?
So bottom line is it must be about adding a bit of weight to the string at precisely the right location to dampen the strings vibration, not so much as what the weight consists of. :o
I've tried just about every kind of string silencer you could think of at one time or another over the last 32 years. and always go back to rubber cat whiskers. But hunting in the rain has a bit to do with that too.
If you are a fair weather archer that doesn't get your bow wet, there are all kinds of options that work well.
But those wool puffs look like dead rats when they get wet, and do effect the performance when full of water. Rubber cat whiskers don't do that....
Post by: BAK on January 21, 2022, 09:55:03 AM
Post by: Arlo on January 21, 2022, 01:44:17 PM
And Arlo, there was a rather extensive study discussed over on "Trad Talk" some ways back that showed the rubber cat whiskers did a better job than any other medium. It also boiled down to placement, not just what or how much. :coffee:
That doesn't surprise me at all. I didn't go into placement, as that was not mentioned in the original post. But off setting the location top and bottom by 2-3" kills the oscillation and stops the string quicker. I assumed that was a given...
Post by: Terry Green on January 22, 2022, 08:48:06 AM
Post by: BAK on January 22, 2022, 10:09:35 AM
Post by: trad_bowhunter1965 on January 22, 2022, 11:11:41 AM
Post by: Terry Green on January 22, 2022, 12:53:42 PM
Post by: BAK on January 22, 2022, 02:10:01 PM
"OK, let's dive in. First, an explanation of very basic harmonics. Wikipedia says:A harmonic series is the sequence of sounds[1]-pure tones, represented by sinusoidal waves-in which the frequency[2] of each sound is an integer multiple of the fundamental, the lowest frequency.[3]
Your bowstring acts like a guitar string when plucked. It's length, as measured from the contact points on either end creates the fundamental frequency. The 3rd and 5th harmonics are known as the dominant harmonic frequencies. So the dividing points to dampen those two harmonics is each spot where that harmonics at its peak in the sine wave. So for the 3rd harmonic, those points would be 1/6, 3/6 and 5/6 of the string length. For the 5th harmonic, the points would be 1/10, 3/10, 5/10, 7/10 and 9/10 of the string length."
Now that being said, plucking the string from any point midway on the string should still result in a similar wave form as the length of the string remains the same.
Post by: Blacktail42 on January 29, 2022, 05:09:57 PM
Post by: Bamboozle on January 29, 2022, 06:25:17 PM
Post by: Jim Jackson on February 01, 2022, 05:22:50 AM
I remember Lee's findings well. He showed a video of the bowstring being plucked so you could see where the wave lengths were plain as day. He then showed the measurements for maximum wave dampening. And finally, the tell tail decibel level at those two measurements. Lee's findings are still being used after nearly 20 years.
Yep. X2
Post by: Bowwild on February 01, 2022, 07:40:57 PM
I had never heard of the studies mentioned. Glad to hear about them. Frankly, I've always sort of eye-balled and tried to discern sound differences at different placements. I'm going to try this 1/6th string length thing. On a 49" string (52" Thunderbird) it appears I need to have the silencers at 8.16" from the end of the string. From another post, it would seem I need to set one at this distance and the opposite 2-3" different (off-set)?
I do think the bow hush material I bought for a few bows was very effective.
Post by: Wudstix on February 01, 2022, 08:33:31 PM
:campfire: :coffee: :archer2:
Post by: Zeebob on February 01, 2022, 08:53:37 PM
I’m not sure where the best placement is….but I’m happy with my bow now..it’s quiet..
Post by: Wudstix on February 01, 2022, 08:59:22 PM
:campfire: :coffee: :archer2:
Post by: GCook on February 01, 2022, 10:30:20 PM
I put the lower one at one third, upper at one quarter. Seems to work well enough.
Post by: TSP on February 14, 2022, 11:36:42 AM
Nobody ever said the simple stick and string was ACTUALLY supposed to be simple, or easy. :dunno:
Post by: Wudstix on February 14, 2022, 02:47:38 PM
:campfire: :coffee: :archer2:
Post by: jhg on February 14, 2022, 03:26:34 PM
I run catwiskers trimmed down about half their length.
Just to open a can of worms, if you start with a bow design that is inherently quiet, you are already more than half way there before string attachments. Just sayin.
Post by: Part Time Archer on February 14, 2022, 10:01:26 PM
Post by: Wudstix on February 22, 2022, 10:21:55 PM
:campfire: :coffee: :archer2: