The limb noise is really noticeable on my 60" recurve (Predator Hunter). The string is quiet but the limb really hums. My short recurves don't do that at all.
Anybody else notice more noise with longer limbs on recurves or am I just lucky? What can be done to quiet things down?
What type of string is on it?
homebru
It has an SBD 8 strand with beaver balls
Contact the young ladies at Bow Hush...bet they can provide a fix
DDave
Limb Savers are great if you can stand the looks.
Are beaver balls evenly spaced? Usually put that way. Slide the bottom silencer up the string 4-6 inches. Will look weird but seemed to help quiet my recurves. There's a word for it....but doesn't come to mind.
I would not consider 60" a long recurve ... are you padding the limb tips ? I would switch to wool or cat whiskers for the string and pad the limb tips. If that does not work try adding limb savers too. I have never had a Predator bow but have had many 60" bows and the above suggestions worked well.
Measure the length of the string where it touches the limbs and divide by 4, then place your silencers at that measurement down from each limb tip where the sting makes contact. So if you have a 56" measurement put your silencer 14" down from where the string contacts the limb.
Good luck ...
Search- heterodyning. Well put elkken
Thanks guys!
Try adjusting your brace height. There seems to be a sweet spot for some bows to be their quietest.
X2 on Walter Mauney's advice. All good stuff above but getting the brace height perfect before adding and silencers will be the best place to start imo. Every bow will shoot best at a particular brace - even for different shooters and draw length. Start with taking it as low as you can until it gets loose(may be where you are at) Then bring it back up a few twists at a time until it gets solid. Add string silencers and put them at thirds of the distance from where the string touches the limb - not the string length. They will look deeper(closer to center) than most are used to but this is where they will do their best work. It is a physics thing and has to do with harmonics. Perfect is dead center but that is obviously not an option so thirds is 2nd best. If it is not as quiet as you want at this point add limb savers to the inside of the limbs at the fades. If all this does not work get heavier arrows or a new bow.
I've done brace height adjustments and it has very little effect on this bow, it sounds the same throughout the range. This bow just has noisy limbs. And it's just this particular bow. It's a hummer and mostly from the limbs not the string.
Sounds like a good candidate for limb savers to me. Yeah, ugly and not "traditional" to most; but they work for me on recurves.
another way too it is to add a stabilizer bushing and put on stubby rubber limbsaver on her and yes the others are right on ,, different string and try higher brace hight is the starting point then limb savers then the stabilizer bushing if these don't help trade the bow
I've found that different bows like different string materials. Even using a string that works well on one recurve will not have the same effects on another recurve. I had a recurve that was noisy with d97 but an xs2 string wss really quiet.
Dont know why but it made a big difference.
Limbsavers after you get everything else as good as you can.They definatly work!
Put them 3-4 inches above the fadeouts of the riser.Ihave played with them alot and for me this is where they should go on a (traditional bow limb).They will dampen limb vibration very well thier.Better than at the fadeouts or near the limbs ends where the instructions say to put them
I even use them on my hunting bow that is already quiet without them to make it virtually silent.
Talk to Pierre from SBD. I am sure he is willing to help and probably can solve this for you. Maybe you don't have the right string length.
I have 8 strand SBD strings on my 62 inch recurves and a 6 strands string on my 62 inch hybrid longbow. No issues at all. I shoot between the 8.8 and 10 gpp.
QuoteOriginally posted by Flying Dutchman:
Talk to Pierre from SBD. I am sure he is willing to help and probably can solve this for you. Maybe you don't have the right string length.
I have 8 strand SBD strings on my 62 inch recurves and a 6 strands string on my 62 inch hybrid longbow. No issues at all. I shoot between the 8.8 and 10 gpp.
I have 8 strand SBD's on all my bows and the Predator is the only one that makes any noise at all. It's also my only 3 piece TD bow....
heterodyning helped me with a Shrew Scout recurve. made a substantial difference when compared to equal silencer spacing.
QuoteOriginally posted by Paul_R:
QuoteOriginally posted by Flying Dutchman:
Talk to Pierre from SBD. I am sure he is willing to help and probably can solve this for you. Maybe you don't have the right string length.
I have 8 strand SBD strings on my 62 inch recurves and a 6 strands string on my 62 inch hybrid longbow. No issues at all. I shoot between the 8.8 and 10 gpp.
I have 8 strand SBD's on all my bows and the Predator is the only one that makes any noise at all. It's also my only 3 piece TD bow.... [/b]
My RER and Phoenix are 3 pce TD's as well. No issues.
My Chek-Mate takedown has a similar issue...all it took to fix it was stick on polar fleece in the upper string groove...simple fix
DDave
QuoteOriginally posted by old_goat2:
Limb Savers are great if you can stand the looks.
This is a good solution for some bows.
unfortunately there are quite a few limb designs out there that do not have enough tension on the string at brace (Pre Load) to stop the limbs clean.
So instead of transferring the stored energy in the limbs to the arrow shaft, a lot of that energy stays in the limb, and the limbs oscillate. this causes unwanted vibration, and often times noise, or that hum you are referring to.
Some of these bows just adding additional brace height can help out a lot. some of them it wont help at all. The tough ones are the lighter weight under 50# recurves that have limb bulge issues. This results when the pre-load is fine, and the limb tips are stopping dead, but the middle portion of the limb continues forward in a bulge.
Limb savers are excellent for limb bulge issues. they should be located right above and below the fade area of the wedges to do the most good and not rob your performance.
Hope this explanation helps.... Kirk
Kirk - That helps a lot and I think you nailed it, thank you! This bow is in fact 40#. When you say the limbsavers should be located above and below the fade area of the wedges do you mean above on the top limb and below on the bottom limb? Sorry I'm lost without pictures... :dunno:
Edit: I'll add that I hetrodyned the beaver balls using the 1/4 - 1/3 method and it helped a lot, thanks for that tip guys! There's still a little buzz but nothing like the humming it was doing before.