How many twist on your recurve String?
How many Twists on your Recurve strings?
First of all, we would like to thank GEORGE TEKMITCHOV, EASTON SR. ENGINEER & TARGET PRODUCT MANAGER for the Easton Archery Blog he made times ago and where we learn more about how many twist on your recurve String.
- BUILDING THE PERFECT STRING
Even the very finest string materials can be wasted, if certain elements of string construction are overlooked. Well-constructed bowstrings all share a number of key features which enhance performance, durability, and reduce variability over time. One of the most important of these is the consistency of strand tension during construction. Incorrect or uneven individual strand tension can cause the string to change in unpredictable ways, especially when going from cool to warm conditions. Incorrectly tensioned strands can even cause an imbalance, causing the string to load at different rates from shot to shot. This is partly related to the fact that strings experience peak loads of many hundreds of pounds for brief moments when the limbs recover.
One trick to help ensure that a well-made string is going to have good strand tension distribution in use, is to take all twists out of the string, string your bow (yes, the brace height will be low) and let it sit overnight. You can also take a few shots with the untwisted string with an arrow on a relatively close target. This will help force the tighter strands to stretch a little and allow the looser strands to take up their share of the load.
- COME ON BABY, LET’S DO THE TWIST
When re-twisting to achieve correct brace height, be sure to twist in the direction that tightens the center serving. You can determine this immediately on an un-tensioned string simply by grasping each end of the served area between thumb and forefinger, and twisting. One direction will be harder than the other. Twist into this direction.
Twist rate (twists per unit length) can also have a significant impact on string performance. Too few twists often makes for a noisier, harder to tune string, because any slight strand tension variability is amplified, and the string has less “give” to help with reducing noise and vibration after the shot.
On the other hand, too many twists may reduce performance and may lead to a string which is more prone to stretching with use, or prone to tangling when unstrung. With that said, strings can work well with a fairly wide range of twists, for example for a 68” string, anywhere from 20-60 twists will produce acceptable results as long as the bow’s brace height (string height) is correct. Some shooters using Vectran blend strings, or even straight HMPE strings, like the feel of more twists. It seems that for a well-made string, the total number of twists isn’t terribly impactful on scoring potential, when the rest of the system is properly tuned.
Simon Fairweather, for example, had more than 80 twists in the string he used to win the 2000 Olympic Games, and Brady Ellison typically runs 50-70 twists.
Generally more twists will slow the bow slightly and potentially produce much less noise, while fewer twists will add a tiny bit of speed, but potentially more noise and vibration after the shot.
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