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Thread: String tension and power
10-17-2008, 01:26 PM #1
String tension and power
Hi everyone, this is my first post, so be kind .
But anyway, here goes: on the internet, I have read many conflicting articles about whether lower or higher tensions help the same racket to generate more power. I have a Nanospeed 9000X that I am considering experimenting with and would like to know which way I should adjust the tension. I already know that to increase power you should work on technique but my technique is already good and my smash quite fast, I'd just like to have a little bit more of an advantage.
My Nanospeed has had some lead tape added to make it (very) head heavy as I'm an attacking player and the strings are the last thing I need to sort out. Maybe there are some physicists among us, or genuine badminton geniuses who could tell me whether higher or lower tensions generate more power.
Thanks in advance,
10-17-2008, 01:40 PM #2
The higher the tension, the lower the power
The lower the tension, the higher the power
But going high ( at certain level ) can make shot more accurate
But if you are about all out attacking type, lower tension is reccomended.
1. More bounce effect, more repulsion, more power
2. Lot more durability lasting than higher tension
3. Louder and crisp sound at full power smash
Last edited by -Berg; 10-17-2008 at 01:47 PM.
10-17-2008, 02:04 PM #3
It is often argued that high string tensions improve control, whereas low string tensions increase power. The arguments for this generally rely on crude mechanical reasoning, such as claiming that a lower tension string bed is more bouncy and therefore provides more power.
10-17-2008, 03:06 PM #4
If you want a reason based on physics for "low tension == more power", it would have to be the concept of impulse. As the shuttle is being hit by a lower tension string, it will remain in contact with the strings for a longer period of time (dt). Since you are swinging the racket with a constant force (F), the impulse (I = F*dt) will be larger since the time will be longer. You can think of impulse as the change in momentum of the shuttle, and of course with more momentum the shuttle will move away from the racket faster.
Having said that and being quite confident that it's true... I want to say that the effect shouldn't be enormous. Proper swing form and a head-heavy racket will be more effective in increasing the speed of the shuttle. I mean, if there really was a huge power loss going from 20lb to 30lb tension, then professionals would not play with 30lb+.
10-17-2008, 03:14 PM #5
10-17-2008, 03:24 PM #6
10-17-2008, 09:56 PM #7
Within your "playable" string tension:
within the upper range, you will sacrifice power, but you will gain better touch and feel
within the lower range, you will gain power but lose control.
This only applies to within your playable range. If you are too high, you lose power and control, if you are too low, you lose power and control too.
The best thing is to find a range in which you feel comfortable playing, and pick the lower end of the range for power.
10-17-2008, 09:57 PM #8
10-18-2008, 02:22 AM #9
Thanks for all of your replies. I guess the only way to find out which tension will suit me best is just to play with different tensions. Right now I have the nanospeed strung at 26 lbs, I know that the Yonex recommended tensions are fairly low but what are the limits of the racket? I'd be too scared to go over 30 lbs but at 28-30 lbs would the racket be OK?
10-18-2008, 09:14 AM #10
I dont know why but i myself or probably others that r used to high tension,might not be able to smash hard enough if the tension is much lower than our preffered tension.My preferred tension is around 28lbs.
10-18-2008, 03:05 PM #11
1) The increased impulse from the shuttle being in longer contact with the lower-tensioned strings.
2) The higher energy transfer from a more perfect elastic collision as a result of higher-tensioned strings.
(1) and (2) are related, the force during impact is not constant, the strings are like a spring, the force versus time will look like an arch. Lower-tensioned strings will give a wider (longer in time), but shorter (less force) arch. Higher-tensioned strings will give a narrower (shorter in time), but higher (more force) arch. The area under the arch is the change in momentum of the shuttle, a larger area will mean that the shuttle is hit away faster.
Putting it all together... I really haven't figured out how much (1) and (2) will cancel each other out... But judging from other people on this forum, my own experiences, and professional players, it seems like (2) will dominate a bit in the end, with skill.
10-19-2008, 03:41 AM #12
If you just look on the surface of things, it will appear that looser strings generate more power. However, if you look at the more advanced physics, you will find that tighter strings generate slightly more power but this comes with a proviso, if you can use high tensions, fine but if not, then you'll still generate more power with looser strings.
10-19-2008, 06:07 AM #13
Playable player for medium player is average at 25 -27 lbs
10-19-2008, 11:45 AM #14
Personally, i think that there is a tension where more you'd be able to draw better power. for me, i think this is betwee 24-26 lbs. under 23 lbs is sometimes hard to draw power. over 27 is hard as well...
my reasoning is because if the string is too lose, it will not spring back into shape with as much force as a tighter string. if tension is too high, you would not be able to make an indent into the string bed to force the string to assist you with more power. i'm sure if you pick up some physics book about force or something... just conceptually think about it, you'd draw your own conclusion. in these equations above, those are really only for static items. your super ideal cases. in real life. there are many other factors that add into it. string elasticity, application force, racket frame stiffness, etc.
10-19-2008, 12:09 PM #15
Static items? Interesting counter-argument when I've been talking about collisions. Please tell me where I've made "super ideal" assumptions. And please show me a physics book that takes into account all "real life" factors. We are only concerned about the tension in strings, string elasticity, application force, and racket frame stiffness do not apply.
10-19-2008, 12:12 PM #16
If you already have high tenison say 26-28, then restring it to 24-26, 22-24 and even 20-22 and make comparison, wouldn't this be more logical ?
10-19-2008, 12:22 PM #17
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