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本帖最後由 henrylin424 於 2011-6-30 13:54 編輯 ' f% ^9 [( s& y5 j) N
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網球拍線張力測試器ERT 300(開箱)
7 F6 n1 d) s5 d5 k2 LERT 300 Manual
5 M. O+ e3 e& G P; L2 {, bThe right tension for every type of player
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0 {8 q/ R- O" T JDynamic Tension DT ( DT-value) / DT is the string bed stiffness
( e, ^. [9 m5 B" D3 @, PDT is ball power in kilo pond required to depress the string bed 1 cm at the sweet spot(ball impact)
0 V2 m4 }8 T8 `% PDT determines the playing characteristics power and control.
* J& d1 V+ G# Q& G# cHigher DT for more control / Lower DT for more power! F9 p/ n" _" l5 v4 Q2 y
Not recommended to play tennis when DT below 28
6 x( [" S! ~& WRestring the racquet when the DT-value has decreased by 10% to 20%, u( S5 H" S! ^6 e) [$ _
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Lo DT 28-34 Defensive play / Club
! k8 @, J7 ^0 L3 FMid DT 35-41 Dynamic,offensive play / Club,WTA. x0 P+ A: D3 c/ [ q, w, t3 m/ p6 \
Hi DT 42-46 Fast,aggressive play / Club , WTA , ATP
9 o# q* J% O' g1 F7 bHi+ DT 47-54 Very fast,extremely aggressive play / ATP
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Within the first 2 to 4 hours after stringing, there is often a remarkable tension loss of 2 to 4 DT , called stabilization losses.9 L1 C7 f4 ~4 C/ u- j- M6 b
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在stringforum左方DT database 選擇你的球拍,即可查到相關線種掉磅chart./ E: K1 S; `3 {
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發表於 2011-6-30 11:21:01
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