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PostPosted: 18 Feb 2021, 20:14 
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can someone explain the meaning of numbers on the box of DHS Ma Long Blades?

I am sure that the first two numbers are weight and thickness of the blade, but what are the other numbers especially these percentages at the bottom?

IMG-c1de18f02e8f6435f23adaa58691626a-V.jpg [ 210.74 KiB | Viewed 657 times ]

Blade: Butterfly Diode V
FH: Victas VS 401
BH: Dr Neubauer Super Block Extreme

PostPosted: 18 Feb 2021, 20:45 
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Blade: Trinity Carbon
FH: Victas VS > 401
BH: Dr N Troublemaker OX

They are, roughly translated:

Balance position
Rebound height
Rebound height decrease

I'm not sure how these are measured though, and how they're meaningful.

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PostPosted: 21 Feb 2021, 02:54 
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Blade: DHS Hurricane Hao II
FH: DHS Hurricane III NEO Pro
BH: Nittaku FastArc-G1
Very interesting.

I always assumed those lengths were like width and total blade length. I have similar cards for my HH2.

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PostPosted: 04 May 2021, 01:45 
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Balance position would perhaps be where the blade balances, if you put it on a straightedge. Probably measured either from the tip or from the base of the blade. I suppose "rebound height" would be how high a ball bounces off the blade, not sure how high it's dropped from. The "rebound height decrease"? Perhaps how much rebounds decrease comparing the second bounce to the first one?


PostPosted: 04 May 2021, 03:21 
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Product specifications wrote:
序 列 号 :
HL3-FL 18 12
产 品 技 术 测 试 值 :
在 标 准 条 件 下 ( 标 准 温 度 、 湿 度 ) 经 实 验 室 测 试 所 得 数 据
重 量 : 88.5 g
厚 度 : 6.38 mm
平 衡 点 123 mm
弹 跳 高 度 : 221 mm
反 弹 速 度 减 率 69%

Serial number :
HL3-FL 18 12
Product technology Test values :
Under standard conditions ( standard temperature, humidity) Data obtained by laboratory testing
Weight : 88.5 g
Thickness 6.38mm
Balance it out 123mm
Bounce height 221 mm
Rebound speed reduction rate 69%

Be happy
The given value of Reduction of Rebound Velocity 69% as seen on the blade's sertificate should be read as COR 69%.
CoR (index of restitution for racket blade) = V rebound / V dropping

The greater COR will indicate the greater ball rebounding speed for a given blade.

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