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Trick question about sponge hardness and flex

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vanjr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote vanjr Quote  Post ReplyReply Direct Link To This Post Posted: 05/04/2021 at 8:07am
I think one premise to the question is wrong. I do not believe any one "does not have the power" to adequately use the harder sponge. I think many "do not have the technique" to appropriately use certain equipment combinations. 

I also agree with the blade stiffness/flex and hard/soft are different attributes of a blade. Lastly we talk about sponge hardness, but it really is sponge and topsheet hardness that matter. We never compress one without the other. 

Fun discussion. 
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zeio View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zeio Quote  Post ReplyReply Direct Link To This Post Posted: 05/06/2021 at 5:20am
The buckling could reduce the contact area when the deformation transforms from a disk shape to a ring shape as the velocity increases.

When ONE independent variable is changed, MULTIPLE dependent variables could get affected, and the relationships do not necessarily have to be linear. The assumptions we FEEL to be TRUE and INTUITVE may in fact be non-physical. At this point, we just don't have enough data to tell how deformation distributes among the ball, rubber, and blade during an impact for different rubbers of different hardness and thickness etc. We can't even tell if "topsheet spin" and "mechanical spin" are how tacky and grippy rubbers actually work, respectively.
Viscaria FL - 91g
+ Neo H3 2.15 Blk - 44.5g(55.3g uncut bare)
+ Hexer HD 2.1 Red - 49.3g(68.5g 〃 〃)
= 184.8g
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tom View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote tom Quote  Post ReplyReply Direct Link To This Post Posted: 05/06/2021 at 9:25am
Originally posted by zeio zeio wrote:

The buckling could reduce the contact area when the deformation transforms from a disk shape to a ring shape as the velocity increases.

When ONE independent variable is changed, MULTIPLE dependent variables could get affected, and the relationships do not necessarily have to be linear. The assumptions we FEEL to be TRUE and INTUITVE may in fact be non-physical. At this point, we just don't have enough data to tell how deformation distributes among the ball, rubber, and blade during an impact for different rubbers of different hardness and thickness etc. We can't even tell if "topsheet spin" and "mechanical spin" are how tacky and grippy rubbers actually work, respectively.
so with the above stmts, a lot of  the dynamics of the rubber is still unknown to us, and although it is fun to have all kinds of discussions, we should still trust what equipment works best  for us (in reality)
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