So you are arguing that spin shots engage the topsheet and sponge more and that can make them faster? Even with all things equal?
The statement I originally quoted made a conservation of energy argument, implicitly assuming that the amount of energy transferred to the ball was determined only by the impact ("arm") speed.
Highly unlikely. While the topsheet and upper sponge layer do store some tangential elastic energy through shear and stretch, this energy is returned far less efficiently than the normal compression energy from the sponge. So for a given racket speed, an oblique (topspin) impact returns less total mechanical energy (spin + speed) than a flat hit.
I wouldn't be so sure. The direct (normal) compression of the sponge may be more efficient at storing and returning translational force to the ball, but tangential shear/stretch of the rubber is key for storing and returning the incoming ball's rotational energy, which is often significant.
How can you feel the same stiffness and still experience more flex? Those two statements are contradicting each other. Do you actually mean you experience more "dwell" with a softer blade?
You’re right that the sponge and topsheet are coupled and that their behavior is nonlinear with impact speed, so no single efficiency applies across all conditions. But there's a big difference here. Normal compression of the sponge stores and returns energy far more efficiently than tangential shear or stretch of the topsheet. The reason is structural. The sponge is a cellular foam whose cells act like miniature springs—large, reversible deformations with relatively low internal friction—so most of the compression energy is returned as rebound speed. The topsheet is a solid viscoelastic rubber; tangential stretch and shear involve molecular sliding and frictional losses, so much of the energy turns into heat rather than restored motion. Tangential compliance is crucial not for storing and returning rotational energy, but for allowing frictional torque to act long enough to change the ball’s spin.
Has anyone got any comparisons of zyre with D05 specifically on the bh. It’s a expensive rubber to test and not like lol…
Its not a forehand or backhand thing. The dwell time on Zyre is relatively short compared to Dignics and takes some adjusting to. Some pros have not made the change successfully, LYJ reversed it, Diaz reversed it. So it is very much a personal choice whether one wants to make the change or not.
I will try a bit and will give some detailed input to that later or so. My prediction: it will be too fast for my current BH so I most likely wont use it there, I lack the consistency there and every other shot wont land near the table. Or it will harm confidence.
The funny thing is if you brush thinly without too much power, you can get good slow spin results. It just isn't how you would quite play the shot with Dignics. And that might initially frustrate you. It is not a bad idea to play weaker players with it and relearn attacking empty balls.
Easy: all wood blades are way less hard due to not use fibers, carbon or fibers hard the feeling and eliminate the flex (more or less depending de fiber & where is used outer or inner).
Honest review, my advice is to try 2.5 version, also use several hours to bourn in and get the maximum of the rubber, don't use the same motion like H3N use only waist, don't use knees and power from the ground like with H3N, impact angle between 35-45º depending how comes the ball and enjoy.
Yes, that is my point. You stated in previous post that, I quote: "I feel the same stifness using Infinity VPS like using ALC or similars, the difference is Infinity is way less hard so a lot of more flex than ALC or similars.".
For spin, I would say it depends on technique and playing approach, though I agree most people would find D05 to be more controlled and Z03 faster and more powerful. But spin is definitely technique/style dependent.
