The Science
Science Built Into Every Shot.
A table tennis blade may look simple, but it is a mechanical system.
During the brief instant of contact, the blade bends, compresses, vibrates, absorbs energy, and returns energy to the ball. Those interactions determine much of what a player experiences as feel, touch, dwell, speed, spin, control, stability, and forgiveness.
The purpose of this project was to understand those interactions well enough to design a blade systematically—rather than discovering one through trial and error.
EXPLORE THE SCIENCE
A Blade Is a Complete System
Most modern blades are layered structures whose playing characteristics emerge from the interaction of the entire construction.
A one-ply Hinoki blade is the notable exception. Because it is made from a single piece of wood, the material itself largely defines the blade.
In a layered blade, however, no single wood, fiber, or measurement determines how it plays.
Its character emerges from the interaction of:
The face wood
The inner plies
The core
The fibers
The thickness of every layer
The position of every material
A thin fiber placed near the surface behaves differently from the same fiber placed closer to the core. A soft face over a firmer interior behaves differently from either material alone. Thickness changes compliance, stability, forgiveness, and weight.
Every design choice affects the others.
That is why the complete construction must be evaluated as one system.
Twenty-One Playing Characteristics
Most blades are described with a few broad labels—fast, controlled, stiff, soft, offensive, or all-around.
That is not enough to explain how a blade actually plays.
The evaluation system developed for this project describes every blade across twenty-one distinct playing characteristics.
The first sixteen describe active play—the shots where the player commits a stroke.
The final five describe defensive or reactive play—blocking, absorbing pace, redirecting the ball, and maintaining control under pressure.
Together they create a far more complete picture of how a blade performs—from the most delicate short touch to the hardest attacking shot.
A blade is not one number.
It is a profile.
The Physics Engine
The number of possible blade constructions is enormous.
Changing the wood species, layer thicknesses, core material, fiber type, fiber placement, or overall architecture creates a different blade. The usable design space contains billions of possible constructions—far more than anyone could evaluate by building prototypes one at a time.
To explore that space, I built a physics-based evaluation engine.
The engine begins with the physical construction of the blade. It models how the structure bends, vibrates, stores energy, dissipates energy, and responds during contact. Those physical behaviors are then translated into the twenty-one playing characteristics.
The model was calibrated against a representative group of measured commercial blades before being used to evaluate new constructions.
The engine does not rely on one definition of the “best” blade. Each twenty-one-characteristic profile is evaluated through eleven scoring systems.
Six emphasize different combinations of feel, pace, control, completeness, and spin. Two reward balance by penalizing uneven profiles or rewarding a high floor. Three evaluate defensive and reactive play, including blocking, absorbing pace, redirecting, stamina, and loaded touch.
RANK combines scores to identify the strongest models for comparison.
The objective was never to find the highest score.
It was to understand the tradeoffs—and identify designs that remained strong across many different priorities.
Feel, Touch, and Dwell
Feel, touch, and dwell are closely related.
They are not the same thing.
Feel is how clearly the blade reports the shot back to your hand through vibration, sound, and sensation.
Touch is precision during low-power shots—pushes, drop shots, short serves, and delicate returns.
Dwell is the brief time the ball remains in contact with the racket.
That contact lasts for only roughly a millisecond.
Yet that millisecond changes everything.
More dwell gives the rubber slightly more time to grip the ball, making spin feel easier and giving the player a greater sense of connection to the shot.
This became one of the project’s most important discoveries.
I began believing I was searching for greater feel.
Eventually I realized I was searching for something deeper.
I was searching for greater dwell.
Separating Two Different Jobs
Balsa has been used in table tennis blades for decades, usually as a thick core that serves as the blade’s primary spring.
The architecture developed during this project uses it differently.
The thin balsa core sits near the neutral axis of the blade, where it contributes very little to bending stiffness. Instead, the outer woods, intermediate plies, and carbon form a structural chassis that carries almost all of the bending load.
The chassis carries the pace.
The balsa performs two different jobs.
First, because it is extraordinarily light, it allows the blade to become thicker without becoming excessively heavy. That extra thickness lets the structural layers sit farther apart, improving stiffness, stability, and forgiveness.
Second, the balsa contributes a controlled through-thickness compression response.
At softer impact it can absorb energy.
At greater impact it can return energy.
These are two different mechanical behaviors.
Separating them became one of the key engineering insights of the project.
Rather than asking one material to do everything, the design allows each material to do the job it performs best.
The outer chassis controls bending, pace, and stability.
The thin balsa core contributes a carefully controlled compression response.
The goal is not simply a balsa blade.
It is dwell without giving up useful pace and stability.
Why the Complete Structure Matters
The engine changed the way I thought about individual materials.
I began the project believing that Hinoki was necessary for exceptional feel.
Hinoki is an extraordinary blade wood.
Its softness and character can make it an exceptional face material.
But in a layered blade, even an exceptional face cannot determine performance by itself.
The layers beneath it determine how much the surface gives, how long the ball remains in contact, how the blade bends, how energy returns, and how stable the racket feels against incoming pace.
Every layer matters.
Every thickness matters.
Every material has a purpose.
The opportunity was never simply to find a better wood or a newer fiber.
It was to engineer how existing materials work together.
From Model to Prototype
A model is not the final authority.
The prototype is.
The engine identifies promising constructions, reveals their tradeoffs, and provides a disciplined reason for building one design rather than another.
But wood is a natural material.
Manufacturing introduces variation.
And some playing characteristics can only be understood when the blade is in a player’s hand.
The project therefore treats uncertainty openly.
Predictions become less certain as a design moves farther beyond the measured calibration data.
When weaknesses were discovered in the original engine, it was not patched to preserve earlier conclusions.
It was rebuilt from the ground up.
The resulting designs were then evaluated again under the new engine. Some ideas survived. Others changed. Better ideas emerged because the new model described contact more accurately.
The engineering guides the prototype.
The prototype tests the engineering.
And when the two disagree, the blade—not the model—provides the answer.
But One Question Remained
By this point, I believed I had taken the internal construction about as far as I could.
The architecture was doing what I had hoped. The prototypes were confirming the model. The blade felt the way I had been trying to make it feel.
But one question kept bothering me.
Almost every modern table tennis blade has essentially the same outline.
Some are slightly rounder.
Some are slightly squarer.
Then Stiga introduced the Cybershape, showing that players were willing to rethink blade geometry.
That led me to wonder:
If we can redesign the inside of the blade…
why are we still assuming the outside is already optimal?
That question became the next stage of the project.
Rethinking Blade Shape
The same engineering process raised another question: if the inside of a blade could be redesigned, why assume the conventional outline was already optimal?
The goal was not simply to make a larger blade. It was to create more useful hitting area without simply adding more blade.
The JMW Arc redistributes virtually the same overall blade area and weight to provide a little more than 6% more area in the primary hitting zone.
MORE AREA WHERE IT MATTERS. NOT SIMPLY MORE BLADE.
JMW Arc compared with a conventional blade.
Solid outline: JMW Arc. Dashed outline: conventional blade.
Green: area shifted into the primary hitting zone. Red: area redistributed elsewhere.
The Result: The JMW Arc
The shape-development work led to one standard JMW production shape: the JMW Arc.
WOW, WOW Plus and WOW Prime each use different internal constructions and have different playing personalities. The Arc is the geometry they share.
Shape alone does not determine speed, spin, control or sweet spot. Those characteristics also depend on the blade’s construction, materials, stiffness, vibration and rubber.
Conventional shape available by special order.