To whom it concerns,
As a manufacturer committed to innovation and the advancement of pickleball equipment, we are writing to express our concerns regarding the current PBCoR (Paddle Ball Coefficient of Restitution) test protocol. While we appreciate the effort to standardize paddle performance evaluation, we believe the current protocol has significant limitations that could hinder the development and adoption of paddles with advanced designs and technologies.
Our concerns stem from the following observations:
* Oversimplification of Mass Properties: The current protocol reduces the complex concept of mass to a single, static value. It calculates the moment of inertia (MOI) based on the balance point and center of percussion, assuming a uniform mass distribution. This approach neglects the intricate 3D mass distribution within a paddle, especially those with foam-filled cores or other non-uniform internal structures. This oversimplification can lead to inaccurate MOI values and misrepresent a paddle's true performance characteristics during a dynamic swing.
* Neglect of Effective Mass: The protocol fails to consider the dynamic nature of effective mass (Meff). Meff, which accounts for the apparent mass of the paddle during motion, is crucial in understanding a paddle's power and stability. Its omission may lead to an incomplete assessment of a paddle's performance, as it doesn't capture how the paddle's mass interacts with the player's swing and the ball's impact.
* Inconsistent Treatment of Rigidity: The protocol assumes rigidity for certain calculations, such as MOI and COP, but seemingly purports that elasticity and rigidity are the primary movers of ball velocity be coming too high. Why aren't these opportunities to measure and test this taken?
* Misapplication of Coefficient of Restitution: The coefficient of restitution (COR) is not a fundamental material property and can vary based on impact conditions. Using it to cap ball speed or energy may not be an effective way to regulate paddle performance, as factors like swing speed and impact location also play significant roles. You will be laughed at you will not be considered a professional sports body.
* Bias Against Innovative Designs: The cumulative effect of these limitations is a potential bias against innovative paddle designs. By not fully considering mass distribution, Meff, flexibility, and the limitations of COR, the protocol may favors paddles with simple, uniform mass distributions and rigid structures. This could discourage manufacturers from exploring designs that utilize advanced materials, geometries, and flexibility to enhance performance.
Recommendations:
To address these concerns and promote innovation in paddle technology, we propose a comprehensive review and revision of the PBCoR test protocol. The revised protocol should:
* Incorporate Advanced MOI Measurement: Implement techniques like 3D scanning or multi-point mass measurements to capture the intricate mass distribution within a paddle, leading to more accurate MOI values.
* Include Effective Mass Analysis: Develop testing procedures that measure paddle performance during actual swing motions, capturing the influence of Meff on ball impact and rebound velocity.
* Incorporate Flexibility Measurements: Include tests to quantify paddle flexibility, such as measuring deflection under load or assessing vibrational characteristics.
* Re-evaluate the Use of COR: Consider alternative methods for regulating ball speed or energy that account for factors beyond the paddle's COR, such as swing speed and impact location.
* Encourage Simulation and Modeling: Promote the use of simulation tools to predict a paddle's Meff, flexibility, and overall performance based on its design, allowing for a more comprehensive evaluation of different designs.
We believe that incorporating these recommendations into the PBCoR test protocol will lead to a more accurate, comprehensive, and unbiased evaluation of paddle performance. This will foster innovation, encourage the development of advanced paddle technologies, and ultimately benefit players by providing them with a wider range of high-performing equipment options. We are committed to working with USAP to ensure the continued growth and advancement of pickleball equipment technology.
Sincerely,
Brian Laposa
CoreTek Pickleball
