Figure 3
Source publication
Paddle, padel or platform tennis is a rapidly growing sport derived from tennis, but played in smaller courts using a solid racquet, instead of a strung one. Most of the racquet manufacturers drill holes in the head arguing improved aerodynamic performances. The question is, if almost all manufacturers drill aerodynamic holes, are they optimally di...
Contexts in source publication
Context 1
... total of six different racquet head configurations were considered, namely racquet models R0, R1, R2, R3, R4 and R5, as depicted in Figure 3. Each one had a different porosity and a different porosity distribu- tion, resulting from different hole patterns. ...
Context 2
... seen in Figure 4, where a total of four radii appear indicated, one for each row of holes in the racquet head. d m is the mean of all the rings participating in each con- figuration presented in Figure 3. For example, d m , in configuration R4, is the mean diameter resulting from the two outer circles, that is twice (50:5 + 39:1)=2. ...
Context 3
... means that there is a clear relationship between the location of the holes and drag, and therefore, it is not only a question of porosity. The best two configura- tions are racquet models R2 and R4 (see Figure 3), which are the models with the holes distributed in the outer part of the racquet head. Model R3 is the closest to the generic commercially available racquet, and it is curiously the one that produces the largest drag. ...
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Citations
... There are discussions about the better distribution of the holes in the racket faces. In [6], the flow physics of padel rackets with different hole configurations are studied and tested with the conclusion that the actual design lacks scientific attention and could be optimized with holes in the outer part of the head instead of the center. A padel racket comprises two parts, the head and the handle. ...
Although the moment of inertia of padel rackets is one of their fundamental properties and of particular interest to the players, hardly any manufacturer specifies the parameter for its rackets. The present paper offers a solution to determine the moment of inertia around different axes of padel rackets and makes a standardized comparison possible. After a short overview of the physical background of the problem and the existing solutions for inertia testing, the developed concept for a test stand is described in detail. The approach uses the fact that a pendulum swings with its natural frequency, which depends directly on its moment of inertia. The inertia can be calculated by measuring the cycle time of the swing. Two different test stands, a trifilar and a swing pendulum, are designed to enable an oscillation of the rackets with different rotation axes, and an acceleration sensor is used to measure its natural frequency. A user-friendly interface acquires and processes accelerometer data providing inertial moments. A calibration model defines sensor accuracy. Precision is estimated by calculating the influence of the measurement errors and by testing the repeatability. The maneuverability parameter is created, and in the last step, various rackets are evaluated to create a database with the main properties. As a result of the study of the racket population, a maneuverability parameter is proposed to classify the rackets in a comprehensible way for users. The classification method is tested with users to explore the matching between the scientific classification and the player’s feelings. The results are shown and explained.
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