The Trionda World Cup Challenges Traditional Aerodynamics

Development of official football of 2026 World Cup it could be the indication of how many 104 matches will be played during the tournament. According to a new study, the ball called “Trionda” is the first in the history of the men’s World Cup to be made with only four panels, which change the way they cut through the air and change the ball’s speed, direction, and volume.

As it has been done every four years since 1970, Adidas unveiled the official football for the 2026 World Cup in October last year. The Trionda attracted attention for its appearance and a three-color scheme representing the United States, Mexico, and Canada, the countries that will host this year’s cup, but it also raised doubts due to its design of four panels connected by heat and glue, a configuration that called into question the stability of the ball on the field.

John Eric Goff, visiting professor of physics at the University of Puget Sound and co-author of the study on the ball’s motion, explained in an article published in Discussion that “smaller panels would show a shorter overall seam length, and therefore, a smoother surface.” And the smoothness is important because the thin boundary of the air that adheres to the surface determines where the flow splits, the size of the formation, and the amount of surface drag.”

The “Jabulani” ball, which was used in the 2010 World Cup in South Africa, had the same characteristics that during the game there was an unexpected change in the direction of the ball or a sudden drop in speed in flight. In an attempt to combat this, Adidas incorporated a deep weave, three prominent grooves on each unit, and a design designed to improve flight stability in the Trionda.

Goff and his colleagues investigated whether these changes were sufficient to prevent the errors Jabulani observed. To do this, they tested the Triwave in a series of wind tests, a method used to analyze the flow of air and objects on the ground under different conditions. These tests made it possible to measure the force coefficients of the ball, i.e. the parameters that describe the shape air creates drag and adjust the stability of the aircraft.

In addition, the researchers analyzed the so-called “aerodynamic drag crisis,” which occurs when air resistance suddenly changes when certain flights arrive. The results obtained by Trionda were compared with similar results from previous World Cup balls: Al Rihla (2022), Telstar 18 (2018), Brazuca (2014), and Jabulani (2010).

The tests showed that the Trionda will reach its maximum aerodynamic drag at speeds approaching 43 kilometers per hour (km/h). This number is below the 50 to 65 km/h recorded by Adidas’ Al Rihla, Telstar 18, and Brazuca, and the 79 to 97 km/h achieved by Jabulani.

Courtesy of Adidas