New designing and manufacturing of football and futsal balls for deviation straight path

The purpose of this paper is design and produce devices with simple user, in order to use the one test in the eight test of FIFA, to measure the amount of deviation from the straight path in football and futsal balls. Examined question is seize the numerical value of the deviation from the straight path in terms of degree scale between the different sizes of ball access at various clubs. While reating an appropriate differentiation in terms of quality and validation among balls, it also will affect in the quality of games. The important matter in this device is, its simple user type and way to use it, which ensures easy use for sports clubs and balls providers.

کلیدواژه ها:

football and futsal balls ، deviation from the straight path test ، design and construction ، sports engineering