RPM is the acronym used for revolutions per minute. It measures the number of revolutions completed in one minute around a fixed axis, giving the speed of a mechanical component. It is commonly used to describe the performance of automobile engines.
Like most ballparks built from the 1990s onward, Safeco Field is a 'retro-modern' style ballpark that incorporates many of the features of ballparks built in the 1950s and earlier with modern amenities.
As a solution to this new problem, the stadium owners and engineers decided to replace the grass with the first ever artificial playing surface. This was a green carpet made of nylon fibers. The surface was installed for the baseball season of 1966 and a new era was born. Synthetic turf, the first generation.Synthetic turf carpet was introduced to Europe in 1970. But this carpet was different. Instead of nylon fibers, it was made of a different synthetic fabric: polypropylene. kick in the grass. After the arrival of the fields spread with sand, scientific and technological advances led to a new type of field. The third, and current, generation of synthetic turf. And, as a happy bonus, the new synthetic fields look more like natural grass as well.