Today, in order to be used in a National Football League game, a football must meet the following requirements: It shall consist of a urethane bladder inflated to 12.5 to 13.5 pounds and enclosed in a pebble grained, tan leather outer shell designed to provide a good grip – even in the rain. The ball must be 11-11.25 inches long, have a long circumference between 28- 28.5 inches, a short circumference between 21-21.25 inches; and it must weigh 14 to 15 ounces. The variation in the measurements is due to the fact that all NFL footballs are made by hand. Since 1955 every NFL football has been made at Wilson’s 130-person factory in Ada, Ohio, which produces up to 4,000 footballs a day.
The white lines on a football were put there for night it e visibility.
Stitching through a piece of sandpaper is an effective way
to sharpen a sewing machine needle.
No comments:
Post a Comment