United States of America
Usually, North American locomotives have sand that can be dumped out either in front of or behind the trucks of a locomotive. In modern diesel locomotives there is a button that the driver will press to start sand dump. This button is tied to a computer system that determines the train's direction and where the sand should be applied: either forward or aft of the trucks. In older locomotives, though, there was a manual lever attached to a valve that had three positions: Off, Forward, and Aft. The engineer could flip this lever to dump sand in correspondence with the train's movement.
Read more about this topic: Wheel Slide Protection
Famous quotes containing the words united states, united, states and/or america:
“... when we shall have our amendment to the Constitution of the United States, everyone will think it was always so, just exactly as many young people believe that all the privileges, all the freedom, all the enjoyments which woman now possesses were always hers. They have no idea of how every single inch of ground that she stands upon to-day has been gained by the hard work of some little handful of women of the past.”
—Susan B. Anthony (1820–1906)
“It is said that the British Empire is very large and respectable, and that the United States are a first-rate power. We do not believe that a tide rises and falls behind every man which can float the British Empire like a chip, if he should ever harbor it in his mind.”
—Henry David Thoreau (1817–1862)
“I make this direct statement to the American people that there is far less chance of the United States getting into war, if we do all we can now to support the nations defending themselves against attack by the Axis than if we acquiesce in their defeat, submit tamely to an Axis victory, and wait our turn to be the object of attack in another war later on.”
—Franklin D. Roosevelt (1882–1945)
“Fortunately, the time has long passed when people liked to regard the United States as some kind of melting pot, taking men and women from every part of the world and converting them into standardized, homogenized Americans. We are, I think, much more mature and wise today. Just as we welcome a world of diversity, so we glory in an America of diversity—an America all the richer for the many different and distinctive strands of which it is woven.”
—Hubert H. Humphrey (1911–1978)