Controls
Some "B" units cannot be moved without a controlling unit attached, but most have some simple controls inside, and often a side window at that control station. For example, B unit versions of the EMD FT with conventional couplers had a fifth porthole-style window added on the right side only for the control station. Other models used existing windows. These controls enable a hostler to move the B-unit locomotive by itself in a yard or shops. (A hostler is an employee permitted to move locomotives within the confines of a yard or shops complex, but not on the main railroad.) B units without controls are generally semi-permanently coupled to controlling units. Sometimes, there is a terminology distinction between the types: a booster is a B unit with hostler controls, and a slave is a B unit without hostler controls.
Read more about this topic: B Unit
Famous quotes containing the word controls:
“If the Party could thrust its hand into the past and say of this or that event, it never happened—that, surely, was more terrifying than mere torture and death. ... “Who controls the past,” ran the Party slogan,”controls the future: who controls the present controls the past.””
—George Orwell (1903–1950)
“The confusion of emotions with behavior causes no end of unnecessary trouble to both adults and children. Behavior can be commanded; emotions can’t. An adult can put controls on a child’s behavior—at least part of the time—but how do you put controls on what a child feels? An adult can impose controls on his own behavior—if he’s grown up—but how does he order what he feels?”
—Leontine Young (20th century)
“Who controls the past controls the future: who controls the present controls the past.”
—George Orwell (1903–1950)