Principles
The aforementioned reciprocating balance on the wheels attempts to prevent the worst of the reciprocating forces at play on a locomotive, though as a compromise, this extra mass on the wheel causes it to be out of balance vertically, therefore creating hammer blow. Therefore, if reciprocating balancing is increased, it may appear that a locomotive is running smoothly, but at a high cost in hammer blow, especially at high speeds.
Locomotives are balanced to their individual cases, especially if several of the same design are constructed (a class). The normal operating speed is ascertained, resulting in each class member being balanced accordingly. Usually the reciprocating weight is balanced between 45 to 50% of total balance weight. High speed locomotives were the key recipients of such treatment due to the increased level of forces involved, and the exponential factor of stress on the track at these higher speeds.
Read more about this topic: Hammer Blow
Famous quotes containing the word principles:
“Syntax is the study of the principles and processes by which sentences are constructed in particular languages. Syntactic investigation of a given language has as its goal the construction of a grammar that can be viewed as a device of some sort for producing the sentences of the language under analysis.”
—Noam Chomsky (b. 1928)
“The proposition that Muslims are welcome in Britain if, and only if, they stop behaving like Muslims is a doctrine which is incompatible with the principles that guide a free society.”
—Roy Hattersley (b. 1932)
“In her present ignorance, woman’s religion, instead of making her noble and free, by the wrong application of great principles of right and justice, has made her bondage but more certain and lasting, her degradation more hopeless and complete.”
—Elizabeth Cady Stanton (1815–1902)