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Centrifugal governors are used in many modern repeating watches to limit the speed of the striking train, so the repeater does not run too quickly. Another kind of centrifugal governor consists of a pair of masses on a spindle inside a cylinder, the masses or the cylinder being coated with pads, somewhat like a centrifugal clutch or a drum brake.
A governor, or speed limiter or controller, is a device used to measure and regulate the speed of a machine, such as an engine.. A classic example is the centrifugal governor, also known as the Watt or fly-ball governor on a reciprocating steam engine, which uses the effect of inertial force on rotating weights driven by the machine output shaft to regulate its speed by altering the input flow ...
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This is achieved by use of a constant-speed unit (CSU) or propeller governor, which automatically changes the propeller's blade pitch. Most engines produce their maximum power in a narrow speed band. The CSU allows the engine to operate in its most economical range of rotational speeds , regardless of whether the aircraft is taking off or cruising.
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Description: Loaded centrifugal governor (New Catechism of the Steam Engine, 1904).jpg: Source: Scan from Hawkins (b.1833), Nehemiah (1904 edition of 1897 book. Originally published in 1897, later expanded to cover internal combustion engines.)
"Balls to the Wall" The phrase originates from the steam centrifugal governor. Since the spinning device could be dangerous, it was enclosed in a cylinder whose inside diameter matched the full speed of the device. When a steam engine, which used this governor, was pushed to full throttle it was said to be "balls to the wall."
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