<sod>A '''governor''', or '''speed limiter''', is a [[machine|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 [[James Watt|Watt]] or fly-ball governor, which uses weights mounted on arms to determine how fast a shaft is spinning, and then uses [[proportional control]] to regulate the shaft speed.<eod>
<sod>A '''governor''', or '''speed limiter''', is a [[machine|device]] used to measure and regulate the [[speed]] of a [[machine]], such as an [[engine]].  <eod>