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Что (кто) такое Tachometer - определение

MEASURING DEVICE USED TO MEASURE ROTATIONAL SPEED

Tachometry; Tach; Hourmeter; Hour meter; Hours meter; Revolution counter; Rev counter; Revolution counters; Revolution-counter; Revolution-counters; Revolutioncounter; Revolutioncounters; Tachometers; Tach generator; Shaft tachometer

Tachometer

·noun An instrument for measuring the velocity of the blood; a haematachometer.

II. Tachometer ·noun An instrument for measuring the velocity, or indicating changes in the velocity, of a moving body or substance.

III. Tachometer ·noun An instrument for measuring the velocity of running water in a river or canal, consisting of a wheel with inclined vanes, which is turned by the current. The rotations of the wheel are recorded by clockwork.

IV. Tachometer ·noun An instrument for showing at any moment the speed of a revolving shaft, consisting of a delicate revolving conical pendulum which is driven by the shaft, and the action of which by change of speed moves a pointer which indicates the speed on a graduated dial.

tachometer

[ta'k?m?t?]

¦ noun an instrument which measures the working speed of an engine, typically in revolutions per minute.

Tachometry

·add. ·noun Measurement by a tachometer; the science or use of tachometers.

Википедия

Tachometer

A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.

The word comes from Greek τάχος (táchos "speed") and μέτρον (métron "measure"). Essentially the words tachometer and speedometer have identical meaning: a device that measures speed. It is by arbitrary convention that in the automotive world one is used for engine revolutions and the other for vehicle speed. In formal engineering nomenclature, more precise terms are used to distinguish the two.

https://en.wikipedia.org/wiki/Tachometer

Примеры употребления для Tachometer

1. "There‘s a red zone at the end of the tachometer that you aren‘t supposed to stay in for very long," he said.

2. If I‘m an elderly person, I probably want a very large speedometer so I can see it; if I‘m a race–car driver, maybe all I want is a tachometer." The close proximity of cars in cities increases the risk of accidents, and the MIT car has a host of radical ideas to deal with this problem.

3. The bus tachometer showed that the bus was traveling at just below 80 kilometers an hour when the accident occurred along the Maliakos Gulf part of the Athens–Thessaloniki highway, where seven teenage students where killed last September in a bus crash.

4. The hybrid could run about 25 miles on electric power alone if driving conditions were right (and if you didn‘t need to use the air conditioner). Watching the tachometer register zero revolutions per minute as the SUV noiselessly creeps along in 20 m.p.h. city traffic takes time to accept.