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- A flexible drive cable inside a flexible tube links a small magnet inside the speedometer to the gearbox output shaft. The magnet rotates with the shaft and its magnetic field attracts a metal drum to turn the speedometer needle against the force of a hair spring.
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How does a speedometer work?
The magnet rotates inside a hollow metal cup, known as the speed cup, which is also free to rotate, though restrained by a fine coil of wire known as a hairspring. However, the magnet and the speed cup are not connected together: they're separated by air. The speed cup is attached to the pointer that moves up and down the speedometer dial.

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How do mechanical speedometers measure the speed of a car?
Mechanical speedometers measure the speed of a car by being linked mechanically with the gearbox output shaft . Since this shaft lies 'downstream' of the gear box, the speed with which it rotates is independent of gear changes and so gives a true measure of the road speed. Gearbox output shaft.

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Does a car have a speedometer?
In common with other developments in car technology, the trend is now towards using electronics in speedometers. But most cars - even ones being built today - have a mechanical speedometer, usually with a needle and calibrated dial to show the speed. The design of this type of speedometer has hardly changed in the last 50 years.

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What is a speedometer / speed meter?
A speedometer or speed meter is a gauge that measures and displays the instantaneous speed of a vehicle. Now universally fitted to motor vehicles, they started to be available as options in the early 20th century, and as standard equipment from about 1910 onwards.

Speedometer - Wikipedia

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How does an analog speedometer work?
Analog speedometers use a needle to point to a specific speed, which the driver reads as a number printed on a dial. The first speedometers were expensive and available only as options. It wasn't until 1910 that automobile manufacturers began to include the speedometer as standard equipment.

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Can a speedometer tell you your actual speed?
Only a speedometer can tell you your actual speed at any given moment. What we're talking about here is average speed; what you need to know as a motorist is your instantaneous speed: the speed you're going at any given moment. Figuring that out is a lot harder than you think.

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www.explainthatstuff.com › how-speedometer-worksHow do speedometers work? - Explain that Stuff

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Mar 23, 2023 · How does it all work? As the speedometer cable rotates, it turns the magnet at the same speed. The spinning magnet creates a fluctuating magnetic field inside the speed cup and, by the laws of electromagnetism, that means electric currents flow inside the cup as well.
www.howacarworks.com › accessories › how-a-speedo-worksHow a speedometer works - How a Car Works

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Since the speedometer measures the rotation of the gearbox output shaft, it is a relatively simple matter to use this information to work out how far the car has travelled. This is why the milometer (often called an odometer) is built into the speedometer.
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auto.howstuffworks.com › speedometerHow Speedometers Work | HowStuffWorks

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Apr 29, 2023 · The job of the speedometer is to indicate the speed of your car in miles per hour, kilometers per hour or both. Analog speedometers use a needle to point to a specific speed, which the driver reads as a number printed on a dial.
www.mechanicscout.com › how-does-a-speedometer-workHow Does A Speedometer Work? (A Detailed Explanation)

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The speedometer is built to move in a fluid motion while your car accelerates or decelerates. If there is a problem with the speedometer, it could begin to move erratically or waver. Most of the time, this is caused by a defective speedometer sensor or cable that's releasing inconsistent data.
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en.wikipedia.org › wiki › SpeedometerSpeedometer - Wikipedia

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A speedometer or speed meter is a gauge that measures and displays the instantaneous speed of a vehicle. Now universally fitted to motor vehicles, they started to be available as options in the early 20th century, and as standard equipment from about 1910 onwards. [1]
www.youtube.com › watchHow Speedometers Work: Mechanical vs. Electronic - YouTube

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Oct 9, 2016 · In this episode of Proctor Car Tips, Charles discusses the two types of speedometers, Mechanical vs Electronic. He also talks about the two main types of spe...
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- Author: The Proctor Dealerships
www.youtube.com › watchHow Does a Speedometer Works? (3D Animation) - YouTube

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How Does a Speedometer Works? (3D Animation)Eddy Type Speedometer or Mechanical Speedometer.An eddy current speedometer operates on the fascinating interplay...
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- Author: 3D Requiem