Rotating Torque Measurements - Rotary Shaft Torque Measurement


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Rotating Torque
Measurements

  Weight
  Kgs to lbs
  lbs to Kgs
  Stones to lbs

  Speed
  mph to kph, km/h
  kph, km/h to mph

  Temperature
  deg C to Fahrenheit
  Fahrenheit to Deg C

  Power
  Horsepower to Kw
  Power Weight Ratio
  Error Formula

Automotive engine torque is a measure of the force required to rotate an object about an axis, e.g. the force provided by the engine to rotate the drive train.
Due to frictional and mechanical losses in various drivetrain components, the measured rotational torque at the driven wheels will be approximately 20% less than the torque measured at the engine crankshaft.
The equation for rotating torque measurements for a force applied at right angles to the axis is as below: 

Torque = Distance * Force
         
Where Distance is the distance from the axis of rotation.

For example, a motor mechanic exerts a force of 4N at right angles to a wheel wrench the is 0.25 meters in length. The resulting Torque will therefore be 1.0 Nm.

Automobile engines produce torque over a range of rotational speeds. The engine under test rotational speed determines the amount of rotational torque.
The more powerful an engine is, the greater the amount of torque that can be generated.

A chassis dynamometer, is a piece of kit used to measure engine torque and rotational speed. This enables engine horsepower to be calculated. typically a chassis dynamometer comprises a pair of flat bed rollers over which the test vehicle wheels are positioned. The test vehicle wheels are then rotated to drive the dynamometer rollers.
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