Piston Speed Calculator

The Piston Speed is the average or mean speed at which a piston moves and completes on full-cycle inside the engine. To calculate the Piston Speed as stated above, we need two values, Stroke Length and Revolution Per Minute.

The formula for calculating Piston Speed is the following: Piston Speed = 2 x (Stroke Length) x (Revolution Per Minute)

To better understand the meaning and application of the above-mentioned formula for calculating Piston Speed, one needs to understand the meaning of all the components that are important to calculate Piston Speed: Stroke Length and Revolution Per Minute (RPM).

What is meant by Stroke Length?

The Stroke Length is the whole distance the piston completes when it finishes one complete cycle inside the cylinder. The unit of the Stroke Length can be in any length unit like millimeters, centimeters, or inches. Therefore, for calculating the stroke length one needs to look at how much distance the piston traveled for completing one whole cycle.

For Example: If you are asked to calculate the piston speed for an engine with a given stroke of 3 mm and 100 RPM.In this example, you can understand easily that the Stroke Length is 3mm.

What is meant by RPM or Revolutions Per Minute?

The Revolutions Per Minute (RPM) is the number of revolutions a piston of an engine can take in one minute. It is very simple to determine the value of the RPM in a given instance.

For Example: If you are asked to calculate the piston speed for an engine with a given stroke length of 3mm and 100 RPM, you can easily consider 100 as the value of Revolutions Per Minute (RPM) to calculate the Piston Speed of the given engine.

How to Calculate the Piston Speed?

To calculate the Piston Speed, one should know all the steps and the correct sequence to carry out when they need to calculate Piston Speed. The procedure entails the following steps

• Find the value of the Stroke Length of the cylinder which contains the Piston.
• Find the value of the Revolution Per Minute of the Engine which contains the Piston.
• After correctly determining the values of the Stroke Length and the Revolution Per Minute, one needs to apply them to the following formula i.e. Piston Speed = 2 x (Stroke Length) x (Revolution Per Minute)

To better understand this formula, please read the following example carefully.

Example:

The piston stroke is measured to be 2 inches and the one complete cycle takes 500 RPM. Calculate the Piston Speed of the Engine.

Solution:

• Step 1: The value of the stroke length = 2 inches
• Step 2: The value of revolution per minute = 500 RPM
• Step 3: Apply these values into the formula:Piston Speed = 2 x (Stroke Length) x (RPM)= 2 x (2) x (500) = 2000 inches per minute

This means that the piston moves at the speed of 2000 inches per minute inside the engine.

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FAQs on Piston Speed Calculator

1. What is the method of calculation of Piston Speed?

To calculate the Piston Speed, all you need are the values of Stroke Length and RPM.Find these values and apply them to the formula:Piston Speed = 2 x (Stroke Length) x (RPM)

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2. What is the correct unit of Piston Speed?

There can be many different units of Piston Speed like Feet per Minute Inches per Minute or Meters per Second.

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3. How do you calculate the Piston Speed by hand?

To calculate the Piston Speed by hand, just refer to the formula for calculation of Piston Speed. Find the values of Stroke Length and Revolution Per Minute accurately and apply them to the formula.

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