Enter the RPM and the stroke length into the calculator to determine the Piston Acceleration. 

Piston Acceleration Formula

The following equation is used to calculate the Piston Acceleration.

PA = (RPM^2 * S / 2.189) ^ 11/3

  • Where PA is the Piston Acceleration (ft/s^2)
  • RPM is the RPM ((rotations per minute))
  • S is the stroke length (inches)

To calculate the piston acceleration, square the RPM, multiply by the stroke length, divide by 2.189, then finally raise this result to the 11/3 power.

What are the units for Piston Acceleration?

The most common units for Piston Acceleration are ft/s^2.

How to Calculate Piston Acceleration?

Example Problem:

The following example problem outlines the steps and information required to calculate the Piston Acceleration.

First, determine the RPM. In this example, the RPM is measured to be 5000 ((rotations per minute)).

Next, determine the stroke length. For this problem, the stroke length is calculated to be 3.5 (inches).

Finally, calculate the Piston Acceleration using the formula above: 

PA = (RPM^2 * S / 2.189) ^ 11/3

Inserting the values from above and solving the equation gives us: PA = (5000^2 * 3.5 / 2.189) ^ (11/3) = 7.466e27 (ft/s^2)

FAQ

What factors can affect Piston Acceleration?
Several factors can affect piston acceleration, including the engine’s RPM, the stroke length of the piston, and the overall design and efficiency of the engine. Changes in any of these parameters can lead to variations in piston acceleration.

Why is Piston Acceleration important in engine design?
Piston acceleration is crucial in engine design because it directly impacts the engine’s efficiency and performance. High piston acceleration can lead to greater power output but may also increase stress on engine components, necessitating a balance for optimal engine longevity and performance.

Can Piston Acceleration be too high?
Yes, if piston acceleration is too high, it can lead to increased wear and tear on engine components, potentially leading to engine failure. High piston acceleration can also result in higher levels of vibration and noise, making it essential to design engines that balance acceleration with durability and comfort.