Question
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Calculate the indicated horsepower of the following engine:
7 cylinders,
a stroke length of 0.85 feet,
a bore of 4.3 inches,
operating at 3240 rpm ,
and has an indicated mean effective pressure (IMEP) of 1310 psi per cylinder.
Round to 1 decimal place.

Ask by Guzman Ramirez. in Canada
Dec 09,2024

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Answer

The indicated horsepower of the engine is approximately 3.4 horsepower.

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Extra Insights

To calculate the indicated horsepower (IHP) of the engine, we can use the formula:
First, let’s calculate the displacement for one cylinder.
  1. Convert bore from inches to feet:
  2. The volume of one cylinder (V) can be calculated using the formula for the volume of a cylinder:
  3. Now, compute the total displacement for 7 cylinders:
Now we can calculate the IHP:
  • Convert IMEP from psi to pounds per square foot:
Now plug everything into the IHP formula:
Therefore, the indicated horsepower of the engine is approximately 338.2 HP.

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