Small engine displacement calculations
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Small Engine Displacement Calculations. Stacey Beacham. Revised May 2007. Bottom Dead Center. Cylinder Head. 3.375” Stroke. 3.25”. Bore. Top Dead Center. Cylinder Head. Combustion Chamber. Formula For A Successful Calculation. Cylinder Displacement= ∏xBore 2 x stroke. 4. 3.375”

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Small Engine Displacement Calculations

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Small Engine Displacement Calculations

Stacey Beacham

Revised May 2007


Bottom Dead Center

Cylinder Head

3.375”

Stroke

3.25”

Bore


Top Dead Center

Cylinder Head

Combustion Chamber


Formula For A Successful Calculation

Cylinder Displacement= ∏xBore2 x stroke

4

3.375”

Stroke

3.25”

Bore


Formula For A Successful Calculation

Example:

Cylinder Displacement= 3.14 x 3.252 x 3.375

4

3.375”

Stroke

3.25”

Bore


Formula For A Successful Calculation

Example:

Cylinder Displacement (in3)= 3.14 x 3.252 x 3.375

4

3.14 x 10.5625x 3.375

=

4

3.375”

Stroke

3.25”

Bore

111.93609

=

4


Formula For A Successful Calculation

Example:

Cylinder Displacement (in3)=

27.984

or

28 cubic inches

28 in3


Questions To See If You Learned It

  • Calculate the displacement of an engine with a bore of 8 inches and stroke of 7.375

  • What would be the displacement of an engine with 6 cylinders with the same bore and stroke mentioned above?

  • How much displacement per cylinder would a John Deere 4020 have if it has a 404 in3 engine?


Questions To See If You Learned It

  • If a grain bin is 30’ in diameter and 80’ tall, how many cubic feet would be in the grain bin?

  • If a bushel of grain occupies 1.25ft3, how many bushels would the above mentioned grain bin hold, if it was filled level to the top?


Algebra and Ag

28in3 = 3.14 x Bin2 x 3.375 in

4

4

x

28in3 = 3.14 x Bin2 x 3.375 in

112in= B2

10.5975

10.56853= B2

10.56853= B


ANSWER

3.25 in


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