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# Small Engine Displacement Calculations PowerPoint PPT Presentation

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”

Small Engine Displacement Calculations

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## Small Engine Displacement Calculations

Stacey Beacham

Revised May 2007

3.375”

Stroke

3.25”

Bore

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