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PI * W * (2 * D - L) * (L - D)
Sometimes 3 is used instead of PI, and may actually be closer due to mechanical efficiency.
Formula is the same for CID as it is for cm3 (CC's), just a matter if you use inches or centimeters for L, D and W.
W = Height of gear (how thick the gear is).
D = Diameter of gear.
L = Length from edge of one gear to the edge of the other across both gears.
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∙ 10y ago
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