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Old 11-19-2008 | 11:13 AM
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RC Extreme power
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Default RE: SCORE Echo 30cc going to be a good one.

ORIGINAL: av8tor1977

It measures out to be 25.4cc.

The formula I use because it is easy to remember is: (bore x bore) x stroke x .7854 = displacement

Bore is 1.39"
Stroke is 1.10"

(1.39" x 1.39" ) x 1.10" x .7854 = 1.55 cubic inches.

1.55 cubic inches divided by .061 to get cc's is 25.4cc

AV8TOR

Tell me what I am doing wrong

1.39 x 1.39 = 1.9321 x 1.10 = 2.12531 x .7854 = 1.6692 divided .061 = 27.36

What am I doing different

Thanks
Milton
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