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Calculate Required CFM Of Aircraft Carburetor

This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to give the aircraft's engine air intake volume requirements for a normally aspirated engine. Enter the engine displacement size in cubic inches. Select the anticipated operating conditions. Enter the anticipated maximum safe engine RPMs for the selected conditions. Enter the volumetric efficiency of the engine. (Most aviation engines are a compromise between economy, efficiency, reliability and performance; about 80% at factory suggested tuning specifications. Engines that have been tuned for improved performance may have up to 95%. Longevity is usually compromised.) Click on Calculate. The value will be returned in Cubic Feet Per Minute required in a range of From and To. To do another, click the Clear Values button and then enter a new value. Calculated accuracy of current Javascript enabled browsers is generally 16 places.

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Required Data Entry
Engine Displacement (CID only) Cubic Inches
Target Conditions
Volumetric Efficiency At Target RPM %
Target RPM Engine RPM
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Calculated Results
Required CFM From To CFM
Updated 6.01.11

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