SRPS B.H8.144:2015

Standard Test Method for Supercharge Rating of Spark-Ignition Aviation Gasoline

Scope

This laboratory test method covers the quantitative determination of supercharge ratings of spark-ignition aviation gasoline. The sample fuel is tested using a standardized single cylinder, four-stroke cycle, indirect injected, liquid cooled, CFR engine run in accordance with a defined set of operating conditions. The supercharge rating is calculated by linear interpolation of the knock limited power of the sample compared to the knock limited power of bracketing reference fuel blends. The rating scale covers the range from 85 octane number to Isooctane + 6.0 mL TEL/U.S. gal. The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pound units. The standardized CFR engine measurements and reference fuel concentrations continue to be in historical units.