1946-01-01

Development of REFERENCE FUEL SCALES for KNOCK RATING - Report of Coordinating Fuel Research Committee of Coordinating Research Council, Inc. 460230

PRACTICALLY all of the development of the art of knock rating has occurred during the past 25 years. The octane-number scale, an outstanding development 15 years ago, was fairly satisfactory until fuels rating above iso-octane became available.
Several means of extending this scale have gained limited acceptance, but experimental fuels have now exceeded the range of these systems.
A CFR group working on the problem has proposed a “triptane number” scale and an interchangeable detonation index, both extensible to the upper limit of antiknock quality.
Research now in progress may be expected to provide information on which adoption of this scale can be based.

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