. Automotive industries . with the largest automotive manufacturers in this coun-try, are seeking means whereby higher compressionratios can be employed. Kettering is responsible for thestatement that if the compression pressure of the con-ventional engine of to-day could be raised to from 120to 140 lb. per sq. in. the efficiency would be states that in a one-hour run of a Liberty air-craft engine with a compression ratio of to 1, usingordinary automobile gasoline instead of high test gaso-line at wide open throttle, most of the piston heads werecracked due to detonation wh
. Automotive industries . with the largest automotive manufacturers in this coun-try, are seeking means whereby higher compressionratios can be employed. Kettering is responsible for thestatement that if the compression pressure of the con-ventional engine of to-day could be raised to from 120to 140 lb. per sq. in. the efficiency would be states that in a one-hour run of a Liberty air-craft engine with a compression ratio of to 1, usingordinary automobile gasoline instead of high test gaso-line at wide open throttle, most of the piston heads werecracked due to detonation while every spark plug wasinjured. This shows clearly the effect of using withhigh compression pressures the average fuel now avail-able, unless some means is taken for controlling detona-tion. This subject will be referred to later, but is men-tioned here to illustrate the important bearing whichthe quality of fuel has in respect to controlling fuel econ-omy. Tests made by Nelson show clearly the effect ofhigher compressio
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
