In-Line Aircraft-Engine Bearing Loads. 1 - Crankpin-Bearing Loads
AIRCRAFT ENGINE RESEARCH LAB CLEVELAND OH
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A method of generalizing the results of a relatively few conventional bearing-load analyses has been developed. When dimensional analysis is applied, a smooth curve is obtained when the quantity rpmsqimep is plotted against bearing load at a particular crank angleimep. Such a family of curves, using crank angle as the parameter, may be obtained from the results of as few as six conventional bearing-load analyses. This family of curves enables charts to be constructed that give the maximum and mean crankpin-bearing loads for any combination of engine speed and indicated mean effective pressure. This method is applicable to the principal bearings of both in-line and radial engines.
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