. Engineering practice and theory, for steam engineers ... . THE LIPPINCOTT PLANIMETER. AND THEORY. 69. THE WILLIS PLANIMETER. O TESTING GOVERNORS. The governor of a throttling engine and the cutoff mechanism of an automatic engine, should be setso that with the highest available steam pressure onthe boilers,and the lightest load on the engine, thespeed of the crank shaft will not be engines regulate so closely that the variationunder extreme conditions is less than 2 per cent,while in others it may amount to 5 per cent. Engines should be tested for this defect at shortintervals
. Engineering practice and theory, for steam engineers ... . THE LIPPINCOTT PLANIMETER. AND THEORY. 69. THE WILLIS PLANIMETER. O TESTING GOVERNORS. The governor of a throttling engine and the cutoff mechanism of an automatic engine, should be setso that with the highest available steam pressure onthe boilers,and the lightest load on the engine, thespeed of the crank shaft will not be engines regulate so closely that the variationunder extreme conditions is less than 2 per cent,while in others it may amount to 5 per cent. Engines should be tested for this defect at shortintervals in regular service, also whenever repairsor changes of any kind have been made. Thepractice of lengthening or shortening the rodswhich connect the governor to the cut off mechan-ism of a Corliss, or any similar engine, in order toincrease the speed, is dangerous, because the pointof cut off, when the balls are in their highest posi-tion, may be long enough to cause the engine torace, if all of the load is suddenly removed. JO ENGINEERING PRACTICE CHAPTER 10. MORE ABOUT HORSE POWER CONSTANTS. CALCU
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