. Locomotive engineering : a practical journal of railway motive power and rolling stock . the Stroke, and are num-bered from o (the-forward center; to these points horizontal lines aredrawn, and represent the inertia of thereciprocating parts. That is, the hori-zontal distance from any point to thevertical center line represents the inertiaof the reciprocating parts when a radiusline represents the centrifugal force of alike unbalanced weight. In this case the to which they arc connected by •■■dotted lines. The cards are intended to the figure on one will rep-n en) tin- same ordinates
. Locomotive engineering : a practical journal of railway motive power and rolling stock . the Stroke, and are num-bered from o (the-forward center; to these points horizontal lines aredrawn, and represent the inertia of thereciprocating parts. That is, the hori-zontal distance from any point to thevertical center line represents the inertiaof the reciprocating parts when a radiusline represents the centrifugal force of alike unbalanced weight. In this case the to which they arc connected by •■■dotted lines. The cards are intended to the figure on one will rep-n en) tin- same ordinates on the other,[hi Up al scale to bi in the 1 arda is 100 poundl to the inch. In order tomil. tin- inertia and steam forcereadily comparable, the steam forces havebeen reduced to tractive force, and alsoto the same scale as the inertia forces. The tractive force has been determinedby multiplying the force on the crank-pin, due to the steam pressure on thepiston, by the vertical distance that thecrank-pin is above or below the centerof the axle, and dividing the product by. La uioffi - EngineeringACTION OF INEHTIA AND STEAM FORCES. radius line is V/t inches long, and as thecentrifugal force is 6,000 pounds, it isclear that the scale by which these linesare to be measured will be 4,000 poundsper inch. As the inertia force in the fourquarters has been assumed to be equal,only the first quarter will be measuredand marked. Beginning at point I, wefind its length to the horizontal line tocorrespond to pounds; point 2 line,4,000; point 3 line, ; point 4 At point 5 the engine is on thequarter and no inertia force exists. Referring to the indicator cards, it willbe seen that their ordinates are drawn tocorrespond with the points in the stroke the radius of the wheel; the quotient isthe tractive force. In making these cal-culations for the various points in thestroke, it must be kept in mind that thetotal steam pressure on the piston doesnot reach the crank-pi
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Keywords: ., bookcentury1800, bookdecade1890, bookidlocomotiveen, bookyear1892
