The Gas Engine and Principle and Practice: Including Comparison of the Two-cycle and Four-cycle Types of Internal Combustion Engines

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Gas power pulishing Company, 1907 - Internal combustion engines - 195 pages
 

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Page 113 - Fig. 37 represents the No. 3 planimeter, which differs somewhat in design from the two previously described. It is capable of measuring larger areas, and by means of the adjustable arm A giving the results in various denominations of value, such as square decimeters, square feet and square inches ; also of giving the average height of an indicator diagram in fortieths of an inch, which makes it a very useful instrument in connection with indicator work. DIRECTIONS FOR MEASURING AN INDICATOR DIAGRAM...
Page 103 - A the area of the piston in square inches; and N the number of revolutions of the engine crank shaft per minute.
Page 18 - It is the amount of heat energy necessary to raise the temperature of one pound of water one degree Fahrenheit at sea level.
Page 113 - Planimeter Care should be taken to have a flat, even, unglazed surface for the roller wheel to travel upon. A sheet of dull finished cardboard serves the purpose very well. Set the weight in position on the pivot end of the bar P, and after placing the instrument and the diagram in about the position shown in the cut (Fig.
Page 114 - Divide this by the length of the diagram, which we will call 3 inches, and we have .8266 inch as the average height of the diagram. Multiply this by the scale of the spring used in taking the diagram, which in this case is 40, and we have 33.06 pounds as the mean effective pressure per square inch on the piston of the engine. DIRECTIONS FOR USING THE No.
Page 113 - FIG. 370. point, moving it in the direction indicated by the arrow, or that of the hands of a watch, until it returns to the point of beginning. The result may then be read as follows : Suppose we find that the largest figure on the roller wheel D that has passed by zero on the vernier £ to be 2 (units...
Page 113 - F, and adjust the roller wheel to zero. Now follow the outline of the diagram carefully with the tracer point, moving it in the direction indicated by the arrow, or that of the hands of a watch, until it returns to the point of beginning. The result may then be read as follows: Suppose we find that the largest figure on the roller wheel D, that has passed by zero on the vernier...
Page 20 - ... the curve. 8. Thermal Efficiency. — The thermal efficiency of an engine is the ratio of the work done by the engine to the heat supplied to it. According to Watt's observations, confirmed later by...
Page 128 - The deposit of carbon frequently found where crude oil is used does not enter the cylinder or come in contact with the piston or piston rings, but is formed in the vaporizer cap. A flange cover at the back of the cap (not shown in this illustration) allows the quick removal of this deposit periodically, usually about every 60 hours.

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