Catechism of the Locomotive

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Railroad gazette, 1891 - Locomotives - 709 pages
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Page 2 - The dictionary said that inertia was a property of matter, by which matter tends, when at rest, to remain so, and, when in motion, to move on in a straight line.
Page 274 - Since the valve must move a distance equal to the outside lap before admission can take place, it is evident that the eccentric can no longer be at right angles to the crank at the beginning of the stroke, but must be ahead of the right-angle point by an amount equal to AOC. The angle AGO is known as the angular advance.
Page 546 - ... end for which it is introduced. As the chemical action between the fuel and the oxygen can only take place when the two are in intimate contact, the rapidity and completeness of combustion and intensity of heat will be increased by increasing the number of points of contact, or by reducing the size of the pieces of fuel. The ultimate conclusion to be drawn from this is that coal should be used as dust, or, still better, as gas, in order to...
Page 30 - It has been found from carefully-made experiments that the amount of heat which is required to raise the temperature of one...
Page 507 - ... air pressure may sometimes reduce slowly, owing to the steam pressure getting low, or from the stopping of the pump, or from a leakage in some of the pipes when one or more cars are detached for switching purposes, and that in consequence it has been found absolutely necessary to provide each...
Page 5 - A force of 10 dynes acts on a mass of 5 grams starting it from rest. How fast is the mass moving at the end of the first second? at the end of the second second ? third second ? eighth second? (2) A force of 12 dynes, acting 5 seconds, imparts to a certain mass a final velocity of 3 cm. per second. How great is the mass ? (3) A force of 200 dynes acting upon a mass of 50 gm. gives it a final velocity of 100 cm. per second. How many seconds does the force...
Page 566 - How can we determine the relative value of different kinds of fuel for use in locomotives ? Answer. This can only be determined satisfactorily by actual experiment. The chemical composition, excepting so far as it indicates the presence of deleterious substances, such as sulphur, ashes, clinkers, etc., affords but little assistance in determining the value of fuel. Nearly the same quantities of elements in different fuels may arrange themselves, before and during combustion, so as to produce very...
Page 3 - ... uniform (or constant) acceleration. When the body falls in air or any other medium, the phenomena are complicated by the resistance of the medium; but when it falls in a vacuum its velocity increases every second by the same constant amount. Thus if the body starts from rest, it will have a velocity of 32.2 feet per second at the end of the first second, 64.4 feet per second at the end of the second second, 96.6 feet per second at the end of the third second, and so on.
Page iv - Dictionary for the definition of the word " catechism/' they will find that it means " an elementary book .containing a summary of principles in any science or art, but appropriately in religion, reduced to the form of questions and answers, and sometimes with notes, explanations and reference to authorities," which is exactly what the present book is intended to be.
Page 538 - It must not, however, be hastily assumed that if the flame does not give out a bright light, therefore the combustion is not complete. As has already been stated, the light of the gas flame is due to the presence of burning particles of solid carbon, which is set free by the combustion of the hydrogen with which it is combined. After it is separated from the hydrogen it immediately assumes a solid form.

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