A Manual of the Principles And Practice of Road Making Comprising the Location
A Manual of the Principles And Practice of Road Making Comprising the Location
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The third, or residual resistance, is probably due to the unavoidable Concussions, oscillations, flexures, im- bedding of wheels in rail, friction of air against sides, &c. It may be hereafter decomposed into various elements, but is now taken as proportional to the weight of the train and the velocity, and as being equal to ^ lb. For each ton of train, at one mile per hour. * The tons here used are all gross tons of 2240 Ibs. 266 RAIL-ROADS. We are now prepared to find the resistance (in Ibs. ...) of a straight and level railroad to the motion of a train of cars, whose weight (in tons), velocity (in miles per hour), and frontage (in square feet), are given, by the following RULE. 1. Multiply the weight by 6, for friction. 2. Multiply the weight by the velocity, and divide by 3, for concussion. 3. Square the velocity, and multiply this square by the frontage, and divide this product by 400, for the at- mosphere. 4. Add these three results, and the sum is the total resistance. Divide this by the weight, and the quotient is the resistance per ton.
What to read after A Manual of the Principles And Practice of Road Making Comprising the Location?
You can find similar books in the "Read Also" column, or choose other free books by W M William Mitchell Gillespie to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The third, or residual resistance, is probably due to the unavoidable Concussions, oscillations, flexures, im- bedding of wheels in rail, friction of air against sides, &c. It may be hereafter decomposed into various elements, but is now taken as proportional to the weight of the train and the velocity, and as being equal to ^ lb. For each ton of train, at one mile per hour. * The tons here used are all gross tons of 2240 Ibs. 266 RAIL-ROADS. We are now prepared to find the resistance (in Ibs. ...) of a straight and level railroad to the motion of a train of cars, whose weight (in tons), velocity (in miles per hour), and frontage (in square feet), are given, by the following RULE. 1. Multiply the weight by 6, for friction. 2. Multiply the weight by the velocity, and divide by 3, for concussion. 3. Square the velocity, and multiply this square by the frontage, and divide this product by 400, for the at- mosphere. 4. Add these three results, and the sum is the total resistance. Divide this by the weight, and the quotient is the resistance per ton.
What to read after A Manual of the Principles And Practice of Road Making Comprising the Location?
You can find similar books in the "Read Also" column, or choose other free books by W M William Mitchell Gillespie to read onlineMoreLess
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