This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...have to use gears to get a sufficient variety of speeds at full power. Then, too, a steam locomotive will run either way by simply shifting the slide valve, while the gasolene automobile has to use a reversing gear. Finally a gas engine is not always free from noise and smell. 229. Advantages of the gas engine. On ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...have to use gears to get a sufficient variety of speeds at full power. Then, too, a steam locomotive will run either way by simply shifting the slide valve, while the gasolene automobile has to use a reversing gear. Finally a gas engine is not always free from noise and smell. 229. Advantages of the gas engine. On account of lightness and compactness, and the small space occupied by the fuel, there has been a phenomenal development in the manufacture of gasolene engines for small pumping stations, shops, and factories, as well as for automobiles, launches, and aeroplanes. The gas engine does not require any stoking of a boiler or constant care to keep up the right pressure of steam. In fact, once started it requires very little attention. It can be started at a moment's notice, while if a steam engine and its boiler have been "shut down," it takes a good while to get up steam. Furthermore, no fuel is wasted when a gas engine is shut down at night or between periods of use. In efficiency the modern gas engine ranks much higher than the steam engine. 230. Balance sheet of heat engines. When an engine is tested, a heat balance sheet is usually made up. This is somewhat like a cash account, in that it accounts for all the energy delivered to the engine by the fuel. These heat balance sheets vary somewhat for different engines even of good design, but the following are fairly typical for large and efficient engines of the two types: --231. Mechanical equivalent of heat. We have been considering the efficiency of engines without stopping to describe how it is measured. Evidently we must have some way of comparing the output, which would naturally be measured in foot pounds or kilogram meters, with the input, which would naturally be measured in B. t. u. ...
Read Less
Add this copy of Practical Physics for Secondary Schools: Fundamental to cart. $24.01, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Practical Physics for Secondary Schools: Fundamental to cart. $34.31, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Practical Physics for Secondary Schools: Fundamental to cart. $38.96, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of Practical Physics for Secondary Schools: Fundamental to cart. $48.63, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
