Transactions of the International Engineering Congress, 1915 Volume 6
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 edition. Excerpt: ...that with reduced weight of higher speed and at least two cylinders with minimum frame and flywheels, and finally that which is distinctly of automobile type, high speed and four cylinder. These tractors are now built in sizes from about ten to nearly one hundred horsepower, and the tendency is to reduce size to reach the maximum number of small farmers. Tractors are all low speed machines, two to three miles per hour, so that much gearing down is essential, especially as tractor wheels are often as large as nine feet in diameter. The second new industry is that of the internal combustion locomotives which is a logical development of the last type of tractor as it is also a low, though higher speed machine for hauling, but now on rails. The standard engine at present is a four cylinder vertical engine of moderate speed, being more marine than automobile in class, geared to driving wheels to give locomotive speeds ranging from four to ten miles per hour, and weights from three to about twenty tons, the larger size having engine cylinders about 9" x 16." The third new industry of the group is that of self contained railroad car built now in a wide range of sizes, and car speeds up to and exceeding a mile a minute and using the four cylinder or eight cylinder "V" automobile type engine from 50 h.p. to 300 h.p. per car. The two leading styles differ radically in drive, one having direct gear drive with variable engine speed, and the other operating electric generators at constant speed with electric motors on the trucks, electrically controlled for speed and torque. In this class of service engine weights must be low, contrary to the tractor and locomotive requirements, and the electric drive 250 h.p. engine, probably the...
- 189 x 246 x 8mm | 290g
- 13 Sep 2013
- United States
- black & white illustrations