« PreviousContinue »
Auto's Engine Makes Great
HE old theory that auto mobiles are eccentric machines, irresponsible in their workings, subject to all manner of accidents,
and lacking, under hard usage, in wearing qualities has been finally and effectually exploded as the result of a recent test. This prejudice against belief in the permanent efficiency of a given automobile was in part justifiable, for until the last few years the auto vehicles turned out were far from satisfactory. A season's use and the machine went to the junk heap. The general public, and indeed the most enthu
siastic autoists, as a rule, do not realize the enormous strides that invention has made in the durability and efficiency of motor cars during the twentieth century. It was to call attention to the full possibilities of the modern standard motor vehicle that the trial test referred to was made.
Rather strangely enough, it was not a new machine that was employed for the purpose, but one that already had a run of over 40,000 miles to its credit. The owner had turned in the vehicle for the purpose of securing a more recent pattern and the makers were so well pleased with its condition that they de
termined to put its long-employed parts was arranged for in the comparatively to a further test of endurance. How short time of four days. In preparation long the motor of a car that had been few changes were made in the parts of driven over the worst sort of roads in all the car. Only new tires were fitted and weathers and in all temperatures, rang- storage batteries installed in place of the ing from one hundred degrees to zero, customary dry cell type. The spark coil would run without once stopping, was vibrators were also over-hauled to fit the problem.
them to the difference in the battery The results were truly remarkable. In force. That there might not be the one hundred and forty hours and thirty slightest doubt raised as to the result of six minutes, two thousand, two and one- the test a corps of disinterested observers half miles were made without the motors were selected who were with the car durbeing brought to a stop, though, of course, ing its entire run, and two experts were the car itself was not in motion all of this chosen to declare as to the condition of time. Such a run, while unusual, would the machinery at the end of the run. have no great significance were it not The experts named were Edward B. for the excellent condition the machine's Waite, A. S. M. E., Head of the Instrucparts, as a whole, were in at the end of tion Department of the American School the test. The trial was finally ended, not of Correspondence, and Technical Editor because of any break down, but because of TECHNICAL WORLD MAGAZINE, and the gasoline used was of such poor Professor Virgil Oldberg, M. E., of the quality as to close up the tube that fed Armour Institute of Technology. the carbureter.
The trial was made between the cities The machine employed in the test was of Milwaukee and Chicago, back and a small touring car of eighteen horse forth, till over two thousand miles had power that had been purchased in the been run, when the stoppage of the fall of 1904. In the spring of the follow- feeder occurred. Over two hundred ing year the car was resold and its new miles were covered after that, but these owner kept a careful record of the mile- were not counted. age, gasoline consumption, cost for re- . A general invitation had been issued pairs, etc. Up to the time the test was to automobile manufacturers, owners and made the machine, as already stated, had all other interested persons to witness the traveled over 40,000 miles.
dismanteling of the car. On the mornThe “non-stop” run, as it was called, ing of the twenty-eighth of February, a
few minutes after the run was finished, hours were spent in filling tanks, changthe experts began their inspection.
ing drivers, putting on new tires, etc. On The motor was first removed and ex- each gallon of oil consumed fourteen and amined. The rear cylinder showed nor- a half miles were made. Including the mal maximum compression, the front a lubricating' oil used the fuel cost was slight leakage, a fall of about five pounds $24.75. being noted. The condition of the rear The roads the machine traveled over piston and cylinder was perfect. The forward cylinder was somewhat scored, and the piston rings were worn, the last due apparently to an insufficient supply of oil at some past time in the cylinder. The inlet valves were in firstclass working order, although the stems were slightly worn. The stems of the exhaust valves, themselves pitted, showed considerable wear. Crank pins and connecting rod bearings were all that could be desired. The main bearings were in good condition, as were the
AFTER THE EXAMINATION BY EXPERTS HAD BEEN MADE. wrist pins and bearings. Nothing was wrong with valve were by no means boulevards. Part of cams or cam rollers, though the roller the time they were regular marshes. A pins, as evidenced by slight loss of mo- cold wind blowing speedily turned them tion, were somewhat.worn.
into frozen ridges and ruts. Often the In the gasoline tank and feed pipe to wheels broke through the ice, badly the carbureter a considerable deposit of shredding the tires. Still, in spite of gray sediment and some lint were found. this, the first tire trouble did not occur Had the tank and pipe been cleaned be- till the car had covered a distance of fore the non-stop run was made the 1,027 miles, when a rear tire exploded. motor in all likelihood would have con- The trial showed the truly remarkable tinued to operate indefinitely. .
endurance of the automobile of today, The total cost of putting the machine an endurance that is doubly remarkable in first-class condition, including cost of when the careful adjustment and delilabor, was estimated by a repair man at cate parts are considered in contrast with about twenty-five dollars.
the indifferent character of the roads in During the run slightly over fifteen this country.
coverable didin spitbadly
in the tota peratelihood "w was meaned bed
of each class these books make a strong REVIEWS of BOOKSL
appeal, for from them can be gained a working knowledge of principles and methods, with the authority of leading
experts. to rely upon. Among distinCyclopedia of Architecture, Carpentry and
guished contributors appear such names Building.
as James C. Plant, Superintendent of About forty of the leading authorities Computing Division, Office of Supervisof the United States have contributed to ing Architect, Treasury, Washington, the ten-volume set of truly extraordinary D. C., and Walter Loring Webb, Conbooks under the above title, which are sulting Engineer and Expert on Reinjust off the presses of the American forced Concrete. Each section is the School of Correspondence, Chicago. work of a leader of practice in his speFour thousand pages with approximately cialty. two hundred full-page and over three Uniform excellence characterizes the thousand lesser illustrations, elevations, work throughout, but some sections are photographs and drawings, the set con- marked with specially able handling and tains, with working drawings, detailed are of special value. Of these, sections estimates of various kinds of structures, on Steel Construction and on Concrete homes, bungalows, summer cottages and and Reinforced Concrete are noteworthy. artistic types of public buildings. Com- Along these lines, the new work is the prehensive and complete, it is a work of pioneer in compiling the results of operapractical reference, invaluable to the stu- tions carried on, and discovery made so dent and professional alike, in the build- recently that nothing of standard charing world, containing much that has acter has before been printed upon them, never before been brought together in and the information these sections alone useful form, with abundance of new ma- contain is worth more to the man who terial, the thought and experience of the aims to be up to date than the price of men who are doing things—big things— the entire set. Of the article on Conin this age of amazing constructive prog- tracts and Specifications, which includes ress. The application of new methods. a full discussion of the methods and the handling of the new materials and principles of government contracts and elements of modern construction, the work, so obscure to the ordinary indirecords of tests. the exact and reliable vidual, the same may be said. The subinformation along the lines of fresh inves- ject of Estimating and Building Law is tigation and experiment, have been treat- also among those which will be found of ed and compiled in a manner upon which remarkable value. the publishers are to be congratulated. Each section is supplemented with test The articles and comments are live, vital questions, a thing unique and of intreatises upon live subjects, written and estimable help to the student. Even in edited with rare and remarkable atten- the minor subjects, such as Handrailing, tion to a general need of simplicity of Plumbing, Electric Wiring, etc., they furhandling, so that the books are as well nish a guide to reading and study which adapted for the use of the beginner and makes mastery of the subject comparastudent or of the everyday man, who tively easy. And one further feature "wants to know," as they are fitted to which places these books in a class by fill the wants of the specialist.
themselves, is the privilege extended to Contractors, carpenters, masons and any owner, to supplement his own readpainters, members of every trade, must ing by enlisting the personal advice of each know something, nowadays, of the experts through the publishers. others' crafts. Owners and investors In appearance the volumes are handhave need of some technical knowledge.. some, well-bound in half-morocco, No general library is complete without printed in large, clear type and the illussome comprehensive and authoritative trations are admirably selected and work on the building arts. To the men choice, printed with excellent effect.