Judge — October 14, 1922 — page 28: what you’re looking at

Machine-transcribed from the original scan — historical spelling and the odd misread are preserved.

| GET ‘Can Teil it Fi FfomufconODTe damreanpetnn {fal CORODITE diamonds) jorery way—aame blazing. "are oe, etand the di ‘agtaved ‘Beautiful mountings of most modern dea Gola or latest white platinum Coisn. Tiandnome art-leatber case free Cuticura Talcum| is Fragrant and Very Healthful Sample ry ct Cuticura Laboratories, Dept. falden, Mass. _25c. everywhere. WRITE for illustrated guide _ book ATENTS. and “RECORD OF INVENTION BLANK.” Send model or sketch and description of | invention for our free opinion of its patentable nature. thest References. Prompt Service. Reasonable Terms. vieror J. EVANS & CO., 813 Ninth, Washington, D. C. MOTOR DEPARTMENT—Conducted by H. W. Slauson, M.E. Subscribers desiring information about m writing to the Motor Department, Jvvor. Please remember that a two-cent stamp sho. routes, can obtain it by made for this servic at a chunk of iron From 10 to 20 per cent. may be consumed that those are the in overcoming the friction of the gears | cylinders of an engine which and bearings of the transmission and can develop eighty horse power. We may differential, and another 10 per cent look at a tremendous piece of horse flesh, 1 be lost in overcoming the rolling re- one hundred times as large, and say that — sistance of the tires. The use of so-called this will develop one horse power—and frictionless bearings and more efficient uy be wrong in both ca: lubricants has reduced this power loss at A horse power represents the the rear wheels, but it is still a factor work which will be accomplished by a which represents an actual waste of from {horse in ten or twelve hours. At times ten to twenty cents out of every dollar t himself so that he is develop- that we spend for fuel. , : three or four horse power, as The amount of power lost by the tires straining at the traces to start depends much upon the car owner. If a heavy load or to pull it up a hill. The he purchases cord tires, he will find that eighty horse power engine will only de- their rolling resistance is considerably day in and day out less than that of the old fabric type; if power of eighty horses under conditions he keeps them inflated to the pressure of load and speed which enable it to re- recommended by the manufacturers he will, in spite of the phys discomfort occasioned by the hard riding, find that his gasoline bill may be decreased by 6 or 8 per cent. If he lets the non-skid surface of his tires wear down smooth so that he must use chains, over slippery pavements, he will find a power which, in the case of a fairly heavy car, traveling at twenty miles per hour, may amount to nine or ten horse power; and it would not require a large number of hours of operation at this rate to absorb the cost of a new non-skid tire which would not need chains. volve at its most efficient number of revolutions per minute, which is probably obtained when the car is traveling about sixty miles per hour. Conse- quently, an eighty horse power engine, while it may develop that amount power, is usually called upon to ¢ about one-quarter as mucl its max mum. Scientifically a horse power represents an amount of energy which is capable of lifting 33,000 pounds one foot in one minute. The same power, through a different use of levers, pulleys or gea might lift one pound 33,000 feet in one minute; or lift one pound one foot in the one thirty-three thousandth part of a minute; but no matter what its form, we must have the three elements of Hoad, distance and time, which taken together give us the figure of 33,000 foot pounds per minute. D NERS have been striving for years to enable us to apply a greater proportion of the power developed by our automobile engines in the form of effec- | tive work at the rear wheels. The average gasoline engine requires an average of one pound, or slightly less, of fuel for one horse power developed for one hour. If we call this pound, one pint, we would find that an engine can develop eight horse power UT it is in hill climbing that we em- ploy power to its limit and require the maximum ability of the engine. To move a car along a smooth level r DO YOU KNOW What is a thermostat? need cut outs? ns will be found in the ne of the Motor Departments RS TIONS IN THE MOTOR DEPARTMENT 1. Why doce an under-inflated pneumatic tire become hotter than docs one which is pumped to ite full. pressure? he pneumatic tire is composed of successive rs of cord or fabric separated from each other by rubber. If the tire is not sufficiently inflated, iderable bending takes place with t wall: at their point of c et with the bending will tend to slide these diffe ay et each other and the friction thus caused will nerate heat. What is the ling’ of an airplane? to the maximum . [tis deteri ight of t altitudes the and consequently ta more.” : Furthermore, the power engine for one hour on a gallon of gasoline. But decreases | in rare mospheres, Therefore, F > power generated by the engine is | when a plane has reached the altitude where the all the power generated by the engine is ehen apis fed Ue sits bse Ube |not used to lift us over the ground; in at least one-quarter of it is usually wasted between the engine and the r by the e » no, higher and we say that it has reached its “celling. 26 ! ‘