Arizona republican., 1914-10-26

Has DeeH on the tongues ana ln the minds of every one who ever heard of an automobile, even though they never owned an auto cap or an auto veil; whether it be man with d $6,000 90 kilowatt Chinese Italian racer, holding all speed records of travelling through space without leaving the ground, or whether it was man who at heart knows lie will probably never be able to own even secondhand Ford roadster.
 The 1915 Cadillac eight cylinder is not a radical change from the proven design of the Cadillac, because the best features of the old models haze been maintained and mere inn provement has been made in the en- tire ear, although the only one We think of is the motor, owing to the number of cylinders put to use which we are not yet acquainted with.
 Every one will remember what tremendous volume of ink was six cylinder engine was first nois ed amongst us, even the advancement to the four cylinder from the three and the three from the two, etc, and in those days we were all astonished you may wonder! now that We are going to have eight cylinder mo- tors in quantities will the next ad- vancement be ten or twelve cylin- der? It's likely to if the mechani- cal engineers and producers of same can convince us of it's advantages over the types we already have Just as in the old days, and even at the present time, one always de scribed the excellence of the six cylinder engine by comparing it with the four cylinder, so we will now dis cuss the eight in terms of the six, over which it has several very pro- nounced advantages.
 l. Size. In length, which is the only dimension that matters, within reasonable limits, on a motor car, the eight cylinder is preferable to the six, by matter of 30 per cent. The space available for bodywork upon the chassis is, therefore, much great
 
 enormous importance. But of even more value still are the advantages which follow on the use of a short engine The crankshaft has all of it's throws in one plane, and is therefore cheaper to manufacture than the crankshaft of a six cylin- der engine, the throws of which lie in r1la at an angle of 120 degrees to the oth- CTS. Again. the crankshaft being shorter possesses less torsional elas- ticity; therefore periodic vibration, which is so bad "a characteristic of six cylinder engines unless special preventive measures are taken, is greatly reduced. In like manner the camshaft is shorter, and periodic vibrations arising from this source are also reduced No great length of inlet piping is required, as is the case with the six, as the four " form cylinders lend themselves very readily to a piping arrangement which gives each cylinder practi cally an equal chance of getting a full charge of gas-that is to say, no cylinders are likely to be starved. ? Weight Power for power. nd allowing equal strength of material. the eight cylinder is lighter than the six, owing to the shorter crank case, lighter crankshaft, lighter flywheei shorter camshaft and lighter recpro : eating parts (the cylinders being smaller). and this again is a great advantage
 3. Torque. The eight cylinder has 8 1-3 per cent better torque than the six, as previously de- scribed
 | A. Balance. Theoretically, both engines are equal in this respect that is to say, both are perfect. But periodic crankshaft vibration is far more likely to occur in the six than in the eight cylinder In the former it can only be prevented by special balancing devices, or by the use of a crankshaft of great strength and stiffness
 ,. Cooling. The eight cylinder !; preferable to the six, as each row oi cylinders can be treated as a sepa- rate unit and if the valve chambers face one another it will be seen tha, the water circulation has no ten dency to form pockets" around tho valves. Each engine unit bein1 smaller, a thermo -syphon system oi circulation can be used without r.a- quiring the radiator to be placed very high above the engine. In othel words, if the inclination of the watel outlet from the head of the cylinders
 is to be the same in each case, tht six cylinder engine requires the radi- ator more than half as high agair above as in the eight, for in the Y
 type the water jackets also occcupl
 a lower position.
 In brief, the great advantages O.
 the eight cylinder engine are it.
 small size, light weight, excellen
 torque, perfect balance and good car. , buretion, in all of which points i
 is equalled by no other type of en
 zine at present applied to motor ca
 propulsion.
 The sweetest running car in tn,
 world. This is the verdict of thos who have experienced the super luxury of the Cadillac eight. Tn, old Cadillac saying, Just get in an'