Norwich bulletin., 1915-04-29
DOINGS IN THE AUTO WORLD
Aluminium Alloy Makes Particularly Desirable Piston Fifth Indianapolis 5OO-mile Race-Virgnia Railway Company Meets Jtney Proposition European Watch ing Performances of American Cars.

While aluminium alloy pistons have for years been used in certain racing cars, they have heretofore been little
 used in pleasure car motors.
 The extreme lightness of aluminium alloy makes this metal particularly de- sirable in the making of piStonS, where the least weight possible is desired in order that vibration may be reduced to a minimum.
 The reduction in weight of recipro- eating parts is a problem to which au- tomobiles engineers have given a great
 deal of attention during the past few
 years.
 AS vibration is the agent most de-
 structive to gasoline motors the adop-
 tion of aluminium alloy pistons means
 a much extended period of usefulness
 for motors, aside from the greater sat-
 isfaction that a smooth running en-
 zine gives.
 Nor is lightness the only character
 itic that recommends the use of this metal in pistons. Being softer than
 the cylinder walls if it should happen
 that the oil level gets below the dan ger point.
 The idea of using aluminium alloy in
 part that is subjected to the enor-
 nous work that a piston is called upon
 to perform is likely to raise a few
 doubts in the lay mind as to the prac- ticability of such practice. Because of the lightness of the metal however, it Is possible to make the wall and head of the piston thicker and still keep the weight considerably under that of an iron piston.
 Troubles due to carbon deposits are practically eliminated with aluminium pistons. This is due to the fact this metal will take a very high polish and
 carbon cannot form on highly polished | surfaces.
 The Humane Society of Toronto, | Canada, has added motorcycle to it's | equipment. The two-wheeler is to be
 used to respond to hurry calls. In bit over month another | Indianapolis five hundred mile race, the | fifth of the series, will have passed | into history. Another legion of motor fans will have crowded Indianapolis to witness the making of another speed king. The chances of the respective entrants, together with the effect their victory will have on the trend of the
 automobile industry, are already topics of the day. Who. then, will win the next Indianapolis 500-mile race is the all-absorbing question. The skeptic who in the face of the sudden vogue of the jitney bus still | is throwing cold water on the en- luuSldSlH ol lAe JiI!iSy OuHAC! SoeS his last defenses fall before the fact that the very interests into whose rev. enue the humble jitney bus makes the biggest inroads accept the bus as an inevitable addition to our modern l transportation methods. Thus the Virginia Railway & Pow CT company, of Richmond, Va, | through it's general manager, c. B. Buchanan, instead of combating the | jitney craze, as some still persist in calling the new movement, ordered | 100 cars, the first IS of which were shipped April 12, and will be in the | jitney service of Richmond. The cars are standard in every way and
 each will carry four passengers in addition to the driver.
 Horace DeLisser, president and
 general manager of the motor com pany, who concluded the deal with the Virginia street car concern, says that