Indianapolis Times, Volume 40, Number 226, Indianapolis, Marion County, 8 February 1929 — Page 23

FEB. 8, 1929.

MOTOR SPEED DEMON FACES DEATHTRAPS Slight Variation, Speeding at 240 Miles an Hour, Would Kill Segrave. /ii/ Times Special WASHINGTON, Feb. B.—Major H. O. D. Segrave of England will have a score of knotty problems confronting him on the sands of Daytona beach when he attempts to set anew world’s record in March with his Golden Arrow. Not the least of these will be his problem of keeping the car on a course, for a slight vari-

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ation which would mean nothing in a pleasure car traveling at sixty miles an hour might spell ruin to him. The world record attempt will be made under sanction of the American Automobile Association, the governing body of speed tests in this country, and of the city of Daytona Beach. While thes6 two agencies will make every attempt to have the course in perfect condition, they can not influence the driving of the car. It will be up to Major Segrave to keep it in a straight bourse. At 240 miles an hour the car is traveling 352 feet a second. Suppose the car should deviate only three degrees from a straight course while speeding along at its maximum speed. In one second it would be 18.442 feet off the course. If it were to veer ten degrees, it would-be 61.42 feet off the course in one second. On the one side as the car hurtles down the beach is the

soft sand of the shore side, on the other the ocean. Further than that, a car speeding along at upward of 200 miles an hour cannot be brought back into a straight course at once. The pilot may turn his steering wheel to correct the devieiion, but so great is the forward momentum that response is not instantaneous. Streamlining is another matter that the major had to consider. At first thought the average person might say that perfect streamlining would be be the means of reducing the wind pressure to u minimum. This latter might be t.ne, but with perfect streamlining there would be a tendency for the car to lift from the ground and to become unstable from other angles. It gejaerally is recognized that a perfect streamline is a body of modified cigar shape. In the air this design if it could be obtained, would be perfect. But a speeding automobile must be kept on the ground. The design must be such that there is sufficient pressure downward to k s -v the front of the car

THE INDIANAPOLIS TIMES

1 from rising. There must also be sufficient downward pressure on the rear wheels so that they will get traction. So the problem of design is one that will merge most closely all the don't and do’s in construction into a car body that will offer a minimum of wind resistance, but also will be built so it will stay where it belongs, on the ground, and not rise at times into the air due to wind pressure on some of its sections. An expert has figured that at 240 miles an hour, with a frontal area of twelve square feet, there will be wind pressure of 746.49 pounds to the square foot. To overcome this tremendous pressure there is a motor of 1,461.12 cubic inches, capable of developing 900 horsepower at . 3,400 revolutions a minute. Builds Radio in Clock LONDON, Feb. B.—Hugh Lawley, an Oxford man, has, patented a radio set, of four tubes, that he has built into a miniature grandfather clock.

FIX TRAP FOR BANDITS Scotland Yard Prepares Cage for Catching Robber Cars. LONDON, Feb. B.—Scotland Yard is considering the adoption of a novel trap for bandits ir motor cars. The device consists of a mat of steel tentacles and wire chains, placed across the road. When the bandit car crosses the mat the wires and chains grip the chassis and entangle it in such a manner that a fast-moving car is stopped in less than one' hundred yards. Pupils in Scotland have to get through about three times as many books in the school year as London schoolchildren.

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