The Daily Banner, Greencastle, Putnam County, 26 April 1967 — Page 7

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W*dn«sday, April 26, 1967

Th« Daily Banner, Greeneastle, Indiana

Page 7

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Auto Industry Building Safer Cars, But Death Still Stalks Highways

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By DAVID W. CHUTE DETROIT UPI — This is a Stop-Look-Listen report for any motorist who believes the automobile industry and federal safety standards will produce a car safe against death or serious injury under any circum■tances. Nothing could be farther from the truth. Instant safety is not possible. Sudden death still is.

Cars built according to government safety standards will be safer. And future standards probably will make them safer still. But only to a point All the government standards so far imposed are based on energy forces released when a car hits a barrier at 30 miles an hour. Thirty miles an hour. All the standards so far a-

dopted — and those scheduled for future adoption — are designed to let you survive if your car hits a solid object at 30 miles an hour. No more. General Assumption The assumption generally accepted, at least up to now, is that above 30 miles an hour, a barrier crash will result in death anyway in spite of the precautions. All these reasons fall into

the general area of energy absorption and the practical limits available to provide for the car, instead of the person or persons in it, having to absorb all that energy. When a car hits a barrier at 30 miles an hour, it actually does not stop instantly. It decelerates from 30 miles an hour to zero in a time measured in milliseconds, and in a distance of about 26 inches.

A few milliseconds in time and 26 inches in distance don’t sound like much. But they’re extremely important. It is possible to build safety into a car to protect you when energy can be absorbed over a period of time and distance that small. But above 30 miles an hour, things begin to happeii. First, it’s a law of physics that when velocity is doubled, the amount of energy being built up for re-

lease in a sudden stop is not doubled. It’s quadrupled. Put another way, energy increases by the square of the velocity. This happens, of course, all the way from zero. But up to 30 miles an hour, cars can be built that can be equipped with the elements necessary to protect the occupants. Above that speed, it’s another matter. The energy forces built up at 30-plus MPH make the car It-

self unsafe. For example, it’s been shown by repeated experiments that in a 30-mile an hour barrier crash, the damage is basically confined to the front end. But in a crash of, say, 43 miles an hour, the enormously increased energy forces deform the passenger compartment. Seat belt anchorages can be tom loose, so that even if you’re wearing a seat belt, your body will hurl forward.

It cannot be argued, of course, that any crash over 30 miles an hour will result in death. There are too many kinds of accidents, and many persons are walking around who have had accidents while traveling at higher speeds. But they were not barrier crashes. Don’t try hitting a tree, for example, at more than 30. It could be curtains.

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