Jerry Eichenberger
Serious Thumper
   
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2006 S40. OEM windshield, saddle bags, Sportster
Posts: 2919
Columbus, Ohio
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The whole science of crashworthiness is fairly new.
In the past, we put so much emphasis only on avoiding crashes, and of course, that will always be a worthy pursuit - avoidance.
But finally both the law, and the engineers came to recognize that vehicles could be better designed and built to protect occupants in the inevitable accident.
This effort really began in WW II, when Republic Aircraft designed the P-47 Thunderbolt and with its cockpit capable of protecting the pilot from split second 40G forces during impacts.
The next step in protection is known in the aviation industry, and has been since WW II. But it probably will never get into cars due to resistance from common folks.
That's the 5 point restraint system - a belt coming across each hip, meeting a belt coming down across each shoulder, and a crotch strap coming up from the seat, all meeting at a common buckle about where your belly button is.
The biggest deficit with what we have now in cars is called "submarining", where the driver slides forward, out of and under the seatbelt, and slams into the footwell and underside of the dash, as there is nothing to prevent this forward movement in an accident with forward energy. A 5 point system prevents this with its crotch strap.
A 5 point system offers about as much protection over just a lap belt with single diagonal shoulder belt (what's in most cars now), as that lap belt and single harness did compared to nothing at all.
But for some reason, consumers rebel at the thought of the 5 point system. If we could get it adopted, thousands of additional lives could be saved each year.
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