post # 5:
Quote:
Originally Posted by Probie007 Hi I am a certified traffic accident investigator and reconstructionist. I suggest you perform a small test on your seat belt if you are having problems with them.
Sit in the car grab the shoulder belt at about shoulder height and jerk on it... do this 5-6 times. It shoud lock each time you perform this test. If it doesn't lock then have it checked out by a qualified dealer or service tech. You need this to work to save your life. |
Probie007
just for edification -
for someone who is a "certified traffic accident investigator and reconstructionist" - i would take exception to your explanation of how to test seat belts -
- "yanking" on the belt, no matter how hard - will accomplish absolutely nothing!!!
it is done by a force called "
inertia"
- and newer vehicles also have what is called a "
Pretensioner" - which is also explained on the pages i have supplied the links to, with pictures even

- and really new vehicles, the last 2 to 3 years, also have some other integrated features
All About Seat Belts / The Wonder of Seat Belts
http://www.takata.com/en/around/seatbelt03.html Quote:
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When the brakes are applied sharply or when the car is impacting something, the vehicle may be stopped, but due to inertia, the passengers motion will keep moving forward. Seat belts can help restrain that motion. Inside, the retractor has a silver-colored bead that is slightly larger than a ball bearing. The movement of the ball due to the vehicle deceleration that is occurring (either brake application or vehicle impact), results in an actuator moving up to lock the spool rotation, locking of the seat belts...
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How Seat Belts Work
http://www.takata.com/en/around/seatbelt01.html
this also is informative:
Precrash system
http://en.wikipedia.org/wiki/Precrash_system
whole lot more information here:
Category:Automotive safety technologies
http://en.wikipedia.org/wiki/Categor...y_technologies
and while i'm on the subject, a question,
have any of you seen what happens to the human body when you are involved in a frontal collision and are "lying-down-driving" [the back-rest laid back so far one can hardly see over the dash-board]
OR
someone with their feet on the dashboard and involved in a frontal collision???
- same consequences
sure isn't pretty - might be something to think about....