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Thread: Collision safe car

  1. #1 Collision safe car 
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    I think to construct or purchase a car which
    would be very safe in case of collisions.
    I imagine some type of "cockpit" which is made and surrounded of rubber or
    balloons from all the sides.It should be exceptionally safe in any kind of collisions, so
    driver would survive and will not be smashed,
    rolled over etc.
    As I know Formula 1 cars are relatively safe.
    At least drivers could usually survive collisions
    on very high speed and don't die until some fire starts.How their cockpits are made?
    If you have some link to companies which make such type of vehicles (for private use)
    or technical descriptions,please give it to me.


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  3. #2  
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    Can you afford a 100,000 dollar hand built car?


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  4. #3  
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    I don't answer about my financial situation.
    I think about relatively small one-seat vehicle.
    It should be propelled by scooter size motor.
    I'm interesting to know if it's possible to make
    some cabin which would allow driver to survive
    even in harshest collisions.
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  5. #4  
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    Look at NASCAR Design, A little pee shooter car as you describe would either be squased like a bug or bounced into oblivion even if you were to build a cage strong enough to survive the impact.
    Can't beat the laws of physics!
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  6. #5  
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    I don't know,Formula 1 cockpits also don't
    seems to be large,just one-seat, but drivers
    able to survive collisions at a speed up to 200 mph.I think of some cabin which is made of
    very strong material such as carbon fiber laminated titanium,and external layer which
    will be made from very good strike-absorbing material such as some air-containing synthetic material.
    Here is example of similar car that mean:
    http://en.wikipedia.org/wiki/Midget_car_racing
    I wasn't able to find exact description
    of NASCAR design and technical data.Could you give me a link?
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  7. #6  
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    I wouldn't focus on F1 cars. The fact that F1 pilots sometimes survive a crash at extreme speed doesn't say as much about the safety of the car as about the safety of the situation. They rarely get into head-on collisions (the deadliest kind in regular traffic), they don't hit trees, they benefit from various safety measures on the track, and most of all they benefit from being watched continuously and from receiving immediate medical care when something does happen. The helmet and suit may help a little, too. I doubt the car has much to do with it.

    On improving driving safety... there is only so much energy you can safely and quickly dissipate with given constraints in mass and space. I think it's better to build an airplane that doesn't crash, than to build a crappy airplane that crashes frequently and cover it in airbags. That analogy applied to cars means the future of car safety is in the way we drive (with help of intelligent control, either by a human brain or a computer), not so much in the way the cabin is padded.
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  8. #7  
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    But if car will by surrounded by thick belt made of ammortization rubber
    or air bullon,do you think it will not survive high speed collision?
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  9. #8  
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    Quote Originally Posted by Stanley514
    But if car will by surrounded by thick belt made of ammortization rubber
    or air bullon,do you think it will not survive high speed collision?

    You want to survive. Not the car. You want the car to collapse and absorb energy. Thee brain inside your skull is subject to the laws of physics and you don't want it turned to mush or your neck to snap. Most vehicles today have a high survival rate without serious injury except in extreme or quirky situations. This is achieved through the absorption of energy by the body of the car, the use of the seat belt and distributed energy via front and side airbags.
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  10. #9  
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    No matter how a collision occurs the force of inertia will kill you at high enough speeds because your body is going one way and the force of the collision another. Unless you can direct the energy of the force of the impact around your body, so that your body continues on its way and the car itself, or part of it, absorbs the energy or is blown away by the impact, you will not likely survive the collision.
    A small vehicle, like the one you are talking about, will probably be blown apart in a serious collision unless it is built very strong, in which case it might always come out in one piece of it is built right.
    The frame and body would probably have to be built out of some material resembling a carbon fiber samari sword to be strong and absorb energy well. Having parts on the vehicle that are blown off to direct the force away from you would be important too.
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  11. #10  
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    Quote Originally Posted by raptordigits
    Quote Originally Posted by Stanley514
    But if car will by surrounded by thick belt made of ammortization rubber
    or air bullon,do you think it will not survive high speed collision?

    You want to survive. Not the car. You want the car to collapse and absorb energy. Thee brain inside your skull is subject to the laws of physics and you don't want it turned to mush or your neck to snap. Most vehicles today have a high survival rate without serious injury except in extreme or quirky situations. This is achieved through the absorption of energy by the body of the car, the use of the seat belt and distributed energy via front and side airbags.
    Funny thing is, when I bough a new 2000 Z28, I thought I would pay more for insurance. My insurance dropped! Medical expenses are a greater part of insurance premiums than the cost or type of a vehicle. The Z28 (and Firebirds of the timeframe) have such a long crumple zone, the insurance was notable lower than for my Mercury Sable.
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  12. #11  
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    I agree with the notion that you want to survive, not the car. Best/cheapest thing you can do is keep driving your cheap little car, but install a 5 point harness then use a helmet and Hans device. After that, install a proper roll cage.
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  13. #12  
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    I never heard that driver would die just because of enertia problem.

    Could somebody tell me,is it possible currently to purchase some scooter
    like that:

    www.imcdb.org/images/006/404.jpg ?
    Antislavery
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  14. #13  
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    Its simple you plus scooter may weigh 300-400 Kg , say traveling at 10M/sec=4000KgM momentum. 20000Kg bus traveling opposite direction at 10M/sec=200000KgM when you collide You lose big time.
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  15. #14 xp inflatable car 
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    http://www.myxpcar.com/

    xp inflatable car
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  16. #15  
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    Quote Originally Posted by Stanley514
    I never heard that driver would die just because of enertia problem.
    Well, I have heard of very few drivers that were killed by anything else than inertia.

    Those few died not of the crash itself but were burnt or drowned as their vehicles caught fire or fell into water.

    Without inertia, a head-on collision of two loaded trucks each moving at 160km/h would end in the trucks coming to an instantaneous standstill, undamaged, their front bumpers merely touching each other, and the two drivers having a laugh.

    Correction: in a world without inertia, vehicles wouldn't have bumpers.
    Leszek. Pronounced [LEH-sheck]. The wondering Slav.
    History teaches us that we don't learn from history.
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  17. #16  
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    Inertia can break ones neck or cause hemorrhaging in extreme cases. There are only so many Gs the various organs can stand before rupturing.



    Why not look up what some other people are doing? Massecheusettes Institute of Technology has a program designing a very different type of car. One that can spin freely and drive in any direction. These single passenger vehicles bounce off of, and drive right up against other cars. I don't know much about them, but there are a lot of ideas out there.

    The most dangerous thing is the assumptions that we have to first question before we can advance in any substantial way. Especially since vehicles have such a significant role in an individuals identity.

    Designing a safer car is admirable, but the dangers of driving come from other preventable factors as well: poor driving skills, intoxication, imbalanced hormonal fluctuation, fatigue, distractions, poor roads. So there's no reason to focus so much on making a safer car, when we can for example focus on making safer drivers, and safer driving environments.
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  18. #17  
    Forum Ph.D. Leszek Luchowski's Avatar
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    I knew some people who were into on-board IT in vehicles, much of it for safety-related applications such as obstacle detection, lane following etc.

    They told me that, sadly, in the long run, all they were likely to achieve was not a smaller rate of accidents at the present-day driving habits, but greater speeds and recklessness at the present accident rate.

    That's because research shows that people tend to drive at a constant risk level. Give them a safer car, and, before long, they will drive faster, and possibly dare longer spans without rest, balancing out the safety benefits of improved technology and trade them off for the sake of haste. This has happened with ABS for example.

    Perhaps the best thing your car can do is have a large crumple zone and lots of parts that, in the case of an accident, are considered expendable and meant to break so as to absorb the energy. Then this "constant risk" will be shifted away from human life and limb and towards repair cost and lost time.
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  19. #18  
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    F1 cars are safe because of whole structure design, even including the tire.

    "balloons from all the sides" for normal cars are design as an addition to the security system.

    These two kind of cars are designed in quite different ways, for different use, money cost and users.

    So you need to detail how you use your car and how much secure you want your car to be. Before then, all discussion is meaningless.
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  20. #19  
    Forum Professor marcusclayman's Avatar
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    i think most vehicles are used primarily for in town driving and occasional high way traveling

    does that make the discussion more meaningful?
    Dick, be Frank.

    Ambiguity Kills.
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