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Hondu
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CarPhreakD wrote:
TonyE wrote:
_Alex_ wrote:
Here's TSX test results, look closely as it reveals very interesting bits of information http://www.iihs.org/ratings/rating.aspx?id=1671&seriesId=460
Two tests of the TSX were conducted because the onboard (car interior) cameras failed during the first test. Also in the first test, the driver side curtain and side thorax airbags deployed, but they did not in the second test. Honda subsequently provided data showing that the side airbags are close to their deployment threshold under the small overlap test conditions. The restraints and dummy kinematics rating is based on the second test. Injury and structural ratings are based on both tests.
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In the second test, the dummy’s head contacted the frontal airbag but then slid off the left side as the steering column moved to the right. The side curtain and side torso airbags did not deploy. |
I would say that:
- test results are not repeatable
- test results may/will vary a lot
In this case if IIHS would sample only single TSX it would post better overall score.
I wonder how repeatable "regular" crash tests are comparing to this newly added "small overlap".
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At the risk of sounding political.. these tests are all political.
We have a nanny state.
On the one hand they want completely non polluting cars that run on fairy dust...
On the other hand they want the occupants not to run any risks.
So, to get over the fact that fairy dust does not exit, the manufacturers build light cars that can be powered by light, efficient engines.
But, to satisfy ever more stringent crash tests, the manufacturers will need to build tanks.
The truth is that this is impossible. Like the periodic California mandates to build cars that might be built with the physics of 300 years hence.. perhaps. But since these folks never took any Science (*) in High School or College, they think that just by legislating their wishes, the physics will appear out of nowhere.
If you build it, they might come.
But if you legislate it, you're just pissing into the wind.
At some point reality will intrude... hopefully in a few months.
(*) Political "Science" and Economics are most definitely NOT Science.
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Every other week at work our bosses reads and posts photos from Thank You letters forwarded to us from top management, from families that walked away from severe collisions with minimal to no injuries. I can only imagine how incredibly motivating it must be for the chassis guys to understand how their work literally saves lives.
I can also imagine how it must feel to know that while these families escaped with their lives, several more were not so lucky.
NHTSA and IIHS can be rightfully criticized for much of their policies, but by the same token these standardized tests are one of the few yardsticks we have to ensure that cars can protect its occupants in the worst case scenarios. In the interest of progress, safety measures SHOULD be made ever more stringent. People always complain, but whenever new crash test scenarios are created, automakers always end up meeting them. These test results are what motivates (not just regulate) automakers to create the highest quality and safest vehicles they can while also going for seemingly the opposite goal of lighter and more fuel efficient cars.
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The opposite can be achieved, but it usually means more expensive materials. For example, higher strength steels can improve crash worthiness and lower weight at the same time.
Of course, carbon fiber can do the trick as well, but until someone finds a way to substantially lower the cost, I don't forsee that being a solution on high volume cars for a long time (though I believe BMW is spending a lot of money on CF right now).
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CarPhreakD
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No, it does not and SHOULD not resort to carbon fiber or "expensive materials". Even use of extruded aluminum should be kept to a minimum, considering mass produced "volume" vehicles.
There is nothing wrong with steel. Arcelor-Mittal recently swung by my workplace with a couple of displays showing how, with some thoughtful use of different grades of HS steel, as well as intelligent chassis design, you can achieve a stronger yet significantly lighter chassis, on the order of several KGs. The use of "exotic materials" should only be considered as a last resort- and if applied haphazardly are nothing more than a bandaid solution to a fundamental design problem.
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Hondu
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CarPhreakD wrote:
No, it does not and SHOULD not resort to carbon fiber or "expensive materials". Even use of extruded aluminum should be kept to a minimum, considering mass produced "volume" vehicles.
There is nothing wrong with steel. Arcelor-Mittal recently swung by my workplace with a couple of displays showing how, with some thoughtful use of different grades of HS steel, as well as intelligent chassis design, you can achieve a stronger yet significantly lighter chassis, on the order of several KGs. The use of "exotic materials" should only be considered as a last resort- and if applied haphazardly are nothing more than a bandaid solution to a fundamental design problem.
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I agree, but you misunderstand, when I said more expensive materials I was not meaning exotic materials. Higher strength steels are "more expensive steels", compared to their lower strength counterparts. Of course CF and Al are even more expensive, but not necessary with good design and engineering using high strength steels (I believe with high strength and UHSS being the latest and greatest).
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