I'm the last person to say no to a safety development, but I think now would not be a great time to mandate
six airbags for all cars. Why? Because curtain airbags are, at present, pretty expensive. The good news is that Autoliv has started manufacturing airbags in India and hopefully that should mean a reduction in cost.
But I would still prefer that some more affordable technologies, which are also life-saving, like ESC and three-point belts in all forward-facing seats are mandated first.
It's also not easy to fit curtain airbags to vehicles that have not been designed to fit them. The only case where I have seen this happen is the Renault Kwid (the Dacia Spring has curtain airbags), but I still think it will likely be hard.
First, I think a good way to go would be tax benefits for fitment of side body+head airbags to a certain volume of cars sold. For example, add a clause to the sub-4m rule to provide the benefit only if head protection is fit to a certain volume of the vehicle model
sold (and not just number of variants on the market that offer them - that could lead to exorbitant pricing). Eventually, costs will come down and the manufacturer will voluntary choose to fit it as standard across the range at a nominal price increase, thanks to supplier incentives for bulk purchases which might make it less expensive for the manufacturer to fit it across the range than to a certain volume.
And I don't think the mandate should be for the number of airbags per se. It should mandate side head protection and
put the car to the test like they do with front and side impact. A lateral or oblique (like ECE R135) pole test, more precisely. You can't just have the system there, it has to perform as intended. The reason I say the mandate shouldn't be for the number of airbags is that alternative side head protection technologies (HPTs) exist. For example, convertibles and off-roaders which can't fit curtain airbags often use a combination side body+head airbag, and small cars sometimes use it too, because it is far more affordable than having a separate curtain airbag and a seat torso airbag. Example of this system:
(See pole test at 1:30)
It's important to note, though, that curtain airbags have some distinct advantages over these combination airbags. They protect rear passenger heads, and if they extend far enough forward and the inflated zone has full coverage then they also protect in oblique and frontal small-offset crashes.
Quote:
Originally Posted by ashis89 How effective are X nos. of airbags in a car which is structurally unstable? I believe structural protection should be given importance first and then, introduce airbags. |
If the passenger compartment becomes unstable in an NCAP frontal test, that has no relation to the side impact performance of the car. It is possible for the car to provide good protection in side MDB and pole impact while having unstable structural performance in frontal impact. In side impact it is important to have limited intrusion, but that has no relation to the the passenger compartment integrity in frontal impact. The NCAP penalty for an unstable passenger compartment in frontal impact doesn't necessarily mean the passenger compartment is going to collapse in a crash, it just that means that it is likely to start showing significant deformation even at a slightly higher speed than the NCAP test. But you will never see such a penalty applied in a regulation test because it's subjective. It's part of the 'extra' things NCAPs do beyond regulatory tests, and IMO it's a very good thing. In a car that I expect to perform well in an NCAP test I would be very disappointed with an unstable passenger compartment. But it doesn't mean the car is unsafe or that it has collapsed so much that fitting airbags (or more airbags) will be useless, it just means the structural performance of the passenger compartment could have been better, because it is showing symptoms that it has already reached its peak loading in the 64km/h test, which is not a very good thing.
Side airbags can sometimes help, at least marginally, even if there is considerable undesirable B-pillar intrusion in the side impact.
See example.
The side impact structural performance is unrelated to frontal structural performance (examples
here and
here).
Quote:
Originally Posted by ashis89 And crash tests should be mandatory for all car models. |
They are, but only a pass/fail homologation test for 56km/h offset frontal impact and a 50km/h side impact. Pretty much in line with developed markets in terms of regulation (though the tests are slightly diluted compared to the corresponding UN regulations).
Quote:
Originally Posted by ashis89 Crash results should be available whenever a car is launched (similar to star rating of electrical appliances or the ARAI mileage rating of a car). |
That will only happen if a Bharat NCAP is set up, and usually, even in Government-funded NCAP programs the tests are voluntary. But it would be very useful if star rating labelling was introduced. In that case, even if the car was not tested, the label would say so and sales would dip if consumers saw on the label that the car hasn't been tested, so in a way it would force manufacturers to participate voluntarily. I don't think we're going to see Global NCAP labels (except voluntarily by manufacturers), but we might see them when a Bharat NCAP is set up. (like in the USA, where labelling is for NHTSA tests but not IIHS (independent nonprofit) tests). When it is mandated, expect it to be similar to BEE star labelling.