After reading the whole thread I found one post in which I can express myself in a good way,so here it is(Iron Rock sir,5 stars for this post):
Originally Posted by Iron Rock
In some cars its true airbag deployment is dependent on seat belts. This is done for safety reasons.
Simple it is..airbags are not always safe.In other words airbags like the active airbags of Skoda Rapid etc are sometimes life threatening instead of life saviors.
Hence the best combo is seat belts+airbags.
There is an SRS mentioned in airbags as they are designed to work in tandem with seat belts.Btw the airbag also gets deflated immediately as you are not meant to get suffocated on an inflated airbag. So basically the design is your seat belt gets tensioned and your airbags deploy next all happens in microseconds offcourse - ideally this should minimise damage.
Well after experiencing airbags open and deflate in front of me twice what I have experienced is:-
First of all,what is SRS?Simple SRS means S
ystem,in straight words,these airbags are nothing but just a supporting safety feature which works with seat belts. How this SRS system works?
It is simple,your car meet with an accident-within microseconds the sensor gets activated-it results in seat belts getting tightened and hence holding the passengers in place and after a fraction of a microsecond as seat belts tightens,your airbag inflates with a small blast.
By this way,passengers are saved from facing the sudden retardation and their body is saved from suffering a large part of energy/momentum change.
Please do note that an airbag is essentially an exploding device meant to open in micro seconds and save lives but it will also inevitably cause injuries if not used in conjuction with a seat belt.
+1000 What makes the active airbags dangerous?
Actually in the systems like of active airbags there is no process like SRS.Instead the process is downright simple "accident-trigger-open airbag".
Now in this case what happens is that if the passenger has worn seat belts then he/she can survive but if the seat-belts are not worn by the passenger then what happens is:
- Firstly the passenger gets thrown toward the wheel due to collision.
- Now to add more to that retardation your airbag comes at full force form front and push you back like a bullet has hit your body.This can easily crush your chest,break your neck etc.
- While in case of SRS airbags-no seat belt ties means no airbag deflation and this is more safer as compared to the 'active' airbags.
Real life accidents are extremely complex, no matter how much we simulate with crash test dummies in controlled environments.
The basic difference between real life accidents and the simulated ones is the difference in speed.
The ones simulated are done at minimal speeds like 60 kph and some are done at maximum 60 mph.
Else truth is that no car in the world is made such a way that it can guarantee the safety of passengers at even 100 kph.At the speeds like 140-150 and above,the passengers stand no chance in case of an accident,instead the car gets sliced like a knife does to butter irrespective of what the car is.
I many times myself do such speeds but never recommend anyone to do it because at such speeds you never stand a chance in case anything goes wrong and the biggest misconception in the minds of people is that the airbag equipped car will keep them alive even if they hit a truck at 150 kph. Here is a video to show you what happens at some elevated speeds: