Originally Posted by Crackerjack
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Hi again and thanks .
I take from what your saying that unless in an impact you hit on the over riders and in turn the chassis rail the air bags will not fire at the correct time ?
Thats not what I said, the overrider's are to give a bit of softness if you hit the chassis rail head on, a very solid piece of the car which would otherwise cause the srs to deploy to soon or in a very small impact where it would be unnecessary, if you did not hit the chassis member head on, the rest of the car would deform, causing deceleration and then the airbags would deploy according to how the manufacturer set them.
If the case what point the airbags ?
See above
Did the experts tell you how or why the bags fire ?
SRS sensors within the car. To stop you getting injured as much.
My understanding is it is not the impact but the sudden slowing that sets this type of SRS off .
Depends how the manufacturers set them. In the US, the setting compared to Europe for example are different due the the fact seatbelt wearing is not law in much of the US.
Not just the rail sensors but also the Airbag control unit must at the same time register .
Everything happens in milliseconds, so yes.
A RR classic with srs that hits a Roo won`t have the Airbags deploy .
Who says. How big is your Roo.
A Discovery 3 that hit a Roo will .
Again, how big is your Roo.
I`m more interested in correct Information than who`s right or wrong or anything else and the written ( or typed ) word holds the emotion of the readed which may not mirror the writers .
What are you trying to get at?
I presume from 90`s RR club and Experts that i`m rubbing the wrong way and the mirrors not reflecting well .
??
As said if you know of any documentation regarding RR classic SRS in particular , i`d like to read it or Discovery 1 or P38A as they are all very similar and even share many parts .
Call Rover Australia, they may be able to shed some more light on it.
Cheers
Remember, me and many others on this site are just owners and enthusiasts who are giving their time to answer other people questions, some are more expert than others, I am just recalling conversations with people from the mid '90's on question similar to yours, SRS was fairly new back then so we were all interested.
While I understand the fundamentals of SRS, I am no expert on individual vehicles, all I know that the RRC was one of the first vehicles to come out with SRS on a full chassis vehicle (correct me anyone) and so the system had to be re-engineered, as a full chassis has very little give in certain areas compared to a monocoque car construction, hence, to give a little bit of give, my understanding is that, the overrider's (I also remembered on occasions being referred to as "crush cans") were fitted to compensate for the stiffness or solidness of the end of the chassis rail.
Just as an addition, any bull bar that was fitted to the RRC with SRS, had to comply with the system. The mounting points replaced the overrider's with collapsable mounts so the SRS system deployed correctly (someone like ARB may be able to confirm this)
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