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Author: paulfoelpaulfoel Date: Jul 7, 2008 15:35
At what sort of speed collision is an airbag supposed to deploy. My
wife had a decent size shunt yesterday, hit her chest on the sterring
wheel etc, wrecked the front end, but the airbag didnt go off.
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Date: Jul 7, 2008 16:19
paulfoel gmail.com> wrote:
> At what sort of speed collision is an airbag supposed to deploy. My
> wife had a decent size shunt yesterday, hit her chest on the sterring
> wheel etc, wrecked the front end, but the airbag didnt go off.
Dunno, but a few years ago someone skidded across the road into the
front of my car, they were doing about 60 when they hit and the airbag
failed to deploy on my car. The repairer claimed it was because my car
wasn't moving at the time. So was that the case in your wife's accident?
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Author: paulfoelpaulfoel Date: Jul 7, 2008 16:30
On Jul 7, 3:19 pm, %%ste...@ malloc.co.uk (Steve Firth) wrote: > paulfoel gmail.com> wrote:>> At what sort of speed collision is an airbag supposed to deploy. My
>> wife had a decent size shunt yesterday, hit her chest on the sterring
>> wheel etc, wrecked the front end, but the airbag didnt go off.
>
> Dunno, but a few years ago someone skidded across the road into the
> front of my car, they were doing about 60 when they hit and the airbag
> failed to deploy on my car. The repairer claimed it was because my car
> wasn't moving at the time. So was that the case in your wife's accident?
Nah. She wasnt going that fast at the time of impact (luckily).
She rear-ended someone. Braked and skidded...
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Author: JamesBJamesB Date: Jul 7, 2008 17:28
> At what sort of speed collision is an airbag supposed to deploy. My
> wife had a decent size shunt yesterday, hit her chest on the sterring
> wheel etc, wrecked the front end, but the airbag didnt go off.
Hey, my wife cracked a rib just from doing an emergency stop at low speed.
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Author: MrcheerfulMrcheerful Date: Jul 7, 2008 18:43
paulfoel wrote:
> At what sort of speed collision is an airbag supposed to deploy. My
> wife had a decent size shunt yesterday, hit her chest on the sterring
> wheel etc, wrecked the front end, but the airbag didnt go off.
if she hit the wheel that would imply that she was not wearing a seatbelt,
in which case the airbag may be disabled to reduce injury.
there are all sorts of sensors to decide whether to deploy the airbag or
not. Also there are loads of cars about now that should have had the
airbags replaced as a service item, so they might not work in any situation
at all.
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Author: AdrianAdrian Date: Jul 7, 2008 19:39
"Mrcheerful" hotmail.com> gurgled happily, sounding much like they
were saying:
>> At what sort of speed collision is an airbag supposed to deploy. My
>> wife had a decent size shunt yesterday, hit her chest on the sterring
>> wheel etc, wrecked the front end, but the airbag didnt go off.
> if she hit the wheel that would imply that she was not wearing a
> seatbelt, in which case the airbag may be disabled to reduce injury.
Not necessarily. She may be one of these people who thinks that you need
to drive with the seat all the way forward, leaning all the way forward,
so her nose is damn near touching the windscreen, and her elbows are
almost completely bent. God knows why they do that, because it sure as
hell isn't comfortable or easy.
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Author: GioGio Date: Jul 7, 2008 20:22
> "Mrcheerful" hotmail.com> gurgled happily, sounding much like they
> were saying:
>>>> At what sort of speed collision is an airbag supposed to deploy. My
>>> wife had a decent size shunt yesterday, hit her chest on the sterring
>>> wheel etc, wrecked the front end, but the airbag didnt go off.
>
>> if she hit the wheel that would imply that she was not wearing a
>> seatbelt, in which case the airbag may be disabled to reduce injury.
>
> Not necessarily. She may be one of these people who thinks that you need
> to drive with the seat all the way forward, leaning all the way forward,
> so her nose is damn near touching the windscreen, and her elbows are
> almost completely bent. God knows...
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Author: AdrianAdrian Date: Jul 7, 2008 20:34
"Gio" x.co.uk> gurgled happily, sounding much like they were saying:
> I do not know
> what car it was but most now appear to have auto retracting seatbelts
> powered by some form of pyrotechnic charge attached to the seat frame
> and used to pull the belt tight and so prevent the driver moving too far
> forward.
They'd go off with the windbags, though.
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Author: GioGio Date: Jul 7, 2008 20:40
> "Gio" x.co.uk> gurgled happily, sounding much like they were saying:
>>> I do not know
>> what car it was but most now appear to have auto retracting seatbelts
>> powered by some form of pyrotechnic charge attached to the seat frame
>> and used to pull the belt tight and so prevent the driver moving too far
>> forward.
>
> They'd go off with the windbags, though.
You are right, they should go off together ! It has been a long day ;-)
Gio
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Author: Brad ThrustBrad Thrust Date: Jul 7, 2008 21:08
> At what sort of speed collision is an airbag supposed to deploy. My
> wife had a decent size shunt yesterday, hit her chest on the sterring
> wheel etc, wrecked the front end, but the airbag didnt go off.
The answers: (Frontal airbags)
1 - Over 18MPH.
2 - Take the maximum braking decelleration that is possible by your car with
the driest, most grippy road and best, warm tyres and double it. About
there. (More complex algorythms required for real off-road vehicles, not
soft-roaders)
3 - Most 'European' SRS-type (non Sodium azide) gas generators have an
in-vehicle 'service life' of 10 years.
4 - Realistically, if it didn't deploy, it probably wasn't meant to. It is
easy to injure someone with an accidental deployment, so the manufacturers
won't want them deploying unless the conditions for protecting the occupants
are absolutely correct.
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