Wheel puncturing Sill on a vantage
Wheel puncturing Sill on a vantage
Author
Discussion

Robbontherock

Original Poster:

55 posts

174 months

Thursday 17th October 2013
quotequote all
I appreciate the whole thread has been deleted for good reason, but one point that Bamford Mike mentioned didn't make much sense to me (I'm probably being thick though). I knew I should have asked this last night before heading to bed!,

In a photo of a recent crash damaged vantage, He said that the tub had a component which punctured the tire to avoid it being pushed into the pedal box / cabin in the even of a crash, this was to reduce the energy?

Maybe it's the way I read it, but it didn't make much sense to me, as surely the energy is not going to be reduced by much due to deflation prior to hitting the tub?

I'm wondering rather if he was trying to say was that it's designed to puncture, hook and effectively grab the tire and arrest further progress into the tub.

Not seeking to re-start the previous thread in all it's libel glory, but I'm genuinely interested to understand more of this design feature, and specifically what it should look like on an un damaged car.

Cheers
AndyR

mikey k

13,074 posts

246 months

Friday 18th October 2013
quotequote all
I'd say the structure looks to server several purposes;
  • energy absorbance by deforming
  • tranmission of energy around the tub to protect occupants, hence why it is integral to the tub
  • change direction of the wheel away from the tub to prevent intrusion
  • deflates the tyre to prevent any energy transfer/rebound from a lose & inflated tyre/wheel
A bit of a worry!

Robbontherock

Original Poster:

55 posts

174 months

Friday 18th October 2013
quotequote all
Mike,

Thanks appreciate the response.

They all seem credible reasons smile just wanting to understand better what it's design purpose was.

Cheers
AndyR

Lunablack

3,494 posts

192 months

Friday 18th October 2013
quotequote all
As a simple person I see it in simple termssmile

A fully inflated tyre is a fairly hard object........ A flat tyre is a fairly soft object...

Maybe the objective is, that if there is to be an impact into a certain area ie the pedal area of a car.... That impact is better if the object doing the impacting is soft rather than hard...smile


Would you rather be hit by a piece of foam.......or a piece of wood..... That sort of thingbiggrin

Jon39

14,929 posts

173 months

Friday 18th October 2013
quotequote all

Lunablack said:
Would you rather be hit by a piece of foam.......or a piece of wood.....
Your comment Lunar, reminded me of the question that is often put by the protest groups, who want to bring back the man (probably human of any gender now) with the red flag.

"Would you rather be hit by a car at 40 mph, or by one at 30 mph?"

Answer, I would prefer to be hit by a car that is NCap 5 rated. smile


Lunablack

3,494 posts

192 months

Friday 18th October 2013
quotequote all
I'd rather not be hit at allnono

biggrin

Laser Sag

2,860 posts

273 months

Friday 18th October 2013
quotequote all
Would also think that puncturing the tyre gives another 2 to 3 inches of rearward travel for the wheel before it starts to hit anything within the passenger cell.

divetheworld

2,565 posts

165 months

Friday 18th October 2013
quotequote all
Puncturing and capturing the tyre/wheel is like deploying an airbag. Controlled release of the air and dissipating the energy.

Robbontherock

Original Poster:

55 posts

174 months

Friday 18th October 2013
quotequote all
Gents,

Thanks, quite an interesting area of design!!!

The puncturing, grabbing then releasing the tire makes most sense to me, but that will be why I'm involved in subsea engineering and not automotive design wink

Cheers
AndyR

MollyGTi

2,373 posts

184 months

Friday 18th October 2013
quotequote all
Robbontherock said:
I appreciate the whole thread has been deleted for good reason, but one point that Bamford Mike mentioned didn't make much sense to me (I'm probably being thick though). I knew I should have asked this last night before heading to bed!,

In a photo of a recent crash damaged vantage, He said that the tub had a component which punctured the tire to avoid it being pushed into the pedal box / cabin in the even of a crash, this was to reduce the energy?

Maybe it's the way I read it, but it didn't make much sense to me, as surely the energy is not going to be reduced by much due to deflation prior to hitting the tub?

I'm wondering rather if he was trying to say was that it's designed to puncture, hook and effectively grab the tire and arrest further progress into the tub.

Not seeking to re-start the previous thread in all it's libel glory, but I'm genuinely interested to understand more of this design feature, and specifically what it should look like on an un damaged car.

Cheers
AndyR
In the instance of this accident the o/s/f wheel sheered off and was the first thing we saw, on arriving on the scene, some considerable distance from the car. Had it been pushed into the passenger compartment by the impact I imagine my very-new-son-in-law would have had serious life-changing leg injuries. Whatever the design it is brilliant in it's capacity to spare damage to the passenger cell and I am greatly reassured by it.

Robbontherock

Original Poster:

55 posts

174 months

Saturday 19th October 2013
quotequote all
Thanks for your reply Molly.

Sure it must have been a traumatic sight to see!

Glad the safety features did as they were designed smile

Cheers
AndyR

Edited to correct typo and use of better English wink

Edited by Robbontherock on Saturday 19th October 22:58