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Old 24th June 2019, 18:26   #1
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Default Crash video: Santro t-bones an Endeavour, causing it to topple

In the video, a Hyundai Santro can be seen toppling an Endeavour. The reason given is that the speed of Santro disturbed the Centre of Gravity of the Endeavour thus making the Endeavour to lose balance. But this still shows that having a bigger sized car can only give a false sense of security.

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Old 24th June 2019, 18:34   #2
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

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Originally Posted by gopalnt View Post
In the video, a Hyundai Santro can be seen toppling an Endeavour. The reason given is that the speed of Santro disturbed the Centre of Gravity of the Endeavour thus making the Endeavour to lose balance. But this still shows that having a bigger sized car can only give a false sense of security.
Wow, that is something I never expected to see. Shows how unpredictable an accident can be, and how the best lab tests cannot even imagine this kind of a real life scenario

Hope all the occupants were buckled up and didn't have any major injuries.

Last edited by SmartCat : 24th June 2019 at 19:11. Reason: Removed video from quote
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Old 24th June 2019, 18:40   #3
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

Weight X square of speed approximates kinetic energy. The Santro's speed plus it's wedge like nose which got under the belly of the Endeavour caused the roll over. We can't conclude that a bigger car gives us a false notion of safety. Just that in a particular circumstance a 1000 kgs car at xyz speed can roll over a very slow moving 2000 kgs car. The experts can add more.
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Old 24th June 2019, 18:48   #4
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

More than the toppling, key thing to know is how the passengers in both cars fared. Assuming passengers were belted, I assume that the passengers in the endeavour would have had a lesser chance of injury inspite of toppling, and that is what is important.
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Old 24th June 2019, 18:52   #5
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

By the looks of it, the Santro collides with the Endeavour somewhere near the rear door and rear wheel region. This makes the Endeavour rotate around the front axle, creating a moment strong enough to lift the car around the front axle (at first) and then rear axle.

No wonder the high CoG is the culprit. But I am surprised that the anti-roll bars didnt work as expected. Does the Endeavour come with one?

Despite the obvious error of judgement by the Endeavour, I hope the occupants are all safe and sound.
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Old 24th June 2019, 18:55   #6
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

The Santro's wedge like nose had nothing to do with the roll over. The Santro hit the Endeavor at almost right angle and the Endeavor started to spin around. The rear right wheel dug into the ground and hence the roll over.
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Old 24th June 2019, 19:10   #7
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

Surely an unexpected outcome.
The accident however, was caused by the driver of the Endeavour. He thoughtlessly turned, without bothering to wait for oncoming traffic, or grossly misjudging the speed of the oncoming car. Could be his overconfidence, assuming everyone would take corrective measures, for his "big" car
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Old 24th June 2019, 19:23   #8
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

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Originally Posted by V.Narayan View Post
Weight X square of speed approximates kinetic energy. The Santro's speed plus it's wedge like nose which got under the belly of the Endeavour caused the roll over. We can't conclude that a bigger car gives us a false notion of safety. Just that in a particular circumstance a 1000 kgs car at xyz speed can roll over a very slow moving 2000 kgs car. The experts can add more.
I think, more than the size, it is the relatively higher center of gravity (relative to the track width) which makes a tall SUV to be less stable than a low slung sedan (sports car will be even more stable). In this case, the angle at which the Santro has struck the Endeavour could have made any other car to topple.
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Old 24th June 2019, 19:25   #9
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

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Originally Posted by Rajeevraj View Post
More than the toppling, key thing to know is how the passengers in both cars fared. Assuming passengers were belted, I assume that the passengers in the endeavour would have had a lesser chance of injury inspite of toppling, and that is what is important.
I don't see the Santro's bonnet crumbling at all. The driver of that can also be seen opening the front door. We can assume that the Santro braced the impact well. And as far as the Endeavour is concerned, it has toppled but everything including the windows seem to be intact. Not sure about the passengers though.

Last edited by gopalnt : 24th June 2019 at 19:26. Reason: Contextual change
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Old 24th June 2019, 19:59   #10
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

Cant understand why people are getting surprised by the fact that, the SUV toppled !

Its simple physics.
Higher center of gravity = Less stable
Lower Center of gravity = More stable

A Honda Civic or a VW Jetta in place of the Ford Endeavour would have fared much better.
In case of a frontal head on collision between the Santro & Endeavour the result would have been different. Santro will get much more damage than the Endeavour.

Attaching few more examples-

A Fiat Avventura, T-Bones a bus and the bus topples-

https://www.team-bhp.com/forum/road-...ml#post4131639 (Pics: Accidents in India)

Please view this you-tube video-
The cars and vans with higher center of gravity fared much worse than the sedans.




The Swift Dzire accelerated at the right moment to avoid getting hit by the Santro!

Last edited by Samba : 24th June 2019 at 20:08.
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Old 24th June 2019, 21:19   #11
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

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Originally Posted by gopalnt View Post
But this still shows that having a bigger sized car can only give a false sense of security.
This is a freak replication of a well trained pit maneuver.

Last edited by SmartCat : 24th June 2019 at 23:12. Reason: Removed video from quote
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Old 24th June 2019, 22:40   #12
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

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Originally Posted by VaidhiR View Post
No wonder the high CoG is the culprit. But I am surprised that the anti-roll bars didnt work as expected. Does the Endeavour come with one?
.
Anti roll bars would not play any role here because they are supposed to limit body roll during high(er) speed cornering. They are almost helpless at a low speed rollover of the entire car
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Old 24th June 2019, 23:08   #13
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

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Originally Posted by niteshbids View Post
Anti roll bars would not play any role here because they are supposed to limit body roll during high(er) speed cornering. They are almost helpless at a low speed rollover of the entire car
True. Also, the antiroll bars are designed to limit the 'body' rolling in relation to the wheels (which are in contact with the ground). They don't help if the wheels themselves loose grip and come off the ground.
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Old 24th June 2019, 23:17   #14
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

That DZire had a great escape; that said more than going into the physics of the accident, I think there must be a speed bump or barricade at such places where the vehicles are made to slow down and allow the Endy or any other car to turn safely. Fault lies with the Endy for not allowing the Santro to pass before negotiating the turn.
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Old 25th June 2019, 08:09   #15
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Default re: Crash video: Santro t-bones an Endeavour, causing it to topple

I am happy to see the out come of the crash. Both cars did good (at least from the visuals).

Santro, even being two decade old design shows the quality of Hyundai. Crumple zone absorbed the impact well, there are no visual indication of cabin structure damage & occupants seemed to walk out on their own.

Where as, although Endeavour turned turtle but one can clearly see the side AirBags are deployed & roof is taking the full load of this 2+ ton vehicle without getting crushed or deformed.

If the Santro had ABS (along with some good tyres) may be it could have avoided the impact.

Only thing one can ask is the Anti roll over protection for this Endeavour but I guess the road design & perfect timing of the impact & worst possible place created this unique condition to allow CG take over & cause this roll over.

Last edited by NaXal : 25th June 2019 at 08:20. Reason: Typos correction
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