Bourdais crash at Indy
05-21-2017, 01:56 PM
#16
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05-21-2017, 02:20 PM
#17
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Its an erroneous value. things don't accelerate when they ricochet.
What a nasty crash. as mike said, this wouldnt have ended as well as it did a few years ago witih the safety improvements.
poor guy! those are some nasty injuries to the hip and pelvis. Glad he survived!
What a nasty crash. as mike said, this wouldnt have ended as well as it did a few years ago witih the safety improvements.
poor guy! those are some nasty injuries to the hip and pelvis. Glad he survived!
05-21-2017, 02:58 PM
#19
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I just watched that impact a few times... WOW, that is NOTHING like even Earnharts impact. that was 230mph directly into a 45 degree change of direction. the wall did nothing.... it didnt seem to move at all. the car did all the energy absorption i would love to see the g-meter on that one. i suppose we can calculate it pretty close, but im amazed he survived.
05-21-2017, 05:18 PM
#20
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I just watched that impact a few times... WOW, that is NOTHING like even Earnharts impact. that was 230mph directly into a 45 degree change of direction. the wall did nothing.... it didnt seem to move at all. the car did all the energy absorption i would love to see the g-meter on that one. i suppose we can calculate it pretty close, but im amazed he survived.
05-21-2017, 06:39 PM
#21
Burning Brakes
Thread Starter
232 MPH average for Dixon... 238 into the corner, it's pretty unreal. Hell, I think I saw 3rd gear at 210 mph!
Anyone hear any update on Bourdais today? Hayden is unfortunately feeling like a Schumacher outcome to me... As I said in the OP, fingers crossed for both of them.
Anyone hear any update on Bourdais today? Hayden is unfortunately feeling like a Schumacher outcome to me... As I said in the OP, fingers crossed for both of them.
05-22-2017, 01:04 AM
#23
Burning Brakes
I just watched that impact a few times... WOW, that is NOTHING like even Earnharts impact. that was 230mph directly into a 45 degree change of direction. the wall did nothing.... it didnt seem to move at all. the car did all the energy absorption i would love to see the g-meter on that one. i suppose we can calculate it pretty close, but im amazed he survived.
05-22-2017, 01:42 AM
#24
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i think the differnce of size and speed would make the energy per sq/ft about the same.
05-22-2017, 09:02 AM
#25
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05-22-2017, 09:12 AM
#26
The purpose of crumple zones and SAFER barriers is to increase the duration of the impact as this deflects crash energy from the occupant. The SAFER barrier didn't compress as much because the 1600 lb car had 1/2 the energy of the 3400 lb stock car at the same speed, but it did lengthen the time of impact.
My $0.02. As an engineer, I'm awed at how well these safety system work. It is clear someone knows what they are doing.
-Mike
05-22-2017, 10:27 AM
#27
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Yes, I think I heard during Saturday's broadcast that only about 50 RPM seperate most of the gears (4, 5, and 6).
I saw the live broadcast of the crash Saturday. Shocking. Wishing him a speedy & successful recovery. The safety crews did a great job, and were there fast. But, a few of those guys could afford to lose about 40-60 pounds, unless TV and flame suite "adds" that weight, I appologize.
Good luck to Rennlister Graham Rahal on Sunday in the Steak & Shake car.
I saw the live broadcast of the crash Saturday. Shocking. Wishing him a speedy & successful recovery. The safety crews did a great job, and were there fast. But, a few of those guys could afford to lose about 40-60 pounds, unless TV and flame suite "adds" that weight, I appologize.
Good luck to Rennlister Graham Rahal on Sunday in the Steak & Shake car.
05-22-2017, 01:59 PM
#28
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I believe this is a case of lighter is better. Do a thought experiment, imagine he hit the wall in a semi-truck at the same speed. My guess is the barrier would be much more ineffective as it's ability to absorb crash energy would be overwhelmed.
The purpose of crumple zones and SAFER barriers is to increase the duration of the impact as this deflects crash energy from the occupant. The SAFER barrier didn't compress as much because the 1600 lb car had 1/2 the energy of the 3400 lb stock car at the same speed, but it did lengthen the time of impact.
My $0.02. As an engineer, I'm awed at how well these safety system work. It is clear someone knows what they are doing.
-Mike
The purpose of crumple zones and SAFER barriers is to increase the duration of the impact as this deflects crash energy from the occupant. The SAFER barrier didn't compress as much because the 1600 lb car had 1/2 the energy of the 3400 lb stock car at the same speed, but it did lengthen the time of impact.
My $0.02. As an engineer, I'm awed at how well these safety system work. It is clear someone knows what they are doing.
-Mike
) the frontal area is less than half on the Indy car, so that might equal things out with a force per sq/ft of near the same.as far as your comparison of the Semi at the same speed, it all boils down to the rate of decel. how far things move is a critical factor . if it moved twice as far , and with double the weight, the g peaks might be the same. double the weight, double the energy. 4x the weight, 4x the energy. so, how far the walls move based on force and how it is applied and how the wall reacts is the question there. but the point of the "thought" experiment is to compare nascar (hevier and slower) vs Indy (lighter and faster) and the energy dissipation.
speed is the dominant as it is a squared factor
Death defying speeds and duration!
05-22-2017, 09:01 PM
#29
05-22-2017, 09:21 PM
#30
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That's a nasty crash, thank goodness his injuries weren't worse.
Considering the 100G impact, the safety systems did their job in preventing fatality.
The injuries to his pelvis are a reminder to keep those belts tight, including the lap belts. Much better to put impact force into the pelvis than the chest, and tight lap belts are needed to achieve that.
Regardless of whether the SAFER barrier was optimized for these cars, it surely helped significantly.
I question the idea of running these types of cars on a banked oval track with no runoff. Even with SAFER barrier, the risk seems excessive.
Considering the 100G impact, the safety systems did their job in preventing fatality.
The injuries to his pelvis are a reminder to keep those belts tight, including the lap belts. Much better to put impact force into the pelvis than the chest, and tight lap belts are needed to achieve that.
Regardless of whether the SAFER barrier was optimized for these cars, it surely helped significantly.
I question the idea of running these types of cars on a banked oval track with no runoff. Even with SAFER barrier, the risk seems excessive.