Page 118 of 123 FirstFirst ... 1868108116117118119120 ... LastLast
Results 1,171 to 1,180 of 1224
  1. #1171
    Senior Member
    Join Date
    May 2005
    Posts
    3,487
    Like
    265
    Liked 2,031 Times in 1,116 Posts
    Yeah, saying it was "100G" has close to no informational value. Highest recorded (survived) was 214G in a 2003 IndyCar crash. Yet even below 10G can kill you if it's in a wrong direction over a longer period.

    Also check this:
    https://en.wikipedia.org/wiki/G-forc..._tolerance.svg

  2. #1172
    Senior Member
    Join Date
    May 2005
    Location
    Estonia
    Posts
    3,680
    Like
    415
    Liked 1,429 Times in 366 Posts
    Quote Originally Posted by cali View Post
    I think believing you or a guy who has done rallying himself (Dimvii) I tend to believe a person with experience.

    Sent from my GM1913 using Tapatalk
    Yes, nearly all drivers run 3SS+1S for Ss13 and Ss14, Rovanperä changed to 2 softs for Ss14 and admitted in "all live" that it was wrong choice, because road was too wet. For SS13, from km 7, everything was from damp to wet until the end.
    Colins Crest = Möldri Mätas

  3. Likes: AnttiL (27th January 2020),cali (27th January 2020),dimviii (27th January 2020),pantealex (27th January 2020)
  4. #1173
    Armchair General Mirek's Avatar
    Join Date
    Jun 2007
    Location
    Prague / Eastern Bohemia
    Posts
    20,757
    Like
    6,328
    Liked 8,536 Times in 3,450 Posts
    Quote Originally Posted by Norm75 View Post
    Doubtful, they would have blacked out if G force were that high. Fighter pilots only pull about 9G
    It's not doubtful at all.

    The magic is in the time duration of the peak and in several aspects.

    The first aspect is how high G your body parts can survive for how long time. Generally 100G over something like 0,00001s is a value which shall not kill a healthy person (you can achieve that by falling on your head in the bathroom for example - it shall not kill you but it may). Generally the acceleration is dangerous mainly for the brain. Most of the other organs have different critical damage criteria (for the soft stuff in your belly it's mainly the movement magnitude for example).

    Second aspect is that you can not measure the highest and shortest peaks by common accelerometers. You need hugely expensive gauges to catch the short peaks. These definitely aren't mounted in the rally cars, i.e. what you can measure is a value over a certain period of time not short enough to catch the highest value.

    The last aspect is that the acceleration measured by the gauge is not an acceleration of the brain. The brain is inside the head and the head is inside the helmet which is specifically designed to slow down the acceleration movement; the head is flexibly attached to the body (not that much with the HANS) and the body is flexibly attached to the seat. All of that also has its own inertia. As a result the acceleration of the brain in this crash scenario is probably much smaller than the peak achieved at some rigid point of the bodyshell.

    The 9G limit for fighter pilots allows them to withstand such acceleration without black-out for several seconds. That is something completely different than crash mechanics. the values are incomparable because if we speak about crash we mean a peak which takes for example 100000x shorter time than the turn in the fighter jet.
    Last edited by Mirek; 27th January 2020 at 11:37.
    Stupid is as stupid does. Forrest Gump

  5. Likes: dimviii (27th January 2020),eib1 (27th January 2020),itix (28th January 2020),Rallyper (27th January 2020)
  6. #1174
    Senior Member
    Join Date
    Jan 2018
    Location
    GB, Manchester
    Posts
    447
    Like
    226
    Liked 383 Times in 181 Posts
    Järveoja said that:,,According to FIA it was 100G..'' not that he himself made up some number

    Here's the whole article in Estonian:
    https://www.topauto.ee/et/jarveoja-r...ed?news_id=796

  7. Likes: AnttiL (27th January 2020)
  8. #1175
    Senior Member
    Join Date
    Dec 2016
    Posts
    408
    Like
    96
    Liked 267 Times in 144 Posts
    Quote Originally Posted by denkimi View Post
    No. One can withstand many g's if the duration is very short, just a few milliseconds. Fighter pilots take 9g for much longer times.

    But i do doubt the 90g, since kubicas crash in canada 2007 was only 75g, and he hit a concrete wall at 230km/h.
    Yes with anti G suits and many months training. Without can easily black out.
    How do Fia measure it? Do they have sensors on driver and co pilots suits? Or do they just use bullshit-o-meter.
    Brack may have survived many G's but with multiple injuries, and at what point he blacked out who knows.

  9. #1176
    Armchair General Mirek's Avatar
    Join Date
    Jun 2007
    Location
    Prague / Eastern Bohemia
    Posts
    20,757
    Like
    6,328
    Liked 8,536 Times in 3,450 Posts
    Anti-G suit is completely useless for crash. You keep comparing what is incomparable.
    Stupid is as stupid does. Forrest Gump

  10. Likes: itix (28th January 2020)
  11. #1177
    Senior Member
    Join Date
    Dec 2016
    Posts
    408
    Like
    96
    Liked 267 Times in 144 Posts
    Not really, I know fighter pilots sustain G for longer periods than what would be achieved in a car accident. I only said I doubted the 100G quoted as in my opinion one or both of them would have blacked out. To which those of you that are saying different have all said you doubt the 100G figure, or lack of any accurate measuring equipment, to prove my opinion wrong.

  12. #1178
    Junior Member TanaKa's Avatar
    Join Date
    Jul 2017
    Location
    Puerto Rico
    Posts
    18
    Like
    0
    Liked 0 Times in 0 Posts
    Great Rally of Neuville, having Toyota as Champions of last year, I think they are the ones with more power, and Ogier and Evans, did not give the size and Rovampera surpassed them, very well Lappi, Suninem did not give his 3 years. . in M-Sport, and Citroën with its Cr3 if it gave a good brand image, not like last year, I also carry a large collection of drivers, I really liked Munster being Novel in the World Cup ... Loeb, it's worth the shame to take brand points and My Tanak ,, I pay your mistake very expensive ,, greetings.

  13. #1179
    Senior Member
    Join Date
    Aug 2007
    Location
    Athens
    Posts
    21,886
    Like
    7,759
    Liked 12,380 Times in 5,483 Posts
    Quote Originally Posted by bluuford View Post
    Yes, nearly all drivers run 3SS+1S for Ss13 and Ss14, Rovanperä changed to 2 softs for Ss14 and admitted in "all live" that it was wrong choice, because road was too wet. For SS13, from km 7, everything was from damp to wet until the end.
    thats correct,but we dont know at what condition were these super softs they installed.Were new ones?or used ones with already some stages on them?
    if we dont have all data,we cant say its wrong alignment,or he dont know how to preserve his tyres etc

  14. #1180
    Senior Member
    Join Date
    Feb 2005
    Posts
    5,274
    Like
    521
    Liked 2,175 Times in 862 Posts
    Back from my second Monte trip and what I just worked out is my 21st foreign WRC event.

    A tiring but rewarding event. Wish there was a bit more widespread snow and ice about but at least it meant it was easy to get around. We stayed in Ancelle which was very convenient for stage 9/11 on Saturday which passed right through there. This year, despite a lot of advice, I went to the Col du Turini. I had to see it for my own eyes. Sadly my own eyes were a number of years too late to see any kind of spectacle or excitement. It is a tarmac car park. But never mind.

    Some photos here if anyone is interested: https://www.flickr.com/photos/949985...57712847773756

    1 by Richard Simpson, on Flickr
    2 by Richard Simpson, on Flickr
    4 by Richard Simpson, on Flickr
    5 by Richard Simpson, on Flickr
    8 by Richard Simpson, on Flickr
    10 by Richard Simpson, on Flickr
    Last edited by Simmi; 27th January 2020 at 15:11.
    My rally photos: https://www.flickr.com/photos/94998505@N03/albums

  15. Likes: AndyRAC (27th January 2020),AnttiL (27th January 2020),dimviii (27th January 2020),Eli (27th January 2020),EstWRC (27th January 2020),Ha3aP (27th January 2020),MartijnS (27th January 2020),Mirek (27th January 2020),Oscar Cibie (27th January 2020),steve.mandzij (27th January 2020)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •