Alpinestars Releases Marquez’s 209.9 MPH Crash Telemetry

06/03/2013 @ 3:15 pm, by Jensen Beeler6 COMMENTS

Alpinestars Releases Marquezs 209.9 MPH Crash Telemetry Alpinestards Tech Air telemetry Marc Marquez crash Mugello MotoGP 01 635x311

Marc Marquez would almost certainly like to forget this past weekend at Mugello for the Italian GP. Heads up to the spoiler alert, but not only did he make an unforced error during the race, crashing out of second place all by his lonesome (with a comfortable margin fore and aft, we might add), but the young Spanish rider also had one of the fastest crashes ever in the MotoGP Championship during Friday’s Free Practice 2 session.

Losing control of his Repsol Honda RC213V at 209.9 mph as he approached the San Donato corner during the race, Marquez had to jump away from his race bike, at roughly 170 mph, in order to avoid the rapidly approaching wall barrier. Escaping with a battered chin, a small fissure to his humerus bone, as well as minor soft-tissue injuries to his shoulder, Marquez came out of the incident in FP2 rather well, all things considered.

Now that Marquez has gotten a clean bill of health from doctors in Barcelona (he will have to undergo some physio the next few days though), Repsol and others in the paddock can breathe a sigh of relief, and begin to analyze the crash in more detail. Helping add insight to the crash, Alpinestars has released the telemetry from Marquez’s Tech Air race suit, which shows the g-forces involved during the crash, as well as the deployment time of the suit’s airbag.

Alpinestars Releases Marquezs 209.9 MPH Crash Telemetry Alpinestards Tech Air telemetry Marc Marquez crash Mugello MotoGP 02 635x317

Perhaps the most intriguing pieces of data is that both Marquez’s left and right shoulders maxed-out the suits accelerometers limit of 25g’s, though interestingly at different times of the crash, indicating his roll during the impact.

With the crash lasting 4.25 seconds, it took the airbag’s computer only 0.08 seconds to detect the crash, and another 0.05 seconds to delpoy the airbag. This gave Marquez’s body a 0.03 second margin between airbag deployment and his first impact with the ground. Impressive stuff, and certainly riders with a non-airbag equipped suit would have suffered greater injuries. By the numbers, Alpinstars highlights the crash as follows:

  • Speed at time of loss of control: 337.9 Km/H (209.9 Mph)
  • First impact with ground: 0.080 seconds after crash detection
  • First impact with ground: 0.030 seconds after full airbag inflation (airbags inflated in 0.050 seconds)
  • Maximum (recorded) energy in crash: 25g (the Tech Air system accelerometers maximum energy recording capability)
  • Duration of significant data during the accident: 4.250 seconds

Source: Alpinestars

Comment:

  1. Ronald Burgundy says:

    Scary and impressive.

    I didn’t realize he was going so fast.

    It’s somehow easy to forget this is very dangerous stuff these guys do. It’s death defying really.

    Impressive that he made the right decision at the very precise moment and the safety gear did the rest.

    The walls seemed to close in the MM crash and the Rossi crash. I wonder if they’ll look at that aspect of these crashes.

  2. TheSwede says:

    Amazing you can jump off a bike at ~175mph and walk away.. Kudos to Alpinestar

  3. article dan says:

    Yawn. Sick of hearing about it. Thats what happens when u turn left instead of right at mugellos first turn lol. Nakano’s crash down the main straight a few yrs ago looked scarier to me but hey im sat in my armchair
    And also I know it was recorded from his suit but I didnt think a human could survive 25g.

    That saying I dont really like marquez but glad hes ok after a very crashy weekend. He seems to be made of rubber.

  4. TexusTim says:

    defnitly amazing technology..Ive been down at 130.00 when the front tucked after touching the brakes in the rain…I went down at the 250 ‘ brake marker and I slide all the out the back of that corner..250 ‘ plus…no injuire, I think the wet asphault made the difference..but when you slide as long and as far as he did at that speed there is usually a lot of limb and tissue damage, simply put that suit saved his ass..literally…lol

  5. TheSwede says:

    @dan

    Disdain for Marquez notwithstanding, that was a serious crash, even if it didn’t look it. He was able to dump the bike and jump off to the right side, but if it had folded the other way when he hit the grass it would’ve launched his head straight into the wall. A healthy dose of skill and luck.

    And the graphs show that the 25g’s recorded are just peak impact forces, local to the shoulder as it slammed into the ground. It’s all about where and how the force is applied. In deceleration tests the human body as a whole can withstand peak forces of over 40g. 25 to the shoulder is one thing, but 25 to his head/neck would be a different story.

  6. BikePilot says:

    25g is actually astoundingly low for an impact force from such a crash I think, very impressive. Years ago some moto mag strapped a G-meter to a MX rider and recorded 20+ every lap (no crashes involved). As far as withstanding G it also matters quite a lot how long it lasts and how quickly it changes direction, etc.