By The Numbers: Marc Marquez’s Mugello Crash

Gear, News -



During practice for this weekend’s MotoGP race at Mugello, Marc Marquez had an absolutely huge crash. Because he was wearing an airbag-equipped Alpinestars TechAir suit a) he walked away without injury b) the entire crash was datalogged. Here’s those numbers.

- 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, meaning the actual impact was likely more severe).

- Duration of significant data during the accident: 4.250 seconds.

  • charlie

    holy dam. good thing he’s ok. kudos to that techie safety equipment.

  • Garrett Nelson

    One report I read said that it was the record for fastest crash in the history or MotoGP. This kid is setting all sorts or records this year. He probably didn’t want this one though.

  • jej

    I guess injury is relative. Although nothing broke and he still raced on Sunday, he banged up his arm/shoulder/leg/chin pretty good. His chin was gigantic throughout the weekend. :)

  • Isambard

    Rossi’s crash in the race looked brutal, too. Amazed that he was back on his feet and, apparently, unhurt. Guess those airbags work.

  • Davidabl2

    I want the same tech but rated for 75mph..and in Ninja Turtle aesthetics insteada Power Ranger please.

    • Wes Siler

      They’re working on that.

  • Chris Davis

    What do the spikes during deployment represent? Are they forces received prior to hitting the ground or forces created by the airbags themselves? Are the forces a measurement of what the gear sustained or what the rider sustained? I would hope there would be a significant delta between the two, proving the relative effectiveness of the safety gear.

    • Wes Siler

      I’ve asked Astars to answer this officially, but in the meantime, here’s my answer. Realize this is coming from someone with experience riding in the suit, interviewing the engineers and whatnot, but still being a bit of a layperson.

      The suit uses accelerometers to inform its decision making, so I believe the spikes are G-force events. As you can see, the suit determines a crash is occurring and begins inflating prior to any of the big impacts. The 25g and other spikes are total force to the suit, not to the rider. If Marc had gotten 25gs all the way through to his shoulder or whatever, that body part would be destroyed.

      Having said that, I don’t know if the suit has the ability to tell you what the net impact on the rider is. It doesn’t have sensors for that.

      • Chris Davis

        Thanks. Even if it didn’t deploy prior to first impact (which was reasonably severe and pretty close to 25g on the right shoulder) at least it did so before the 19 other impacts they’ve chosen to highlight. Having accelerometers inside and outside the armor/airbag, then laying the curves over one another to illustrate the dispersion would be very telling. Ultimately the proof is in the pudding and to walk away from that mishap is mighty impressive.

        • Wes Siler

          There’s 4 sensors total in the arms and legs. They’re external, or, underneath the leather anyways. And it looks to me as if inflation began prior to any impacts occurring. The small spikes before that point are likely just braking, accelerating and turning.

          • Chris Davis

            I’m referring more to the spikes during deployment which are slightly higher than the one marked “first impact” in the case of the right shoulder. I would assume the rapid expansion of the airbags is going to be detected by the accelerometers and if they are between the airbag and leathers, that would be the case.

            • Wes Siler

              I dunno. The sensors are in the arms, below the airbags, so I don’t see them taking that huge a shock through the inflation. Might just be the Gs of getting flung off the bike?

              Astars is gettings answers for us from one of the guys that developed the suit.

    • Xiao

      I would think the spikes are from airbag deployment. The sensor is likely mounted on the suit that’s immediately next to the person rather than on the membrane that makes up the airbag, so the readings should be what was experienced at the point of the body–rider sustained. As was stated, the sensors likely saturates, and possibly at 25g, so the reality could be more. That being said, don’t forget that the linear acceleration on a body contains angular acceleration and velocity components, so a tumbling fall may measure higher impact than that without the tumble.

      I would think a proof on effectiveness in an analytical sense (i.e. with just accel data) is very difficult as the body is not rigid and can tolerate different levels of impact over the various places. Statistics and data is your only way out.

      • Tony S

        Having used the same suit Wes mentioned, you are correct. I saw one of the sensors come out of the suit of one of the legs on the suit. It looks like a cell phone SIM card at the end of a wire. Basically the sensors are tucked into the lining of suit and wired back to the ECU that is in the speed hump.
        I crashed at the track in the suit twice. The first time was a high speed (approx. 95 mph) low side where I went tumbling (trashed my helmet) and the suit deployed and I was totally fine and rode the next session, albeit with a dented gas tank. The second time as a slower low side (around 50 mph). I didn’t tumble, merely slid out and the suit did not deploy. Bike suffered more on this one though.

      • Chris Davis

        If the impacts were much more than 25g we would see a slight flatline on the readout, right?

  • AHA

    The sooner this technology rolls out to humble everyday riders like me, the better. Much as I’d like the D-Air jacket, it’s too pricey for now. Hopefully more brand offerings & wider product ranges will broaden the choice on price too. I might make do with an admittedly inferior lanyard-fired model in the meantime. I know Wes is sniffy about them but a basic airbag vest saved my pal who went down the road at 70mph. The policemen that witnessed it were shocked that he could walk and talk when they were expecting a stretcher case.

    • Wes Siler

      I’ve had the same reaction in the mere presence of a back protector. Because the vast majority of people injured and killed in motorcycle accidents are idiots not wearing safety gear, the vast majority of first responders are unaware of its existence. A policeman who’s seen 50+ 19 year olds with Gixxers die in moron-related accidents isn’t going to have the appropriate frame of reference to tell you if a lanyard airbag vest is a gimmick or not. It’s better than nothing, but real gear will always win, hands down.

      Get a CE2 back protector and a suit from a real company making real safety gear. Crash a bike, come back and tell me what happens.

  • Reece Bannister

    Anyone found any decent footage of the crash yet? the only thing I can find is onboard camera which doesn’t show much.

  • brandxxx

    OK who, from Sales and Marketing, came up with this one?!….lol

    Sorry, bad joke…

    Cool technology, glad everyone is OK.