Marquez's Thailand MotoGP crash analysed - 4.81s and a 26g landing

Data from Marc Marquez's frightening high-side crash in Thailand Grand Prix MotoGP practice reveals he hit the asphalt with a 26.14g impact and that the accident lasted 4.81 seconds

Marquez's Thailand MotoGP crash analysed - 4.81s and a 26g landing

The Honda rider was flicked from his RC213V at Turn 7 while on an out-lap in the latter stages of the first 45-minute practice session of the Buriram weekend on Friday morning, and had to go to hospital for precautionary checks.

He was soon declared fit and was back in action for practice two that afternoon, and later explained the cause of the crash was down to him completely closing the throttle and the engine braking locking the rear.

Data provided to Autosport by rider leathers manufacturer Alpinestars reveals the exact moment Marquez's airbag safety suit deployed, the duration of the crash and the force with which he hit the ground.

As the above chart shows, Marquez lost control suddenly - as clearly marked by gyroscopic sensor (grey line) fitted in the chest section of his suit.

The brief dip of all coloured traces marks when the rear tyre gripped again after the initial slide, and the sensors detecting that there is an issue but that the rider may be in control - which is why the actual bike highside is not considered a crash on that data.

The traces spike again when he has been launched from the bike.

With all four of the sensors attached Marquez's suit now detecting a potentially serious issue is occurring, it decides to deploy the airbag.

Marquez's airbag suit activates 0.585 seconds before he slams down on the asphalt with the right-hand side of his body.

The sensors in Marquez's Alpinestars suit feed data back to the microprocessor every 0.002s, hence the almost instantaneousness of the deployment of the airbag when the system understood the data being received was abnormal.

Marquez's suit registered a g-force impact of 26.14g when he hit the ground, with the already-deployed airbag now absorbing that. Further smaller spikes follow as he tumbles through the gravel while the flying bike's rear wheel is ripping off by the time the crash has finished.

From the airbag going off to coming to a halt after sliding into the gravel trap, the suit noted a crash time of 4.81s.

Alpinestars' airbag system will stay inflated and offer full upper body protection to a rider for five seconds.

Amazingly, wearing an airbag suit was not mandatory in MotoGP until last year - with several riders across the classes previously opting against running them.

For Marquez to have such an accident and be back on the bike and on the pace just hours later is testament to the advances made in this area of rider safety.

shares
comments
Marc Marquez saw second crash of MotoGP Thailand weekend coming

Previous article

Marc Marquez saw second crash of MotoGP Thailand weekend coming

Next article

Marc Marquez clinches 2019 MotoGP title with Thailand GP win

Marc Marquez clinches 2019 MotoGP title with Thailand GP win
Load comments
How Ducati has developed MotoGP's most versatile bike Plus

How Ducati has developed MotoGP's most versatile bike

His third place at Misano made Enea Bastianini the fifth different Ducati-mounted rider to score a podium in 2021. Amid a season that has seen one rider amass the bulk of Yamaha and Honda's success, the Ducati's versatility makes for a potent weapon, but the contribution of a former leading light shouldn't be forgotten

MotoGP
Sep 23, 2021
The next steps in the rebuilding of a stalled MotoGP career Plus

The next steps in the rebuilding of a stalled MotoGP career

Maverick Vinales’ early debut with Aprilia has been one of the most interesting plots of the recent MotoGP rounds. The results may not look standout on paper, but a closer inspection reveals just how much progress Vinales has truly made in understanding a bike that has taken him well out of his “comfort zone”

MotoGP
Sep 22, 2021
How ‘El Diablo’ and ‘the Beast’ starred in MotoGP’s Misano contest Plus

How ‘El Diablo’ and ‘the Beast’ starred in MotoGP’s Misano contest

On a day each of the podium trio could claim to be the star of the show, the San Marino Grand Prix will be remembered as a pivotal race in both MotoGP’s present and future. While Fabio Quartararo demonstrated his world title credentials just behind Francesco Bagnaia’s flawless victory charge, a new threat emerged from the shadows

MotoGP
Sep 20, 2021
How Ducati’s Aragon MotoGP win harks to its past and its future Plus

How Ducati’s Aragon MotoGP win harks to its past and its future

Duelling against Marc Marquez at the Aragon Grand Prix, Francesco Bagnaia came out on top to secure a long overdue MotoGP victory. As Marquez likened Bagnaia to a Ducati title contender of old, it appears the Italian rider could finally start to fight for wins on a more regular basis

MotoGP
Sep 13, 2021
Why Dovizioso is more of a temporary fix than a Yamaha gamble Plus

Why Dovizioso is more of a temporary fix than a Yamaha gamble

OPINION: The return of Andrea Dovizioso to the grid at Misano will be an interesting subplot to the remainder of the 2021 MotoGP season. But the circumstances that have led to the former Ducati rider ending his sabbatical point to his signing being one more of convenience than a long-term commitment

MotoGP
Sep 8, 2021
Why the British GP was a triumph for MotoGP Plus

Why the British GP was a triumph for MotoGP

OPINION: The 2021 British Grand Prix was a historic day for MotoGP. At the centre of it was Aleix Espargaro on the Aprilia after securing its first podium in the modern MotoGP era. It was something of a full-circle moment that highlighted just how far MotoGP has come in the last decade

MotoGP
Aug 30, 2021
Why Silverstone should be regarded as MotoGP's rightful UK home Plus

Why Silverstone should be regarded as MotoGP's rightful UK home

OPINION: Many of the UK’s MotoGP fans would prefer Donington Park to host the British GP beyond the expiry of Silverstone's current deal. But the circuit's fast, flowing circuit provides the best racing and should be regarded as its best bet for the foreseeable future

MotoGP
Aug 26, 2021
How MotoGP's record smasher is facing his toughest challenge Plus

How MotoGP's record smasher is facing his toughest challenge

The 2020 MotoGP season was an utterly enthralling affair, but few would argue with you if thought it the world championship was a poorer place without its biggest star Marc Marquez. In an exclusive interview, he explains the challenges he's faced in his comeback from injury and what he makes of the current MotoGP landscape

MotoGP
Aug 23, 2021