https://www.fia.com/news/fia-concludes-investigation-formula-2-accident-spa-francorchamps
FIA CONCLUDES INVESTIGATION INTO FORMULA 2 ACCIDENT AT SPA-FRANCORCHAMPS
Following the impact of Giuliano Alesi’s car with the barrier, the debris from broken components was spread onto the race track. In an attempt to avoid Giuliano Alesi and the debris, Ralph Boschung and then Anthoine Hubert moved to the right, leaving the track and entering the run-off area of Turn 4. The reaction of Ralph Boschung and Anthoine Hubert to the accident of Car #20 started prior to the yellow flag being deployed, due to the proximity of these cars at the time of the incident. The yellow flag was deployed by the marshals at Post 5 (Turn 4) 1.8 seconds after the impact of Giuliano Alesi’s car with the barrier.
During this manoeuvre, Ralph Boschung slowed more abruptly than Anthoine Hubert, who took action to avoid a collision by moving further to the right. Despite this move, Anthoine Hubert made contact with the back of Ralph Boschung’s car, losing his front wing and causing a right rear tyre puncture to Ralph Boschung ahead.
Travelling at 262 km/h and with his front wing missing, Anthoine Hubert lost control and was set on a trajectory towards the barrier on the right-hand side of the Turn 4 exit run-off area, which he impacted at an angle of approximately 40 degrees at a speed of 216 km/h, generating a peak force equivalent to 33.7g.
In the meantime, Juan Manuel Correa was approaching the scene of Giuliano Alesi’s accident. He was travelling approximately on the racing line, towards the right-hand side of the track on the exit of Turn 4 when he hit debris left behind from Giuliano Alesi's car. The impact with the debris was approximately 1.5 seconds after the yellow flag had been deployed and it resulted in front-right suspension damage and the loss of the front wing, causing Juan Manuel Correa to lose control. His car veered to the right, off track and into the run-off area of Turn 4, setting him on a trajectory that would result in the car-to-car impact with Anthoine Hubert 1.6 seconds later.
Juan Manuel Correa hit the left-hand side of Anthoine Hubert’s car at an approximate angle of 86 degrees and a speed of 218 km/h, while the car of Anthoine Hubert was virtually stationary. Car #12 (Juan Manuel Correa) and Car #19 (Anthoine Hubert) experienced a resultant peak force equivalent to 65.1g and 81.8g.
好痴線如果係F1速度 應該兩個都RIP咗
上山果條路真係好易炒 根本上緊去係睇唔到前面咩事 上到頂如果前面有架車停係度跟本無時間反應
In summary, the findings of the investigation are as follows:
• A chain of events resulted in a protracted and complex crash sequence involving four drivers, which ultimately led to a high-speed ‘T-Bone’ type impact between the cars of Juan Manuel Correa and Anthoine Hubert.
• The dynamics of the car-to-car impact in terms of speed and trajectory were such that an extremely high level of energy was transferred and dissipated, translating into non-survivable trauma to Anthoine Hubert and very serious injuries to Juan Manuel Correa.
• There was no single specific cause but multiple contributory factors giving rise to the severity of the accident were identified, following a detailed analysis of the various phases of the accident.
• The investigation found no evidence that any driver failed to react appropriately in response to the yellow flag signal or to the circumstances on track.
• The reaction of marshals and race control in deploying signaling and rescue services in relation to the accident is considered timely and good.