[pjalexandre]

Maybe it is me but I don't see any brake lights at all.

He dropped a wheel while loaded on the right side and that sent him to the left guardrail. Kind of how people at Summit T3 drop a wheel off on the right and end up shoot hard left into the tirewall.

I would say the GT3 was on a ride once the wheel dropped. I was surprised to not see brake lights as he headed left into the guardrail to reduce energy. The best would have been for him to hit left and stay there instead of bouncing back across the track to do even more damage in a harder hit.

It seems to me that the 2nd hit typically ends up doing considerable more damage/harm. Which is why we always stress to keep your foot on the brakes!

I don't see how a quick lock up would have straightened up his trajectory when the car is pointed left. If anything locking up the wheels ensures that the vehicle continues traveling in the direction it was headed. We teach this at BSR. Newton proved it for us so we don't have to on the internet.

Originally Posted by Potomac-Greg

This video suggests a problem I've never seen discussed in any detail. When the GT3 starts to lose it, he no doubt hammered the brakes. But there was no lockup (can't be with ABS), and as a result, his tires maintained forward motion, and he veered left. A quick lock up would have straightened his trajectory, and might have resulted in a different result. Am I crazy?

PS, if the guy was going to stop to help he should have gone past the wreck.

[Potomac-Greg]

Originally Posted by pjalexandre

I don't see how a quick lock up would have straightened up his trajectory when the car is pointed left. If anything locking up the wheels ensures that the vehicle continues traveling in the direction it was headed. We teach this at BSR. Newton proved it for us so we don't have to on the internet.

Where you're pointed and where you're headed can differ! As a car rotates in a spin, the trajectory changes and that lags the heading. Lockup holds the heading and could change the outcome.

[pjalexandre]

Absolutely correct, when you lockup the wheels you hold the trajectory. The only problem is that he is "headed" into the wall which is my point.

Originally Posted by Potomac-Greg

Where you're pointed and where you're headed can differ! As a car rotates in a spin, the trajectory changes and that lags the heading. Lockup holds the heading and could change the outcome.

[smdubovsky]

Originally Posted by Potomac-Greg

Lockup holds the heading and could change the outcome.

Originally Posted by pjalexandre

Absolutely correct, when you lockup the wheels you hold the trajectory.

And how exactly do you lockup the wheels on a GT3?

[pjalexandre]

You don't but that is another point.

Originally Posted by smdubovsky

And how exactly do you lockup the wheels on a GT3?

[roundel]

Originally Posted by Potomac-Greg

When the GT3 starts to lose it, he no doubt hammered the brakes. But there was no lockup (can't be with ABS), and as a result, his tires maintained forward motion, and he veered left. A quick lock up would have straightened his trajectory, and might have resulted in a different result. Am I crazy?

PS, if the guy was going to stop to help he should have gone past the wreck.

Originally Posted by pjalexandre

You don't but that is another point.

Seems that was exactly the original point.

[pjalexandre]

Which point because now my head hurts.

We know that you cannot lock up the brakes on a GT3.

We know that a car that is in a spin and you can lock up the brakes will for the most part hold the trajectory that it had once the wheels lock.

The car in the video dropped a wheel, pitched and was headed for the left guardrail, if it could have locked up the brakes it still would have hit the left guardrail and not magically straightened out.... That is my friggin point ABS or not nothing was saving that one. All he could have done was prevent the 2ndary hit on the right side and that is debatable since none of us was there.

Originally Posted by roundel

Seems that was exactly the original point.

[Vicegrip]

perhaps you can't lock them but you can get them to have less traction.

[Potomac-Greg]

I think I had a point but it didn't apply in this case. How's that for compromise?

[pjalexandre]

I am happy to