Porsche 911 GT1 Lemans Flip

[thesymphoniclife]

If he actually hit the gas harder the Centrifugal force of the rotating wheels would / could have actually balanced out the car enough to not lift it off the ground.

[ejkddorai]

Achievement Unlocked: Backflip.

[SpeedFireARL]

Все просто, 911 двигался в зоне разряженного воздуха от впереди идущей машины, и на пригорке переднее антикрыло не смогло обеспечить достаточной прижимной силы.

[JessManc1987]

@SpeedFireARL That's what I was going to say

[TheCarlsonsRaiders]

It's rather simple what happened. The open top car in front of him was blocking air flow to the GT1, so he didn't have much downforce. As they came over the little rise, what air there was got under the car, and with no clean air above to push it down, the car took off. Considering they took the 24 Hours of Le Mans 1-2 with the same car, I'd say it's simply a lot of circumstances coming together at the same time to create the problem. The 911 GT1-98 still rocks.

[roddy0]

@TheCarlsonsRaiders The problem is that these cars are on the bleeding edge, which is how they win races. The car has just enough downforce and no more, to maximize straight line speed. In this case it came back to bite him, lesson learnt hopefully. Stick half the car out of the slipstream when going over a rise.

[leonardofredrizi]

very good aerodynamics

[Darkstar9009]

Houston we have lift off...

[halow4]

that car does a better front flip than me!

[Y00p]

Which is saying something, considering it's a back flip...

[halow4]

i meant back flip my bad lol

[alexvoce]

probs coz ur a fat cunt!

[halow4]

wow u gotta be the idoit and be so immature. i was just joking about the cars flipping ability.i am actually quite athletic thank you very much

[insane1mikeee]

Is this realy from le mans, i cant remember this part of the track.

[kevinmosleyI]

Petit Le Mans. It's a 10 hour enduro at Road Atlanta.

[BishopCR7]

It's not Le Mans, it's Road Atlanta

[brup123]

The guy behind him must have had a spectacular view.

[marvinbenz]

low front ride height and a higher rear ride height improves the cars angle of attack thus reducing lift on the nose of the car,that would have fixed it

[Bowlcephus]

the pit crew chief said "Do a flip!!!" ...and he did

[madduck09]

1.-copy and paste

2.-paste it in 2 different videos

3.. hold breath for 10 secs

4.- look at your hand

[NielsShoe]

Whys the bottom flat and not got channels in it?

[andylui3333]

aerodynamics i think

[lukers125]

It's a 911 gt1'98!!

[esotoracing]

The reason for the porsche flip is the car infront took downforce away from the front of the porsche. Thats the ONLY reason. The same exact thing happend to the BMW V12 LMR at the same exact place becasue it got too close to aonther car at tha critical point on the track. Telemetry does not lie.

[JayVanDeLay]

PEOPLE PAY ATTENTION! THE PHYSICS OF THIS CRASH IS NOT SIMPLE!

Racing cars are shaped like airfoils because that's the most drag-efficient format for a closed-cabin racer. The bottoms are perfectly flat and are angled downward 2-5 degrees. If the rear suspension is not sufficiently stiff, the back end will pull down too far and the car becomes just a regular airfoil, which provides upforce. That pulls the car off the ground and the big wing pushes the back end down, causing it to backflip.

[esotoracing]

The flip has NOTHING todo with the rear suspension being too soft. youve been spending too much time on your playstation

[JayVanDeLay]

It's not soft by our standards, but when you're dealing with around 70%+ of the downforce of the car, any movement at the back end is enough to pull it that 1 degree and turn it into an airfoil.

And how would I know this from watching too much PlayStation?

[BMWizardofOz]

sorry but I think the other one is right, the flip had not much to do with "too soft" rear spring, but much more with the slipstream of the car in front.

Also the bottom of the car especially at these late 90s GT cars is not perfectly flat, as the had aero devices (diffusors) at the front and the back of the car.

What happened here was very similar to the Mercedes accidents at the same aera, and where mostly caused by slipstream while going over a crest, which caused the front to lift a little

[JayVanDeLay]

Too soft is deceptive. It doesn't mean it was actually soft, it means it was just giving enough that at that unique position, the shape of the car caused aerodynamic behavior to fundamentally change, equivalent to flipping an airplane wing right side up. There's no way that enough air just built up under the front of the car to do that.

[BMWizardofOz]

but I don´t think a harder suspenion would have solved the problem.

The Porsche GT1 was in a close slipstram of the open prototype Porsche, which means that it´s normal downforce is,´t working right, then at the small crest (hill) it looses a bit of touch with the Ground at it´s frontwheels, which causes the little front diffusers not to work properly anymore, and let´s the whole Areo behaviour change as air comes under the car and the angle of the car (like you described)

[JayVanDeLay]

Dude, if you understand how an aerofoil works it'll make a lot more sense. Ground effect only works when the bottom of the car is angled downwards. The front lifted a small amount, and because the rear of the car was too low, the angle of attack became too shallow and the ground effect downforce was lost, turning the car into an airplane wing.

[BMWizardofOz]

where from do you think I dont know how aerodynamics work?

OK you insist, that this crash was caused mainly by the suspension of the rear going down too much, that´s possible, but the same effect also happens if only the front gets lifted a bit, especially when the aero isn´t working right (slipstream), and I think that´s the main reason, as it happened often before e.g. with group C cars at Nordschleife at Pflanzgarten, where air got underneath the cars, and made them flip.

[JayVanDeLay]

Prove you recognize how the car could have acted like an aerofoil and I'll acknowledge you understand aerodynamics. For the flip to have been caused by the aerofoil of the car, the pressure under the front of the car would only have to be equal to the pressure at the rear, not so much greater that it alone flipped the car.  Also, the slipstream couldn't have played a part. The air pressure close to the ground would be LOWER because of it, not higher.

[BMWizardofOz]

but then why did these flips of the GT aera of the late 90s only happen when they were in slipstreams (Mercedes at Le Mans and Porsche at Road Atlanta).

At least at the LeMans flip of the Mercedes it was always given as a reason, that the lowered downforce due to the slipstream, together with a hill on the road caused the accident.

[Michaelingolfhansen]

Do You meen that the problem could be that the rear ride-height becomes lower than the front ride-height, due to soft rear suspension!

That would make sense, because the front has to be lower than the rear in order to get suction-effect!

[JayVanDeLay]

That is exactly what I'm saying, well-put. I don't wanna completely discredit BMW, I think the hill crest had something to do with it, but the fundamental reason was that the rear was too low.

[scottN1980]

Porsche are a very experienced racing team and I am pretty sure that porsche would not have sent out a car that would take off by itself without other influences. He crested the hill right at the point the airflow from the car was at it's most turbulant. Like a wake behind a speed boat. There is a point not too far behind the boat where the wakes from each side of the boat rejoin in the middle causing high pressure. In the porche's case, it was enough combined with the crest to grab the nose

[eleanorroosevelt1]

just push forward on the stick to get the nose back down.

[RatchetandClankNXTG3]

what an idiot

[eleanorroosevelt1]

you too!

[RatchetandClankNXTG3]

you know how???

[eleanorroosevelt1]

i have a college degree in know how

[RatchetandClankNXTG3]

wow...even i know thats not a class or a major

[eleanorroosevelt1]

i sent away for it over the internet. they offer degrees in a multitude of disciplines.

[RatchetandClankNXTG3]

wow...you must be 10 years old. even my little bro knows better and hes 5

[eleanorroosevelt1]

no, I'm 11 for your information.

[RatchetandClankNXTG3]

so......? some 10 through 13 year olds on youtube piss me off and others. but fortunately youre not one of them.

[eleanorroosevelt1]

I'm glad you like me then! Thank you for the compliment.

[RatchetandClankNXTG3]

no seriously there are so may who like their barbie bullshit and spam other people so they can look at their rabbit, that pisses me off. and the fact that most are pussyblockers. But you, are not one of them!

[Lucario1545]

LOL FTW

[avsti]

oh my god, that's amazing!

[2jzsupra98rock]

nice back filp! a first for porsche! i give 100/100!

[1LordiFan1]

lol

[LordParkour]

Haven't they heard of something called front-downforce?

The same happened multiple times with Mercedes CLR...

Just because someone is driving in front of it, it should never loose downforce like that...

To compare, look how the fronts of new LMP-1 og LMP-2 cars are designed. Very different!

[goalieman1626]

do you understand the concept of downforce? downforce is good for coners not long straights. The reason why so many cars kept fliping there is because of the dip. When you have a dip like that at high speeds, air will get under the car and force it airborne.

[dumbCrakers]

its not the dip, its the slip stream that gets caught underneath the underbody diffuser, u could even see how flat it is uner the car when it flips, thats part of the difffuser, it is used to reduce drag but it sucks for helping with slip stream cause it doesnt.

[inteliosohg]

At :16....nice Ferrari 333SP, great race cars!

[martinjecar]

thats an 911 asssssssssshoooooooooooooooole cause the merc crashed in monza

[ColtOwned]

the car is a mercedes. not porsche! and both cars from mercedes had this wrong constuction! they both "flied" ^^

[sidewalk4004]

You fail. This is a porsche. The other one is a mercedes.

[spprtatpscm]

@ColtOwned Yea this is a porsche 911 gt1-98. Though they might look the same they're not. Mercedes did the same thing, but the BMW LMR and this porsche did too. The hills a leman races were too high so many cars have flipped and they eventually lowered them.

[Chuichupachichi]

The people at Porsche got bored from having already accomplished everything else in endurance racing. That day they just thought they'd add something different to their statistics.

[yfhtaytay]

pwnt

[sesarathor]

For these flips the simply put the spoiler higher what are u guys talking about

[rpballer46]

all the air got under

[gilluminati]

the air flow is changed following that close behind another car, and angle of attack is also changed by going uphill. Downforce can become LIFT with very minor changes in geometry, like how fighter jets can fly upside down.

[natedog2008]

they should rethink the cars if they can lift that high and flip yes their going fast but everyone should have a weight add on so there heavy enough to stay on the ground i mean there low enough things like that shouldnt really happen ... they all should be doing that then

[sidewalk4004]

They probably, if anything, should just increase drag and downforce on their aero. It could have been their setup that caused it.

[spprtatpscm]

@sidewalk4004 one of the other reasons for cars flipping is if they tail another car. Turbulence in the air from the car in front is what was partly due to the mercedes clr crashes because apparently the engineers told the drive not to "trail the car in front" of them.

[rawoodruff]

This was Road Atlanta, not LeMans.

[sidewalk4004]

Why is there controversey, who said it wasn't Road Atlanta???

[KrZyChUuU02]

@rawoodruff

That's ALMS- American Le Mans Series, but track is Road Atlanta. That's all.

[bosepunkt]

the motors sound we hear sounds like nascar

[vikirad]

That must have been a Viper GTS (those were the leading GTS-GT2 cars back then; now it's a Porsche vs. Ferrari affair there).

[Psilodel3030]

Firstly this is a Porsche 911 GT1, and secondly this isn't Le Mans but Road Atlanta (the championship was called Petit Le Mans at this time though).

[mat2006]

aff le mans the "track assasin"

[erpitu]

isn't porsche 911GT1 ,,, is a porsche GTR3

[sidewalk4004]

I dont think so. But prove me wrong if I am.

[charley5054]

This IS a GT1

[sigsauer12]

Is GT1

[Andreasu]

Once again it is a Porsche 911 GT1-98

[Spyker88]

Very wrong, erpitu. There is no such car as a Porsche GTR3 and if you reffering to the GT2 class 911 GT3 RS, Thats not it. This is the Porsche 911 GT1, a Prototype.

[deggis4]

or literally Porsche 996 GT1 EVO 98.

[frankowoodsracing]

he nearly landed it! what a move that could have been lol

[masteroftuning]

Whoa! This Porsche is a JUNK for jumpin' like THIS!

[vikirad]

If the 911 GT1 is junk, then what can the Mercedes CLR-LMGTP be called? That flipped at Le Mans 3 times in 3 different sessions of the 1999 race (the last time was during the race, live, on camera, seen by millions)

[Spyker88]

I guess you would say the same for the BMW V12 LMR since it also flipeed at this exact same spot doing the same thing.

[SnowAlpineBunny]

ROFLMAO

[TGTAP]

LOL really strange the way he slams the rear of the car down yet the front bonnet still manages to come off! ROFL