Oh ok well sorry I just thought I previously read here that the roll center of a bike or a car on two wheels was right under the contact patch. I must have deeply misread.
End of the offtopic.
This is becoming offtopic but anyway.
Whatever point you are describing is not a roll center. Well it is...right until the moment the car starts to...roll. Kinda ironic. There are two definitions of a roll center. None of them is a point around which a moving vehicle's body rolls.
http://www.neohio-scca.org/com ... ehicle%20Dynamics2007.pdf
“Roll Center” is the most misunderstood term in vehicle dynamics.
Myth #4 - The Chassis Rolls about the Roll Axis
The chassis moves in reaction to a lateral force: it does not roll about a point or axis. The movement includes chassis roll as well as vertical movement. The kinematic roll center concept clearly describes the roll yet neglects jacking force, which might be small for symmetric cases where both tires contribute equal lateral force. But for racing cars the majority of the lateral force comes from the outside tire. In some applications the inside tire may even be off the ground.
Dixon writes “ … many authors introduce the roll-axis as an axis about which the vehicle actually rolls during cornering, the roll axis being the line joining the front and rear roll-centres. When a vehicle is actually moving on a road, the concept of a kinematic roll axis is difficult to justify in a precise way, especially for large lateral accelerations. Therefore the idea of the vehicle rolling about such an axis, although useful as a qualitative idea, should be treated rather cautiously, except in the special case of a stationary vehicle subject to loads in the laboratory.”
Whatever point you are describing is not a roll center. Well it is...right until the moment the car starts to...roll. Kinda ironic. There are two definitions of a roll center. None of them is a point around which a moving vehicle's body rolls.
http://www.neohio-scca.org/com ... ehicle%20Dynamics2007.pdf
“Roll Center” is the most misunderstood term in vehicle dynamics.
Myth #4 - The Chassis Rolls about the Roll Axis
The chassis moves in reaction to a lateral force: it does not roll about a point or axis. The movement includes chassis roll as well as vertical movement. The kinematic roll center concept clearly describes the roll yet neglects jacking force, which might be small for symmetric cases where both tires contribute equal lateral force. But for racing cars the majority of the lateral force comes from the outside tire. In some applications the inside tire may even be off the ground.
Dixon writes “ … many authors introduce the roll-axis as an axis about which the vehicle actually rolls during cornering, the roll axis being the line joining the front and rear roll-centres. When a vehicle is actually moving on a road, the concept of a kinematic roll axis is difficult to justify in a precise way, especially for large lateral accelerations. Therefore the idea of the vehicle rolling about such an axis, although useful as a qualitative idea, should be treated rather cautiously, except in the special case of a stationary vehicle subject to loads in the laboratory.”
You are right. The only way to get load transferred to the inside is having the CoG below road surface.
What Bob is saying is that you could make a normal car "lean" into a corner. But that's just body roll. Load transfer is still going to the outside wheel no matter what.
Even If that would be possible you still do not want "negative" weight transfer to go fast. You want zero weight transfer. That's done by having either the CoG at road surface or infinite track/wheelbase.
mopar, roll center is not the point or axis around which a vehicle rotates. I'm pretty sure a two-wheeled sprung vehicle has front & rear roll centers at a certain height and that they only affect squat/dive behavior. Not lateral forces. Leaning to the inside has the same effect in a car & an unsprung go-kart. The effect is just magnified by the relative weight & movement of the person vs the weight & track of the vehicle.
The call is defendable. The graining was bad for everyone at that time. Who could've figured out the tires would come back to life 2-3 laps later if they hadn't stopped? Lewis & Vettel could afford those 2 laps to see how the tires would evolve but Ferrari didn't have that luxury.
Damn that Renault has MASSIVE traction out of slow corners and one of the best F-duct out there it seems.
Well done Vettel, well deserved
. The kid is amazing.If I'm Alonso and I'm 3rd behind the two untouchable Bulls and Vettel leading there's no way I'm staying there till the end.
With 5 laps to go I drop to 5th while staying right up the diffuser of the 4th.
I wait for Vettel to cross the line 1st and then pull the overtake in the last half of the last lap.
No?
With 5 laps to go I drop to 5th while staying right up the diffuser of the 4th.
I wait for Vettel to cross the line 1st and then pull the overtake in the last half of the last lap.
No?
Rosberg was the last car on the lead lap. He could've pitted at each SC lap and still would've kept his position...that's pretty easy to understand.
Of course the people that were just about to be lapped(Schumi) gained a lot and the people that were just lapped(Hulk) got screwed.
Couple years ago there was a "Lapped cars may now overtake" procedure during SC. Dunno why it was removed.
I'm pretty sure I heard that Vettel said he would do the right thing for the team if he ever was in the position to give Mark the championship. It'll all come down to a brilliantly rehearsed "we need you to save fuel" procedure. The crowd will never see it was team orders. Only Massa/Ferrari are poor comedians enough to f**k this up.
Calm down. FR wheel was 6 inches in the air ffs.
Lewis should be given 25 pts.
Looks like he's the only racecar driver there is in F1.
Looks like he's the only racecar driver there is in F1.
Pretty sure he pumps the brakes to pressurize the little amount of air/vapor there is in the system.
He gets a firmer & more precise feel for the upcoming braking zone.
He gets a firmer & more precise feel for the upcoming braking zone.
Taken somewhere else
Apparently they have been quietly running some "test" groups of local touring type cars to get an understanding of issues with their track preparations. The groups that have used the track so far have reported that tyre deterioration is "incredibly severe".... one car apparently made 3 laps before shredding fronts on a less than 1200kg touring car.
Bridgestone is bringing the hard and the soft compounds iirc.
Apparently they have been quietly running some "test" groups of local touring type cars to get an understanding of issues with their track preparations. The groups that have used the track so far have reported that tyre deterioration is "incredibly severe".... one car apparently made 3 laps before shredding fronts on a less than 1200kg touring car.
Bridgestone is bringing the hard and the soft compounds iirc.
Everyone will probably go pull rod next year with the ban of the DDD. If they don't go with they will at least have a much deeper look at it before choosing push rod design.
Looks like Red Bull should Q 1-2 again but good luck staying ahead at the start.
Then good luck passing them Ferraris and/or McLarens back.
Then good luck passing them Ferraris and/or McLarens back.
I wouldn't say its a new way. If it is non linear flexing and they master it then they just moved the big deflection point past the new load test. What they acheived with load #1 they can easily do it with load #2. As long as the load test forces are less than the forces present on the track they can do it over and over again IMO.
- Can it turn ?
- No.
- Then it's not a car anymore mate.
Awesome work in there.... But drag racing doesn't cut it for me. Sorry.
- No.
- Then it's not a car anymore mate.
Awesome work in there.... But drag racing doesn't cut it for me. Sorry.
From Sept 1st on The Guardian.
http://www.guardian.co.uk/envi ... 01/franny-armstrong-10-10
She seems pretty.....balanced. I now have a slightly better understanding on how this video made it.
Lots of good stuff...
Hahahaha that is EXACTLY what I thought while watching it. But then the end came and I realized it was...well... what it is. Then my brain had a really hard time processing this. Just like Sam it looks like. Loss of words. I simply couldn't understand...at all. That really is a weird feeling.
Wow. I.... wow.
Sony & Kyocera are now pulling out of 10:10.
How this could end up being published is beyond me. How can you not see how wrong your own message is? The apology is even worse. It is a "sorry it didn't help the cause" apology. A "sorry they didn't get it" apology. That's scary.
I honestly think that to be that far off on both the vid & apologies you need to be slightly disconnected from reality. The ones who have approved this are so deep in their cause that they have lost touch with the world they live in. They have lost touch with the "normal" people around them. The same people that they're actually trying to convince...how sad.
I'm glad most of the green community also saw how wrong this was. 'sigh of relief'. Let's move on.
Seen this ? Wow.
http://adamcooperf1.com/2010/0 ... r-as-tyre-holds-together/
The tyre made it through the 26 laps after the clash despite being ‘unseated’ from the rim. Webber felt a vibration and actually ended the race with a blister on his hand. The team’s telemetry did not show a loss of pressure, but there was an unusual indication that the volume of the air in the tyre had changed. The tyre finally lost its air as the car sat in parc ferme.
http://adamcooperf1.com/2010/0 ... r-as-tyre-holds-together/
The tyre made it through the 26 laps after the clash despite being ‘unseated’ from the rim. Webber felt a vibration and actually ended the race with a blister on his hand. The team’s telemetry did not show a loss of pressure, but there was an unusual indication that the volume of the air in the tyre had changed. The tyre finally lost its air as the car sat in parc ferme.
That's way too deep ?? His LR still on the inside curb when they make contact.
Last edited by PhilS13, .
Watching other people using a PC
The getting-in-sideways-is-faster-than-properly-turning-in problem also exists in nKpro it seems.
Otherwise its pretty decent imo.
Otherwise its pretty decent imo.
Weak comparison. Come on. Completely deliberate maneuver vs driving mistake. He could've at least compared Raikkonen at Monaco vs Vettel.
I would've thought Brundle thinks before saying retarded shit.
Anyway since when they penalise someone for losing control of his car ? When you start penalising the result rather than the actions you open the door to inconsistencies.
Well that's something that happens even without a flexible wing. There is always a transition from understeer back to normal balance at the moment you get out of someone's tow but all the drivers are well aware of that. I'm guessing with the RB6 this effect is not only amplified, it is also delayed. You probably feel the initial oversteer and then...some more when the wing has reached his low position.
It's up to Vettel to drive accordingly and avoid putting his car in such situations but he looks not mature enough to do that.
W O W
Seriously that's dangerous. Now I wonder about Webber in Valencia ?? Front wing could have f***ed him up too when he was right behind Kovalainen.
FGED GREDG RDFGDR GSFDG