Rob Wilson - driver coach?

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Nando
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Re: Rob Wilson - driver coach?

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very interesting there about Kimi and Lewis. I think we all knew to some extent they were extremely good drivers but could anyone elaborate on what he means here?
"I think that Lewis by one circle of the fastest driver in the world today, though in recent times, as the older, shows that he is able to connect a lot of those rounds into a whole. Kimi is definitely the fastest race car driver in the world today."
First sentence, if anyone could break it down for me that would be great.
What does he mean "by one circle" then say Kimi is the fastest in the world today?

Does he mean in one aspect or what?
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bcoxa
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I took it to mean that lewis is the quickest over one lap, and as he goes on is starting to be able to build that into more laps. Kimi is already there and the quickest over a race distance.
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Nando
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bcoxa wrote:I took it to mean that lewis is the quickest over one lap, and as he goes on is starting to be able to build that into more laps. Kimi is already there and the quickest over a race distance.
Ahh ok now i get the "once circle" thing.. one lap basically. Thanks for clearing it up, gotta learn the Wilson-vocabulary it seems :)
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raymondu999
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The one circle thing isn't the Wilson vocabulary, much as I dislike the Wilson vocabulary. It's Google translate from Croatian! :lol:
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raymondu999
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I just had a sort of eureka moment. This "shorten the corner" business - what if it's true in road cars? A road car generates lift as it goes along - and the slower you're going, the less lift you'll have. Effectively, you have more "downforce" (ie less lift) and thus more grip at lower speeds - and this shortening of corners would mean that you're actually able to rotate the car with more grip in that slower speed - leading Mr. Wilson to say that on average it is quicker to shorten the corner, because the extra speed carried on a wide line isn't enough to make up for the better traction of a V-shaped corner.

Whether or not this translates to an F1 car I think is a bit of a dodgy business - F1 cars have downforce, and obviously the wider line would mean you have more downforce, and grip, to play with - so relative to the road car - the F1 car takes the wider corners much quicker - relatively speaking. Reason being, you're taking a wider corner at increased grip (downforce) while in a road car you're taking a wider corner at decreased grip (lift). I hope I'm not sounding convoluted here. So in theory - it might not be as beneficial in an F1 car.

Any takers?
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timbo
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Re: Rob Wilson - driver coach?

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raymondu999 wrote:Whether or not this translates to an F1 car I think is a bit of a dodgy business - F1 cars have downforce, and obviously the wider line would mean you have more downforce, and grip, to play with - so relative to the road car - the F1 car takes the wider corners much quicker - relatively speaking. Reason being, you're taking a wider corner at increased grip (downforce) while in a road car you're taking a wider corner at decreased grip (lift). I hope I'm not sounding convoluted here. So in theory - it might not be as beneficial in an F1 car.

Any takers?
Well, in low speed corners there's not so much downforce to play into things, so there might be a sense in what he says, but in mid- and definitely high speed corners the car aero attitude plays much bigger role. Exhaust blowing (not as important now as it was last year) certainly disturbs things.
But if you want to spot differences between drivers you have to look at low speed corners, anyway.

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raymondu999
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Yeah I know what you're saying, and I agree. I'm just not entirely sold on his shorten the corner thing yet in slow corners, because I haven't seen any "evidence" this is the case. All I have so far is Rob's words saying "it's faster"
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radosav
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"once circle" means ''one lap'', sorry about translation

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raymondu999
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timbo wrote:Well, in low speed corners there's not so much downforce to play into things, so there might be a sense in what he says, but in mid- and definitely high speed corners the car aero attitude plays much bigger role. Exhaust blowing (not as important now as it was last year) certainly disturbs things.
But if you want to spot differences between drivers you have to look at low speed corners, anyway.
Yep, possibly.

I'd think a car's toe in/out would also have a say in how much tyre scrub there is though.

A little something someone said to me:
Anonymous wrote:However, to keep the dialogue moving, there you go:

Summary: the late apex is precisely the way to "shorten the corner", as you call it. I think Mr. Wilson is saying precisely this. Notice how he talks of "smooth-firm". I couldn't agree more.

Notice three things:

In first place, there is no way to have four tyres flat, except in a few positions around the track (and that depends on the kind of curve that is BEHIND you). That's a certainty.

In second place, no optimal trajectory is symmetrical: most cars decelerate MUCH faster than they accelerate.
That's the reason why late apex is not critical unless you have serious engine power. It's also the reason why rookies can do fairly well with a regular apex trajectory. That's also the reason why most racing cars are heavier in the back.

In third place, there is a huge difference between the way you should take a curve in a circuit with curve transitions and in a circuit which has not curve transitions. I despair of transmitting the knowledge here.
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Pierce89
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raymondu999 wrote:I just had a sort of eureka moment. This "shorten the corner" business - what if it's true in road cars? A road car generates lift as it goes along - and the slower you're going, the less lift you'll have. Effectively, you have more "downforce" (ie less lift) and thus more grip at lower speeds - and this shortening of corners would mean that you're actually able to rotate the car with more grip in that slower speed - leading Mr. Wilson to say that on average it is quicker to shorten the corner, because the extra speed carried on a wide line isn't enough to make up for the better traction of a V-shaped corner.

Whether or not this translates to an F1 car I think is a bit of a dodgy business - F1 cars have downforce, and obviously the wider line would mean you have more downforce, and grip, to play with - so relative to the road car - the F1 car takes the wider corners much quicker - relatively speaking. Reason being, you're taking a wider corner at increased grip (downforce) while in a road car you're taking a wider corner at decreased grip (lift). I hope I'm not sounding convoluted here. So in theory - it might not be as beneficial in an F1 car.

Any takers?
In a slow corner, even in an F1 car, straightening the wheel quicker will help your traction available for longitudinal acceleration more than the downforce of 3Kmh(arbitrary number) more apex speed.
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Pierce89
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Pierce89 wrote:
raymondu999 wrote:I just had a sort of eureka moment. This "shorten the corner" business - what if it's true in road cars? A road car generates lift as it goes along - and the slower you're going, the less lift you'll have. Effectively, you have more "downforce" (ie less lift) and thus more grip at lower speeds - and this shortening of corners would mean that you're actually able to rotate the car with more grip in that slower speed - leading Mr. Wilson to say that on average it is quicker to shorten the corner, because the extra speed carried on a wide line isn't enough to make up for the better traction of a V-shaped corner.

Whether or not this translates to an F1 car I think is a bit of a dodgy business - F1 cars have downforce, and obviously the wider line would mean you have more downforce, and grip, to play with - so relative to the road car - the F1 car takes the wider corners much quicker - relatively speaking. Reason being, you're taking a wider corner at increased grip (downforce) while in a road car you're taking a wider corner at decreased grip (lift). I hope I'm not sounding convoluted here. So in theory - it might not be as beneficial in an F1 car.

Any takers?
In a slow corner, even in an F1 car, straightening the wheel quicker will help your traction available for longitudinal acceleration more than the extra downforce of 3Kmh(arbitrary number) more apex speed.
“To be able to actually make something is awfully nice”
Bruce McLaren on building his first McLaren racecars, 1970

“I've got to be careful what I say, but possibly to probably Juan would have had a bigger go”
Sir Frank Williams after the 2003 Canadian GP, where Ralf hesitated to pass brother M. Schumacher

bill shoe
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Interesting discussion. I learned a lot about road course vehicle dynamics and the fastest line from watching high-end electric RC road course cars. They have all wheel drive, and a single-ratio electric motor with flat torque that is strong enough to spin the tires if desired. As a first approximation they have equal acceleration in any direction-- accel, decel, cornering, combinations, etc. The max accel is strong, I'm guessing 1.5 or 2.0 G. This combination doesn't exist in many real cars and certainly does not exist for a real-size car on a proportional real-size track. So a high-end RC road racer on a proportional RC road course is a unique high-performance situation.

The quickest way around in theory and practice is to always take the inside constant radius around corners and join those together with straight tangents. There is a transient phase beween longitudinal and lateral acceleration, but the RC cars' natural frequencies in roll and pitch are very quick so those transients are barely noticeable. The line I described is the shortest possible line around the track.

In a real car the slower transitions from longitudinal to lateral are necessary due to the slower roll/pitch natural frequencies, not because the ideal track line requires it. Early or late apexes, wide vs tight lines, etc. all come about because the accel G's are not equal to the brake and cornering G's. Gear changes are large non-linearities that require further countermeasures away from the RC ideal. All real-car driving lines and cornering strategies come from the imperfections of the real-car.

bill shoe
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Well crap, apparently I killed all the energy in this thread.

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raymondu999
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Lol! I don't think it was very alive in recent history anyways.

Anyways - great anecdotal evidence bill. Do you have numbers that we could see to actually quantify it?
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raymondu999
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Here is an excerpt off an interview that Maurice Hamilton had with Sir Jackie, which I feel is relevant to the thread:

Maurice - How much can you tell that's happening when you're just looking at the pictures from the on-board cameras?
Sir JYS - Look at the driver's hands on the steering wheel. Some of them are all over the place; everything's an adventure. What you don't need is a challenge; what you really want is an invitation. The Matra MS80 I drove to win the championship in 1969 was an invitation. I gave it time to do everything, and it let me do things I would not have been able to do had I been trying to keep up with a difficult animal. You want to lead a placid animal into a corner. If I overdid it under braking and it became too busy, suddenly I was trying to consume this business just to get the apex. But if everything is calm, on the way in I'd be thinking of the exit – not the apex.

It's sometimes difficult to make a young driver understand this, because he thinks all he's got to do is drive it. When you get into F1, it's a whole new package. Suddenly there's not as much space between the exit of one corner and the entry to the next. You're up through the box and you're working the steering wheel and the buttons. You get to the next corner and you're not prepared. It's about being able to find time and create very subtle improvements that suddenly make the laptimes more consistent.

Most of the current F1 drivers turn in far too fast; you can see it on TV. Vettel turns in microseconds slower, and so does Alonso. It's only microseconds, but that little bit is taking all of the tensions within the car. It's very simple, but there are no coaches to tell them that.
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