rec.autos.simulators

N4 Major Physics Problem or ?????

Ruud van Ga

N4 Major Physics Problem or ?????

by Ruud van Ga » Sun, 11 Feb 2001 01:14:26



But ofcourse easier to tell whether it is *going* into a slide,
because of the same inertia.

BTW, the width of the tires don't matter much in friction, if at all.

Ruud van Gaal, GPL Rank +53.25
Pencil art    : http://www.racesimcentral.net/
Car simulation: http://www.racesimcentral.net/

Mike Donnelly J

N4 Major Physics Problem or ?????

by Mike Donnelly J » Sun, 11 Feb 2001 13:06:29




> >no they dont weigh over 2 tons. If you dont think they can be corrected
> >in real life racing, you have not watched the career of Dale Earnhardt

> Sorry, in France, Nascar is not very popular, and the last time i saw
> nascar on Eurosport they say that they weighed 1.8t, Engine was 6L , 4
> cylinders, and about 400bhp ... I will be pleased to know the new values !
> And i don't say that you can't correct it but it is very more difficult than
> a 1967 F1 car because of the weight. So it's a compliment for Nascar
> drivers, even if IMO F1 pilots are better drivers ... but anyway we can't
> compare those two style of driving.

Sebastian, 1.7 - 1.8 tons is close - technically the car itself is 3400 pounds +
200 pounds (minimum) for the driver; 700+ hp (I think I read once where Robert
Yates's crew got 742 peak on one engine), I'm going to guess that 6L is correct
as I don't know what the volume conversion is.  Anyhow it's measured as a 358
cubic inch volume.

The 700+ bhp is generated by a V-8 engine (2 or 4 valves anyone?) with a 830
4-barrell carburator.

The tires used are 9.5 inches wide when inflated to 60 psi.  Once you change the
pressure you change the contact patch and at that point it's part science and
part art - and why crew chiefs get paid the big bucks.

As to better drivers, I tend to liken it to runners.  Enduro drivers are similar
to tri-athletes; drag racers are the sprinters, short track drivers are similar
to intermediate distance runners and the big boys of stock cars are rather like
marathoners.  Road racing is rather like cross country.  I will say that it's
much easier for a driver to alter his style than a track runner.

Woodie

N4 Major Physics Problem or ?????

by Woodie » Sun, 11 Feb 2001 22:30:50



>Sorry, in France, Nascar is not very popular, and the last time i saw
>nascar on Eurosport they say that they weighed 1.8t, Engine was 6L , 4
>cylinders, and about 400bhp ... I will be pleased to know the new values !

Roughly 1.7 tons, 5.6 liters, 8 cylinders, and 700 hp.  These are not new
values.  They dropped 100 pounds a couple of years ago, and horsepower always
creeps up, but the formula has been stable for about 20 years.  Did they really
say 6 liter 4 cyl?

Don McCorkle

Tony Whitle

N4 Major Physics Problem or ?????

by Tony Whitle » Mon, 12 Feb 2001 03:40:48


Never having driven either, I should imagine that the (much) heavier car
would be easier to catch as everything would happen much slower. Certainly
true of road cars I have driven, but there may be other factors involved
there.

Well I'm a developer and game for anything too ;-)

--
Tony Whitley
GPLRank +10.65

Sébastien Tixi

N4 Major Physics Problem or ?????

by Sébastien Tixi » Tue, 13 Feb 2001 16:09:30


Hi,

Well, They said 6liters, but 4 cylinders, maybe i didn't remember correctly
:o)
Maybe they said rounded numbers for the TV audiance.( 2tons, 6liters ).

regards,
--
Seb
Game Developer
GPLRank -41.68
http://magicfr.multimania.com

Sébastien Tixi

N4 Major Physics Problem or ?????

by Sébastien Tixi » Tue, 13 Feb 2001 16:19:16



1 inch = 2.54cm, so 358 cubuc inches = 5866 cubic cm, equal 5.866 liters.

Thanks, for those thechnicals infos ! ... jezzz... 9.5 inches ... front
and rear tires ??? My car has 9.5 inches ( 25cm ) tires and don't has
700 bhp !

regards,
--
Seb
Game Developer
GPLRank -41.68
http://magicfr.multimania.com


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