rec.autos.simulators

GPL-Apologies and C.G. question

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GPL-Apologies and C.G. question

by < » Mon, 20 Apr 1998 04:00:00

After my initial post on GPL - opposite lock, i realised I had not
identified myself by mistake. I must therefore apologise to all the readers

.

I would like to introduce another question: the one thing that,
subjectively, might be wrong with the physics model in the demo is that the
Center of Gravity of the cars seems to be too far back. These cars were
light, and the engines were on a central position, quite a bit ahead of the
rear axle. I would expect the C.G. to be very close to the drivers back,
but it seems to be a bit further back. Since we know the wheelbase, we just
need to know the static weight distribution to figure out the longitudinal
position of the C.G.

If anyone has any information on this, I would very much like to know about
it. Thanks in advance.

Once again, I apologise for any mistakes, and thanks to those who replied to
my initial post.
BTW, it was my first-ever post on any newsgroup, but Im learning.

Daniel Fris

Grant Reev

GPL-Apologies and C.G. question

by Grant Reev » Mon, 20 Apr 1998 04:00:00

Hi Daniel:)


> I would like to introduce another question: the one thing that,
> subjectively, might be wrong with the physics model in the demo is that the
> Center of Gravity of the cars seems to be too far back. These cars were
> light, and the engines were on a central position, quite a bit ahead of the
> rear axle. I would expect the C.G. to be very close to the drivers back,
> but it seems to be a bit further back. Since we know the wheelbase, we just
> need to know the static weight distribution to figure out the longitudinal
> position of the C.G.

I don't any real details myself, but I'd expect the CG to be
just behind the driver too. I've noticed the drivers sit a little
further back in the car than they seem to in today's F1 cars, so
I guess that pushes back the CG a little too. And i've noticed the
cars' are set up to have a lot of understeer when we apply even
a bit of acceleration, let alone nailing it. This is great for
allowing us to control these beasts under full acceleration, but
it makes a car hell twitchy under braking and corner turn-in when you
comfigure the dampers to give this understeer-while-accelerating
effect, so I suppose this muchly amplifies the rear CG effect, as
my panel beater in GPL can testify too :) Also the other drivers
get pissed off when i keep smashing the fence, all the sheep get
in on the track, and the race becomes a high speed obsticale
avoidance race.

it was a very impressive first post:)

Grant.


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