rec.autos.simulators

Mitch

Who said slicks don't squeal?

John

I agree with whomever said that. Slicks squeal usually at two times, when
they begin to lose traction and in the case of a burnout in any drag racing
series (IHRA/NHRA et al) they also squeal the second they stop spinning from
their burnout to heat them up, right as they catch traction.

Usually the noise made by a slick at or near its "limit" is more of a rub or
grinding sound in my experience.

NOW, ALL THAT SAID, if the original poster was talking about Busch Q for the
upcoming event at Richmond, then yes, those tires WILL squeal when they slip
from traction this week, there's brand new pavement and more importantly,
squeal friendly sealer down up there this week. So not only will you hear
squealing from the tires this week as they spin out, but that lovely putrid
yellow smoke should make its return as well.

  At the same time, it was about before losing it.  Of course, at the track,
you would have heard the noise before it lost it too, along with every other
car.

Todd Wasson
Racing Software
http://PerformanceSimulations.com
http://performancesimulations.com/scnshot4.htm

A slick tyre does NOT squeal under NORMAL HARD CORNERING,
even at excessive slip-angles BUT .. DOES if a) Locked up or b)
if WHEEL-SPINNING excessivly or c) Totally  out of control and
sliding SIDEWAYS EXCESSIVELY.

You do get a "very" faint SQUAL (a bit like rubbing your finger
over leather) at hi slip angles (but still not out of control) but
only really when cold. Spectators can'tr hear it and you can't
really hear it in your helmet or if loud engine noise

It's the movement of the tyres tread that causes the distinctive
tyre squeal you get in say GPL. Some road tyres will squeal at
very low slip-angles.

Maxx

Then the argument changed, as usually I'm tempted to say, as the
discussion went on. Like the discussion about braking and being on the
throttle at the same time, where loads of people said you couldn't do it
for various reasons (because it ruined the brakes or whatever), then
Schumacher's telemetry proved that he does it all the time and all of a
sudden everybody had always exclusively claimed that you couldn't have
done it in GPL cars - or something like that <g>

Anyway, we need exaggerated and premature tire squeal in sims, no matter
whether the real tires do it, simply to make up some for the seat of
pants feeling we don't have in sims.

Achim

From what I understand, Simbin has said that the tire sounds are a bug
in the demo and will be normal (i.e. like GTR 2002) in the final
release.

And uh, has anyone come up with a logical reason why slicks wouldn't
make scrubbing sounds before you've gone  past the limit but grooved
tires do (as I'd assume anyone who has driven a street car would
know)?   The in-car trans am stuff I've seen definitely has audible
tire sounds when the driver is nearing the limit of traction.

Jason

Maxx!  Welcome back!  Glad to hear from you again.

Eldred
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I have also ran slicks and found that the racing surface also will change
the usual "growl" sound when cornering hard to more of a squeal. I ran an
RX-4 back in the '70s in SCCA racing and regularly shod it with slicks. It
literally pushed like a dump-truck with the stock suspension and I had very
loud squealing with that sucker on any hard turn slicks or not. Today, with
the advent of racing radials, they do not tend to make as much noise until
they break loose. With the old belted slicks, sometimes you hated to NOT
hear something because that usually meant that you were down to the
belts....:-). I guess what I am saying is that there are too many variables
to say they squeal or don't squeal........:-). The car, track surface and
even the brand and composition of the tire make a difference. All the tall,
narrow tires that we ran in SCCA back in the 1960s were extremely noisy.

Ed

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Achim