rec.autos.simulators

GPL and realism

Harjan Bran

GPL and realism

by Harjan Bran » Wed, 19 Apr 2000 04:00:00

I'll give it a try, in a racing car you go down the box under braking (so
from 5 to 2 is 5-4-3-2). While you brake and go from 5-4 (and from 4-3 and
3-2) you're gearbox will be turning faster than your engine revs (when you
brake the revs go down because you don't give any throttle), with a non
syncro meshed gearbox it will be very hard to get the gear cogs to get into
each other. Furthermore you'll have excessive engine braking which isn't
good for the balance (this is an important reason for road users to use heel
and toeing).
So while braking with one part of your foot you apply quite some throttle
with the other to keep the revs up.

A nice way in a road car to try it at a slow speed is to brake and shift to
first gear at about 20k, without heel and toeing the shift will be very hard
(don't push through it) with some nice heel and toeing it will work just
fine.
In order to know the revs you won't to make just check the revs you're doing
in first gear at 20k, you'll need just a very bit more in order to make a
supersmooth downshift.



> > Explain me, you drive an automatic car so left foot braking feels
unnatural?
> > I think left foot braking is far easier in an automatic than in a manual
> > shifter.
> > With a manual gearbox you constantly have to decide whether not you'll
be
> > left braking, with an automatic box you can do it all the time and
there's
> > no need for heel and toeing. For me it;s the only pro about an
automatic.

> I read a lot of "heel and toeing", even think I see it happening in "Grand
> Prix" (the frankenheimer movie) too but I don't really understand it.
Could
> somebody of you goeroes explain what this heel-and-toeing technique really
is
> and what it's advantage over "normal" driving is?

> --
> Jan Hovius

Alan Orto

GPL and realism

by Alan Orto » Wed, 19 Apr 2000 04:00:00

Your right you would have to have a realistic shifter like the Act Labs,
even maybe in the future a FF shifter where it may not go into gear or
even pop out on it's own during certain events. About the Brakes,
couldn't you use a hydraulic system from a bicycle and just let the
caliper squeeze against a piece of steel. You could disconnect the pedal
from the hydraulic system to calibrate the pots though. What I would
like to see is a reduction gear attached to the pot on my wheel so I
could turn the wheel a full revolution or even 2 full turns like a real
car. I just want it as close to real life as possible. It would be great
practice for real life at a much lower cost then renting a track or
burning gas all day.

> Not an option until we can buy a set of pedals, including a clutch, with a
> pressure (as opposed to travel) sensitive brake and correctly positioned
> pedals for less than $100, IMO. Probably would need support for a "true"
> shifter as well (think Act Labs has one)... would be hard to time the blip
> if you're not moving the gear lever by hand methinks.

> I think right foot brake with auto clutch and blip works very well. Can't
> get used to left foot braking anyway, but if the hardware were available
> "off the shelf" I'd certainly give it a go.

> Jan.
> =---


> > Us GPL fans are all very proud of our hunger for realism but yet almost
> all
> > of us use one very big cheat when driving the car. <Snip>

Jan Verschuere

GPL and realism

by Jan Verschuere » Wed, 19 Apr 2000 04:00:00


That would be absolutely amazing.

No, in that case you're still travel sensitive (pot). I'd like to see a
system using some sort  of pressure transducer which translates the amount
of force I excert on the pedal to a reading for the game. I.e. where I don't
have to move my leg to modulate the brakes and can position the pedal in a
way which allows me to blip the throttle without nescessarily letting up on
the brakes (as is the case using my Nascar Pro pedals).

Besides, you're talking home build again. Stop it already you guys. I'm an
electronics engineer... mechanical stuff spooks me. ;-)

For sure, not mention the cost of repeatedly leaving the black stuff. ;-)

Jan.
=---
<Snip>

Remco Moe

GPL and realism

by Remco Moe » Wed, 19 Apr 2000 04:00:00



>> Explain me, you drive an automatic car so left foot braking feels unnatural?
>> I think left foot braking is far easier in an automatic than in a manual
>> shifter.
>> With a manual gearbox you constantly have to decide whether not you'll be
>> left braking, with an automatic box you can do it all the time and there's
>> no need for heel and toeing. For me it;s the only pro about an automatic.

>I read a lot of "heel and toeing", even think I see it happening in "Grand
>Prix" (the frankenheimer movie) too but I don't really understand it. Could
>somebody of you goeroes explain what this heel-and-toeing technique really is
>and what it's advantage over "normal" driving is?

In a non-synchronized gearbox you need to "blip" the throttle so
the gears have the same speed before you change the gear. If you
don't, you hear a scary noise.... <g> This is mostly done while
downshifting, and that's something you do when you're braking.

So, you need to press the brake, throttle and clutch at the same time,
but you only have 2 feet. In this case you use the left foot for
clutching, the right foot toe for braking, and the right foot heel for
the throttle.

Remco

David R. Ericso

GPL and realism

by David R. Ericso » Wed, 19 Apr 2000 04:00:00

Yes... Pittsburgh, PA to be a bit more precise.  I figured that's what my knees
are for.  It's an art form.  Big Mac in mouth, map on lap, left hand on wheel,
shift with right hand and left foot, map back in left hand, Big Mac in right
hand, left knee controls steering wheel, right foot on gas... throw in
Super-sized fries and Sprite and it starts to get even more interesting...
works beautifully for me!  :-)

I just don't feel like I'm "driving" with an automatic.  We have a 2000 Honda
Odyssey mini-van for the family that's an automatic, but for my beater car
going back and forth to work I couldn't live without my 1990 Toyota Camry V6
5-speed!

Being that I never left foot brake in my car (er... I need that for the
clutch), it took me a little while to get use to left foot braking in sim
racing.  Now it's natural for me to left foot brake in racing sims.  However,
when I try it in the mini-van I've found the pressure and sensitivity to be
quite different.  Needless to say, the family finds it a bit painful too!  

Dave Ericson
MomoBoy online
JDB Racing


> Ever drive over here in north america?  Ever try readin a map, eatin a
> big mac and shiftin at the same time!!! +)

> Its called the grid system, on the highway they are straight and booring
> in most areas.

> Personally i prefer a stick, but hey no car at the moment, and the GPZ
> needs a few too many $$ ....

> Md



> > >  Plus any competant instructor should rap the knuckles of anyone using
> > >the left foot to brake with an Automatic.  If you are like most of us
> > >lazy Americans, you will rest your left foot on the brake pedal...What
> > >does this do?  Wears out your brake pads and confuses the Hell out of
> > >anyone following you in traffic.
> > >dave henrie

> > what is the obsession of the US of using auto gears in cars. i'm not
> > getting at the US too much here i just want to know why anyone would
> > possibly prefer one over driving a car with a manual gearbox.

> > the only time we use autos in europe is in dodgem cars isn't it ??

> > Rich

Alpha Omeg

GPL and realism

by Alpha Omeg » Wed, 19 Apr 2000 04:00:00



I'm not sure about the rest of the world, but over here (UK) you're
not allowed to use your left foot at all when taking your test in an
automatic vehicle. Right foot only. You must have been tested in a
manual car, but drive an automatic when it suits you right? Ever
actually been tested in an automatic?

I tried using my left foot to brake earlier on today. It was a
horrible feeling. There isn't even enough room for both my legs to sit
together to control both the pedals.

Of course, the best thing about using your right foot for the pedals
is that it leaves your left foot free to tab to music on the stereo.
:-)

Alpha Omega

ICQ: 70300233

Alpha Omeg

GPL and realism

by Alpha Omeg » Wed, 19 Apr 2000 04:00:00

On Mon, 17 Apr 2000 22:28:46 +0200, Rich


>what is the obsession of the US of using auto gears in cars. i'm not
>getting at the US too much here i just want to know why anyone would
>possibly prefer one over driving a car with a manual gearbox.

>the only time we use autos in europe is in dodgem cars isn't it ??

I'm the complete opposite. I can't understand why anybody would choose
to drive a manual car when you have the option to drive an automatic.

Why put yourself through the extra hassle of shifting gears and
popping the clutch? You don't gain much out of it.

Alpha Omega

ICQ: 70300233

Alpha Omeg

GPL and realism

by Alpha Omeg » Wed, 19 Apr 2000 04:00:00



There must be a reason why left foot breaking is not allowed by the
highway code in an automatic car in this country. Otherwise, wouldn't
they leave it up to the driver to decide which foot he uses?

Alpha Omega

ICQ: 70300233

Dave Henri

GPL and realism

by Dave Henri » Wed, 19 Apr 2000 04:00:00

  Gimme a stick anyday.  My son learned to drive an auto in school and
he had a hell of a time learning to drive a clutch stick combo.  But he
finally got it figured out.  This is one Yank who would never buy an
automatic....
  Ever try to stop at an icy/snow-covered intersection on a cold morning
when the auto***has the engine rpms sky high and the back wheels
spinning even with the brakes applied?
dave henrie

> On Mon, 17 Apr 2000 22:28:46 +0200, Rich

> >what is the obsession of the US of using auto gears in cars. i'm not
> >getting at the US too much here i just want to know why anyone would
> >possibly prefer one over driving a car with a manual gearbox.

> >the only time we use autos in europe is in dodgem cars isn't it ??

> I'm the complete opposite. I can't understand why anybody would choose
> to drive a manual car when you have the option to drive an automatic.

> Why put yourself through the extra hassle of shifting gears and
> popping the clutch? You don't gain much out of it.

> Alpha Omega

> ICQ: 70300233

Stephen Ferguso

GPL and realism

by Stephen Ferguso » Wed, 19 Apr 2000 04:00:00


Uh... first thing you learn in a decent driving school in Canada (if you are
learning on an automatic) is how to slap it into neutral without a second
thought.  It was a natural reaction in the winter.  Of course, I would never
volutarily go back to an automatic, but they're not soooo bad.

Stephen

kevinga

GPL and realism

by kevinga » Wed, 19 Apr 2000 04:00:00


Nonesense. Any competant instructor should rap the knuckles of anyone
resting their left foot on the brake pedal, or clutch in a manual.

The only competant argument for not left foot braking an auto is that a
driver might get confused when switching back and forth from a manual.

Left foot braking is perfectly ok with either form of ***.

I left foot brake and clutchless shift my manual street car all the time. I
NEVER use my right foot on the brake in an automatic.

I use the deadpedal for my resting left foot. That's what it's there for.

kevinga

GPL and realism

by kevinga » Wed, 19 Apr 2000 04:00:00


With the clutch materials used at the time the clutch was the most likely
part of the drivetrain to fail, every use shortened its life and entailed
the risk of burning it our completely. The drivers, for the most part,
avoided it's use during a race, saving it only for when it was really
neccessary.  This is still true today in many large Sedan classes, such as
Trans Am. Shifting clutchless is perfectly realistic. I do it in my street
Honda CRX all the time.

I might quote from Carrol Smith's Drive to Win:

"After you get good at shifting the Non-sycncro racing car you may notice
that your are not depressing the clutch all the way. The truth of the matter
is that most racing drivers don't - they just sort of jab at it with the
left foot. It is therefore a relatively small step for the "skilled" driver
to stop using the clutch at all........... The question of clutch use is a
matter of personal preference and confidence. My  opinion is that if the
driver is skilled enough and confident enought to learn how to do it well,
he (or she) will have a performance advantage- at least in short races."

Among modern drivers there are those who disagree, with *modern* cars. Danny
Sullivan uses the clutch, but says we's never double clutched in his life.
Bryan Herta always uses the clutch and double clutches, everytime. But Bryan
dosn't drive cars where the clutch is the weak link.

Left foot braking is another realism story, the only problem being the
steering shaft passing directly through the drivers feet made it difficult
to move the left foot over to the brake pedal. There WERE cars and drivers
who put the brake pedal on the left and the clutch in the middle however.
Pre war this was even common.

??artij

GPL and realism

by ??artij » Wed, 19 Apr 2000 04:00:00

You WHAT??? You shift in a manual transmission car without using the
clutch?
I bet you only drive rental cars

Mart

GPL and realism

by Mart » Wed, 19 Apr 2000 04:00:00

....because it's called driving, unless you're in a traffic jam.

Marty


> Why put yourself through the extra hassle of shifting gears and
> popping the clutch? You don't gain much out of it.

Mart

GPL and realism

by Mart » Wed, 19 Apr 2000 04:00:00

What country is that?

And how would anyone know what foot you are using to brake?

Marty


> There must be a reason why left foot breaking is not allowed by the
> highway code in an automatic car in this country. Otherwise, wouldn't
> they leave it up to the driver to decide which foot he uses?


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