How do pedals / wheels work?

How are pedals/wheels systems actually configured e.g. the TM Grand Prix 1 and Thrustmaster T2. I am interested because I want to know if I can use left foot braking on the system i.e. that is keep my foot flat on the accelerator, but then just apply a bit of pressure with the brake pedal at-the-same-time, as opposed to the effect of coming off the throttle, this seems to work in IndyCar II using the keyboard but can a similar effect be gained using pedals, wheels. i.e. How and what axis to the pedals, wheels, use is it one joystick or do they use both A and B? Thanks MarkH

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> If the pedals are both wired to the same axis (the usual case), then > applying the brake is (electrically) the same as letting off the > throttle. If the brake and throttle are on separate axes, then it is > up to the game software what happens. > In Papyrus sims released to date, applying the brakes at all overrides > the throttle input, causing something which is not what you describe > you want... > ---Jim

So let me get this stright. If I'm running at Pocono and I have the Throttle all the way down heading into turn 1 I don't have to lift the foot off? I can just press on the brake and it overrides the throttle? So in a race, I can leave my foot on the throttle the whole time?

Quoted text (10 lines)

>How are pedals/wheels systems actually configured e.g. the TM Grand Prix >1 and Thrustmaster T2. I am interested because I want to know if I can >use left foot braking on the system i.e. that is keep my foot flat on >the accelerator, but then just apply a bit of pressure with the brake >pedal at-the-same-time, as opposed to the effect of coming off the >throttle, this seems to work in IndyCar II using the keyboard but can a >similar effect be gained using pedals, wheels. >i.e. How and what axis to the pedals, wheels, use is it one joystick or >do they use both A and B?

If the pedals are both wired to the same axis (the usual case), then applying the brake is (electrically) the same as letting off the throttle. If the brake and throttle are on separate axes, then it is up to the game software what happens. In Papyrus sims released to date, applying the brakes at all overrides the throttle input, causing something which is not what you describe you want... ---Jim

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>> If the pedals are both wired to the same axis (the usual case), then >> applying the brake is (electrically) the same as letting off the >> throttle. If the brake and throttle are on separate axes, then it is >> up to the game software what happens. >> In Papyrus sims released to date, applying the brakes at all overrides >> the throttle input, causing something which is not what you describe >> you want... >> ---Jim >So let me get this stright. If I'm running at Pocono and I have the >Throttle all the way down heading into turn 1 I don't have to lift the >foot off? I can just press on the brake and it overrides the throttle? >So in a race, I can leave my foot on the throttle the whole time?

No. I wasn't clear. In pedal sets with gas and brake wired together, the computer can only read one value. (Think of it as Value = Throttle - Brakes.) If you keep your foot on the throttle, and press the brakes 10%, the computer will read (in percentages for simplicity:) Value = 100% - 10% (+ 90% or 90% throttle, 0% brakes) If you get off the throttle and 50% on the brakes, you'll get: Value = 0% - 50% (-50% or 0% throttle, 50% brakes) If you have 30% throttle and 50% brakes, the computer sees -20%, which is 0% throttle, 20% brakes. In the case of split axes (gas and brake not electrically connected), the game reads the true value for brakes and throttle, and uses logic similar to: /* Account for noise in brake value reading */ If (brakes > 5%) { throttle = 0% Maybe that's clearer. Sorry for the earlier confusion. ---Jim