Something prompted by a recent aha moment is very important and I think rarely mentioned, which is directing the driving line by using front suspension bounce.
Lately I've been considering this with some interest and today thought maybe I'd go back and look at the Ring screenshot, ("Apex_Aremberg"), in the above post #40 to freshen my memory about zero divided by infinity, to find out what was it I was thinking back then, and noted it had been downloaded like 40+ times.
Gee, not much downloading after 1,500 thread views. (Maybe Burnsy865 is right).
Anyway, turns out I already had an idea about the critical need to drive a car using spring bounce to place it on a certain and specific point at the exit of a turn and included a note about it as an aside.
Here's the technique, in case any of the 40 or so who are interested care to try it. (I know its all fantasy/guess, but its what I think I'm doing).
(As in Apex_Aremberg, assume you = zero on the y-axis):
Coming up to a turn, pick a point where you want to be at exit…this is not a special point until you think it is, it can be anywhere on the track depending on circumstance, but typically except in pursuit it is near the centerline of the track, In the screenshot, this point is called "infinity."
Once determined, quickly flick the wheel in the opposite direction. If intending to turn right, flick the wheel left to a point symmetrically opposite the exit point, (or close enough, to get the springs bouncing away from the exit).
Then, as the springs bounce back and are then directing the bounce toward the exit point, flick the wheel quickly to the exit point, typically inside the apex of the driving line, and at the same time tap the brake quick but firm, once. (ONCE!).
The springs will then compress toward the exit point with substantial emphasis and if not interrupted will bounce in that direction until they bounce back, away from the point where you want to be. That is not what you want happening at all, right?
So to keep it happening, trail brake into the turn, holding the springs on point, then slowly floor it and hold the wheel on the exit point! Don't turn the wheel away as long as it seems the springs are still bouncing to that point.
Very amazing. It goes right where you point it, (the red line in the screenshot). Better get it right, because it will not go anywhere else without a lot of panic-stricken flailing about, if you are lucky. But throw the front springs there, and the car will go there. You can pick a point way on down the track as well, which works really well at tracks like Silverstone67.
The goal is once per turn or once per change in track direction. If it doesn't go there, steer the car with the brake and accelerating throttle, to re-center the car, and repeat the entire sequence. This causes a second apex, but you get thru the turn, (hopefully). If that doesn't happen, reconsider your line and/or fix your setup.
Start with steering ratio, as that very much effects how the flicking wheel sets up the entire turn, as well as how the car holds the driving line. (If I import a setup, the first thing I do is tweak the steering to sync the setup to my race console as close as possible, and not change anything else). After that, work on the diff, etc...
Edited by John Woods, Feb 06 2011 - 06:16 PM.