Sorry for the long post, but it is all relevant. See my addition at the
bottom.
>>>Okay, let's figure it out:
>>>Let's compare two drivers accelerating out of a 100mph curve on a long
>>>straight, topping out at 200mph, but the slower guy is on the gas 50
>>>meters later.
>>>If both are accelerating the same way (the two acceleration curves are
>>>50 meters apart, no wheelspin, same car and setup) the difference is
>>>that the slow guy is cruising the first 50 meters at the beginning at
>>>100mph (1.125sec), while the fast pilot is speeding 'his' 50 meters at
>>>200mph at the end of the straight. The difference is only 0.56 seconds
>>>which is IMHO not much compared to the 50 meters (or more than 10
>>>lenghts of a car, or 1.125sec) which the slow driver hesitates before
>>>he dares to move his right foot.
>>This is where you're probably mistaken. The two 'accelerating curves'
>>won't stay 50m apart through the acceleration. The distance will
>>grow with time. This comes from the fact that the guy starting
>>to accelerate earlier has a higher speed at any point and time
>>on the straight where he's accelerating than the guy starting
>>50m later. So at the end of the straight your 50m will
>>have grown to, say 70m or a 100m.
>>This is why it always feels difficult to overtake another car when
>>accelerating out from a corner. The other car will always seem to pull
>>impossibly away. The only way to pass a car is by either drafting
>>or leaving enough room before the exit of the turn so that you can
>>get on the gas earlier when coming out. Actually a combination of both
>>would seem to be most effective :) This is why when 'defending' your
>>position it is a good idea to slow down excessivly in a corner so that
>>the car behind you failes to get the needed room he needs to get
>>on the gas earlier. I.e. he's so close to you that he has to
>>wait for you to start accelerating _first_ before he can
>>start accelerating.
>><snip>
>>Regards,
>> Casper
>You make a mistake here I think. The distance between the cars grows, at
the
>same time the speed of the cars increases, as a result the time difference
>remains the same (if they accelerate at the same rate on every point of the
>track).
>The explanation must be that the faster driver has started to accelerate
>earlier. If he did this from a lower cornering speed, it looks like the
>drivers are leaving the corner at the same speed. But the faster one has a
>greater acceleration, and will be faster on the straight until approaching
>top speed.
>Regards,
>Bart Westra
I should not reply early in the morning, I stumbled over the same hurdle
here! The big advantage does not come from starting to accelerate a bit
earlier, as Matthias has already pointed out. For the same reason, braking a
bit later does not gain great amounts of time either.
I believe it is the rate at which a fast driver can accelerate. Acceleration
like speed has to be build up. Pointing the car better, maintaining optimal
traction, that sort of thing. This would account for a bigger time advantage
then in the situation where the rate of acceleration is the same. The speed
difference would continue to increase until sheer speed itself puts a limit
on how fast the car can accelerate. You can see the effect of what I mean
best in standing starts. Some drivers take off so easily (seemingly); one
who gets wheel spin or is too careful is way behind immediately (both in
distance and in time).
Hope I made myself clear.
Regards,
Bart Westra