64 Foot Times

[IC]

I thought that I'd post up this article on 64 feet times with permission from the author Alan Harris. Just having a look at my times I've found a selection of times recorded in one day at an event at Combe:

2.96
2.95
2.83
2.82
2.81

So my best 64 feet with a S70R with a stage 2 MTE and complete Feritta system for that day was 2.81. I'll have a look for other times. Anybody else got official times for 64 feet standing starts?

Iain

64ft TIMES

Allen Harris
It is increasingly common for timekeepers at speed events to set up additional sensors to trap the time taken to cover the first 64ft off the line, and a speed trap on the fastest part of the course. The value of a speed trap is obvious enough, but what can be learnt from the 64ft time? Clearly, cars with the best power/weight ratios should achieve good times, but more importantly it’s an indication of the level of traction achieved. The more wheelspin, the slower the acceleration, so the 64ft time enables the driver to check the impact of variations in starting technique. A lot also depends on whether you change up a gear in the first 64ft – if your first gear takes you past the sensor you’ll post a better time. The choice of 64ft may have something to do with the fact that a time of 2.0secs equates to an acceleration of 1g – an alluring target to aim for!


Or, if you prefer, here are the figures in graphical form:


The table illustrates the speeds achieved for different 64ft times, assuming constant acceleration. Make of it what you will! TIME
SPEED
2.0
43.6

2.1
41.6

2.2
39.7

2.3
37.9

2.4
36.4

2.5
34.9

2.6
33.6

2.7
32.3

2.8
31.2

2.9
30.1

3.0
29.1

3.1
28.2

3.2
27.3

3.3
26.4

3.4
25.7

3.5
24.9