quote:Originally posted by Duane Russell:
I must be missing something. Every time the SCPF is described in one of these articles, it says that the course is [the SCPF] long.
I don't know about everyone else, but I know I don't ride a perfect line. Take my wobble into account, and the variance from a perfect line, and my courses are not an extra 5 feet per mile. Three feet, maybe, or even two, if it is a windy day, but rarely 5 feet.
Or, am I missing the whole concept of SCPF? If I am not off-base, we need to try to explain the SCPF to others, so people aren't thinking they are always running a full .001% long.
Duane,
I have noticed you have often said that you wobble when you measure and the SCPF takes care of that. That is not the way I think about my measuring.
Yes, I wobble a bit when measuring. But I also wobble when calibrating. If my wobbles when calibrating are the same as when calibrating there is no effect on length measured. Ok so I am unlikely to wobble exactly the same amount all the time, But do I always wobble more on measuring than when calibrating - unlikely. Or vice versa also unlikely. (Especially now that I have an electric assisted bike to help me up steep hills without wobbles)
I believe the difference between my wobbles when calibrating to when measuring could go either way, so sometimes may add a little distance sometimes subtract.
Note I am not talking about not following straight lines along the SPR, and around the bends. Years of practice and the reproducibility achieved convinces me that I follow very closely to the SPR - well within +/- 0.02%.