So from a previous thread,
it was suggested by John L. that I try some RC modeling. I did that today and the results were not what I expected. I sent a step voltage into a single RC (R=1 C=1) and then into a string of 10 R/C's. (R=0.1 and C=0.1). With the long string the voltage was a bit slower at the beginning, but it reached a 1/e value quicker than the single RC. My colleague says I have reproduced the error function (erf). And this looks about right.
Very interesting,
Thanks John
George H.