That is very impressive

. You must have been regarded as somewhat of a wonderkid.
We have a wonderkid like that in the race series in which I participate. He won the male U17 olympic time trial this summer with an avg. speed of 28.63 mph, but of course this was using top tt equipment.
I think your speed would have been close, if you've had this same equipment at your disposal.
I have never done speeds like that before, but I'm slowly getting there. This year I broke the 41 kph limit (25.48 mph) - still need about 1 kph to qualify to the world championships, which is my goal for next season.