RE: re subscribing to maac.
A "Pylon Number" applied to only those MAAC members that Pylon Raced model aircraft. It may now be obsolete. It was a method of identifying racers from various parts of the Canada. Canada was split into areas with a letter designation. Why the Zone letter was not used I do not know. My Pylon number is 17D, This means I was the seventeenth member to get a number in the "D" area.
Ed S