On Tue, 12 Sep 2017 10:31:56 +0700, John B.
wrote:

Something I've always wondered about is how in the world can I ride an
out and back course and have a head wind both ways :-(

I've often thought that bicycle conventions should be combined with
hang-glider conventions. Each morning when the riders fan out in all
directions, each one pedalling into a headwind, there is going to be a
mighty updraft in the middle.

--
Joy Beeson
joy beeson at comcast dot net
http://wlweather.net/PAGEJOY/