thank you CENTAURUS
I learned it from the book, "Fly the Wing" by Webb...in its latest edition. I had the honor of speaking with the author on the phone for about an hour and he was kind enough to send the latest edition to me along with some short stories (excellent science fiction which he wrote but remains unpublished).
It amazes me how much knowledge is out there, but somehow gets lost as the years go by. Even Wilbur and Orville knew of windshear, calling it Wind Fluries.