Once again Stead Airport was alive with the sounds of racing aircraft but this time the pilots were coming to be schooled in the fine art of air racing.   STEAD (June 18) – The Pylon Racing Seminar made its annual visit to the airport here. Any pilot that wants to compete at the air races, is changing classes or hasn’t raced in a while has to go through this course. Veterans also attend as it’s a way to get more time on the course. But for the rookies it’s a time to demonstrate they have the necessary flying skills