Is this it, Ludwig? http://www.airventure.org/
Man, I wanna go! 16 hr drive though. (I am in Connecticut) Looks cool. There is a WWI air show in Rhinebeck NY http://www.oldrhinebeck.org/ If you have some sort of lay over or are hanging out in the states at all, this is a great show and let me know. Carol and I would meet you there. Only a 3 hr drive.
The gift shop has the leather caps too, snork.