Aero Linx: Hatz Biplane Association Welcome to the official webpage of the Hatz Biplane Association, dedicated to the education and enjoyment of building and flying the Hatz CB-1, Hatz Classic, Bantam, and Kelly-D biplanes. Here you will find HBA news, builder info, where to buy plans and information packs about the Hatz, Hatz Classic and the Kelly-D biplanes, a forum to trade messages with other builders, a bookstore, and so much more!
