After seeing our first Blue Box, we were hooked. When the seat is removed, there is the aero flight model simulated with vacuum gizmos. The ingenuity crammed into the trainer is amazing. We wanted to bring it back to life. We now have three Blue Boxes. Our first is a 1942 Navy Model “Esp”, second is a 1943 Army Air Force Model “C-3”, and third is a 1945 ANT-18. The units are in various stages of restoration.