Air Shows & EventsAirVenturefeatures_oldOshkosh 2001 Image Gallery: Day Four, Picture 10By Editorial Staff - Published: July 26, 2001 Updated: June 13, 20190PrintEmailFacebookTwitterLinkedin “A Twin Navion…”This rare, 1957 Twin Navion is one of the very few in existence.This page best viewed at 800×600 or better