In 1927 Knabenshue produced a 17-foot scale model for a passenger-carrying rigid airship,
dubbed California, in preparation for a dirigible revival that never came to pass. (National Air and Space Museum)
In 1927 Knabenshue produced a 17-foot scale model for a passenger-carrying rigid airship,
dubbed California, in preparation for a dirigible revival that never came to pass. (National Air and Space Museum)