It was to be "The Last Flight of the Roton," but the flight was not nearly as long as organizers hoped. The last vestige of an attempt to create a low-cost space-launch system, the Roton ATV was headed from its birthplace at the Mojave Airport for display at Classic Rotors, a helicopter museum located at the Ramona Airport. But like many flight experiments before it, this one ended in disappointment Saturday morning. The effort to carry the six-story, cone-shaped vehicle, created by Rotary Rocket, beneath an Army helicopter ran into unexpected difficulties once airborne and the two never left the...