Intrigued by Massaud’s spaceship-like design and the possibility of a new aeronautics market, Onera has been testing the aerodynamics and flight-control capabilities of a scale model for the past year. This spring, the agency recommended a slightly less grand version of the airship, capable of carrying 15 passengers and traveling at 80 mph. Massaud hopes the new design will attract the attention of private investors, from whom he aims to secure as much as $15 billion to begin building the Manned Cloud, with a sail date of 2020. Hull A 2.6-million-square-foot hull filled with helium keeps the airship aloft. A de-icing device protects the ship from cold weather, while side fins provide maneuverability and stability. Tail The tapered tail optimizes aerodynamics by minimizing drag and controlling airflow over the hull. Ballast As the airship burns fuel and becomes lighter, pumps inject outside air into the hull. The added weight helps keep the airship from ascending to dangerous heights. Propellers Six turbo engines, 450 kilowatts each, power 16-foot-wide propellers. These generate enough propulsive force to sustain a steady cruising speed of 80 mph. Interior Onera’s design can comfortably carry 15 passengers in its underbelly. The spacious two-story cabin will include a restaurant, library, fitness room, spa, and furniture created by Massaud himself. Keeping weight to a minimum is critical to the blimp’s success, so to reduce water consumption, passengers will only have access to showers—no bubble baths or Jacuzzis.