The Kothmann Airship is a lenticular shaped lighter-than-air craft, which is capable of performing repetitive landings and take-offs without the need for service, replenishment, or mooring structure of any kind, allowing the craft to deliver many consecutive payloads. The Airship has inboard engines enclosed in the acoustically insulated "fan duct" which not only enhances the efficiency of the smaller control surfaces but is therefore, quite silent.
Vertical lift and decent is provided by separate and redundant systems that when used in concert provide high degree of control and payload utilization. Horizontal propulsion is provided by either 1 or 2 fixed motor driven ducted fans located interior to the aircraft. Control surfaces within the propulsion duct provide horizontal control, and lift and decent control. In addition, the structural design, and the "Flying Saucer" shape allow good air speed over a substantial altitude range.
The pendulum nature of the loads makes the airship very easy to control during the landing process. The Kothmann's stability during vertical lift and decent at very low airspeeds is a prime advantage of the amalgamation and the shape. The pendulum loads will reduce or eliminate unwanted pitch and yaw which is common to traditional airships. The Center of Buoyancy is fairly static, unlike traditional airships and is always located closely above the center of gravity, providing the continuous correcting affect around the vertical axis.