Abstract:
An inflatable tower system for establishing an elevated observation platform includes an elongated, inflatable cloth envelope having first and second ends. A blower is provided to introduce air into the cloth envelope at the first envelope end and an observation device, such as a video camera, is mounted on the envelope at the second envelope end. A tension line is attached to the envelope near the second envelope end and disposed in the inflation volume created by the envelope. The tension line exits the envelope near the envelope's first end and is attached to a tension control mechanism to allow the envelope to be inflated from a compact, spiral shape. With this compact shape, the deployment apparatus, including the deflated envelope, fits within and can be deployed from the bed of a pickup truck.
Abstract:
A “wing in ground effect” aerial vehicle includes a wing mounted on a fuselage, and two cycloidal propulsion units for providing lift, thrust and longitudinal control. Additional lift is provided by a lighter-than-air gas such as helium contained in the fuselage. Operationally, the two cycloidal propulsion units and the volume of lighter-than-air gas are concertedly regulated to achieve “wing in ground effect” flight. Importantly, the two cycloidal propulsion units may operate in one of several modes, to include a curtate mode, a prolate mode, and a fixed-wing mode. Additionally, the vehicle may hover. Also, a thruster unit is mounted on the fuselage for providing forward thrust in combination with, or in lieu of, the two cycloidal propulsion units.
Abstract:
An airborne radar antenna system for detecting a target in a volume includes a tethered aerostat and an antenna that is supported above ground by the aerostat. The aerostat-based antenna is used for transmitting and receiving a radar beam into the volume to detect the target. Additionally, the system includes a ground-based transmitter that generates a beacon signal which monitors the antenna configuration at the aerostat. A computer then evaluates the beacon signal to create an error signal which is used to maintain a predetermined configuration for the antenna. The system also includes mechanisms for orienting the radar beam along preselected beam paths between the antenna and the volume.
Abstract:
A system and method for docking an airship to a mooring mast includes a thruster that is mounted to the fore end of the airship. When activated, the thruster generates a thrust vector that is substantially perpendicular to the longitudinal axis of the airship and is selectively directional. In particular, the configuration of the thruster can be changed to vary the direction of the thrust vector around the longitudinal axis to maneuver a connector on the thruster into contact with the mooring mast. Engagement of the connector to the mooring mast then docks the airship to the mooring mast.
Abstract:
A water turbine for generating mechanical energy from a flowing fluid includes a rigid base that can be secured at a fixed position relative to the fluid flow. On the base, a substantially disk-shaped hub is rotatably mounted and at least one blade is positioned on the hub for rotation with the hub around a hub axis. Also, each blade is rotatably mounted onto the hub for rotation of the blade relative to the hub. For the turbine, each blade defines a chord line, and for each blade, a pitch angle can be defined as the instantaneous angle between the blade's chord line and the direction of fluid flow. The turbine also includes a sprocket and chain assembly to rotationally interconnect the hub to each blade. This assembly allows the pitch angle for each blade to be selectively varied during hub rotation.
Abstract:
An airship ballast system includes an engine driven propeller and a cooling tube that is positioned coplanar with the propeller and outside its tip path. One end of the cooling tube is connected to receive exhaust gases from the engine while the other end is connected to a ballast tank. In operation, exhaust gases from the engine are cooled as they transit the cooling tube, and water condensed from the cooled exhaust gases is pumped to the ballast tank to maintain a ballast for the airship.
Abstract:
An inflatable tower system for establishing an elevated observation platform includes an elongated, inflatable cloth envelope. When inflated, the envelope extends from a first relatively large diameter end (i.e. base) to a second relatively small diameter end. A blower is provided to introduce air into the cloth envelope at the first envelope end. An observation device, such as a video camera, is mounted on the envelope at the second envelope end. A method for erecting the inflatable observation tower is also disclosed and includes folding the envelope to establish a crease between the envelope ends. The envelope portion below the crease is then inflated while restraining the second envelope end. Once the portion of the envelope between the crease and the first envelope end is substantially inflated and oriented vertically, the second envelope end is slowly released with continued inflation until the entire elongated envelope is inflated and oriented vertically.