Abstract: A tethered aerial vehicle, connected to an anchorage system in the ground level through a cord, comprising a pair of fixed wings; and a drive assembly. The drive assembly comprises at least two actuators configured to tilt the axle of the propellers. The fixed wings define a center hole located close to a gravitational center of the aerial vehicle. Within the edges of the center hole located close to the gravitational center of the aerial vehicle is a gimbal anchored to the fixed wings' structure. The drive assembly is located within the edges of the center hole and attached to the gimbal in a manner that the gimbal interfaces the connection between the fixed wings and the drive assembly. The drive assembly comprises of at least two propellers mounted on the same axle (“coaxial propellers”) driven by a counter-rotating motor. The coaxial propellers are configured to rotate in opposite directions with respect to each other.

Abstract: A tethered aerial vehicle, connected to an anchorage system in the ground level through a cord, comprising a pair of fixed wings; and a drive assembly. The drive assembly comprises actuators configured to tilt the propeller's axle. The fixed wings define a center hole located close to a gravitational center of the aerial vehicle. Within the edges of the center hole located close to the gravitational center of the aerial vehicle is a gimbal anchored to the fixed wings structure. The drive assembly is located within the edges of the center hole and attached to the gimbal in a manner that the gimbal interfaces the connection between the fixed wings and the drive assembly. The drive assembly consists of coaxial propellers mounted on the same axle driven by a counterrotating motor. The coaxial propellers are configured to rotate in opposite directions with respect to each other.

Abstract: The present invention provides a communication system for communication between exhibitors and visitors at trade fairs, exhibitions, conferences and the like, which comprises: i) a dedicated contact data organiser unit, being a stand-alone handheld device comprising a processor housed in its own casing, the casing housing internal data storage and having at least one USB port; and ii) a pair of USB flash drives, one configured for use by an exhibitor and the other configured for use by a visitor, wherein, in use, the contact data organiser unit holds a first set of data of the exhibitor's products and services and will transfer that data to a visitor USB flash drive that is coupled to the USB port and will build and hold a second set of data of the visitors who have coupled their visitor USB flash drive to the contact data organiser unit.