VTOL UAV New Design
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There are many design for a VTOL UAV. Most Unmanned Aerial Vehicles (UAVs) employ a fixed wing design like that of a traditional plane. But these designs offer limited maneuverability and payload capacity, require a runway to takeoff and land, and are unable to hover. Vertical Take Off and Landing (VTOL) UAVs get around these problems, usually by employing rotors like a helicopter.
Now the new technology has been tested on VTOL UAV that has no external rotating parts, instead relying on a phenomenon known as the Coanda effect to generate lift.

The Coanda effect is the tendency of a fluid jet to become ‘attached’ to a nearby curved body instead of following its original path. The effect can be seen by running a stream of water over the underside of a spoon. The water follows the curve instead of dropping straight down – that’s the Coanda effect.
Air velocity is created in the center of the craft using a fan and then directing the air flow through an outlet so it follows over the curved surface. The amount of lift generated is dependent upon the velocity, mass and density of the air. To help reduce the weight of the craft and maximize durability the craft are made from carbon fiber.
Since the rotation of the fan causes the body of the UAV to rotate in the opposite direction, Developer can placed a series of vanes in the airflow around the outside of the body to neutralize this effect. Moveable flaps on sections of the lifting surface provide yaw control to allow the UAV to turn left or right. And flaps on the outside of the craft use the lift airflow to provide directional control, causing the craft to tilt and move in the direction of the tilt.







