Vasile Prisacariu

Morphing Wing Concept for Small UAV

The biological flight involves the movement of a wing (lift surface) in viscous medium and it generates lift and resistance for going forward through friction compared to Reynolds number. The morphing concept is generally based on optimizing the aerodynamic form during the mission so it can execute a maneuver flight. This article desires a short passage through the mathematical aspect in 2D of the morphing profile concept.

Aspects Regarding the Performances of Small Swept Flying Wings Mini UAV-s in Aggressive Maneuvers

The UAS are largely used both in civilian and operational theatre missions. The current paper shows an examples for the turning and the spiral as simple maneuvers are also relevant to the development of new tactical capabilities of small UAS through improving the performance itself.

RECOVERY SYSTEM OF THE MULTI-HELICOPTER UAV

The developments of UAS over the last decades have imposed approaches regarding the recover and rescue segment for aerial vectors. Operational and research requirements for UAV impose the use of recover systems due to the nature of the missions. The main purpose of the paper is to offer a global image regarding the recover and salvation systems used of the UAVs. Keyworks: Unmanned aerial vehicles/sistems (UAV/UAS), recover system, multi-helicopter, paragliding

The Limits of Downsizing - A Critical Analysis of the Limits of the Agile Flying Wing MiniUAV

The missions of small flying wing UAVs require maneuver capabilities as well as optimal flight performance to balance the low operating and manufacturing costs. The basic principles in designing aviation structures must be readjusted due to the innovative concepts regarding the use of advanced materials as well as to the perspectives of using alternative energy aboard UAVs. The current paper is a synthesis of the 2D and 3D aerodynamic analysis of small swept flying wing UAVs that offers a global image of the possibilities of a multidimension optimization (miniaturization-scalability, payload-flexibility, minimum performances requirements).

Applications of the Flexible Wing Concept at Small Unmanned Aerial Vehicles

Unmanned Aerial Vehicles have seen a rapid development due to increased miniaturisation of technology, and their multiple usages in both military and civilian fields, thus making this business very profitable. Although the small UAVs are high enabling capabilities, they are still single-role (one flight, one mission). The present paper will present a comparative analysis of the solutions on flexible wing concept and will analyze the possibilities to use the morphing concept at small UAVs.

KINEMATIC ANALYSIS FOR MULTI-COPTER UAV LANDING GEAR

The multi-copter UAV landing gear is used for ground station and shock damping for landings. The materials used in the construction of landing gears are selected by using a ( ) ∑ = − − ⋅ =

Theoretical Analysis and Experimental Researches regarding the Asymmetrical Fluid Flow Applied in Aeronautics

The current paper has been written in order to find the best solutions to replace the antitorque rotor of single-rotor helicopters, with removal of its disadvantages through the Coandă Effect. This would significantly increase the flight performance. The research mainly aims at obtaining a controlled lateral force due to Coandă flows through the tail boom, a force which would be useful for the stabilization needed because of the lifting rotor during the flight of single-rotor helicopters.