Feasibility review of substitution a high-lift device by a telescopic wing with self-similarity of reynolds

Abstract

This Paper describes results of the feasibility review of a telescopic wing application in unmanned aerial systems with self-similarity of Reynolds Re. Low Re is achieved through low-velocity flow of the lifting surface and small dimensions of an aircraft. Such combination is typical for a mini remotely piloted system according to UVS International classification. At low Reynolds the wing lift and high-lift device performance reduce. While in the high-lift mode, it is possible to adjust the wing area rather than the lift ratio. This can be achieved by a telescopic wing consisting of fixed and retractable sections. A telescopic wing is based on Morphing design with simultaneous wing geometry adapting to current flight parameters in one, two or three planes. The wing is simple by the design and can function as a high-lift device or aileron depending on whether the sections move out at the same time. The area of a telescopic wing with its sections moving out in the high-lift mode needs to be 2.0…2.18 times greater the initial area for Reynolds variation (2.7…4)⋅105.