IDEAL WING APPROXIMATED BY STRAIGHT LINES
The ideal wing shape is ellipsoidal seen from above. It can be approximated by straight lines as rectangular or trapezoidal wing. The trapezoidal wing, having 60 % depth at the end of depth of the central of wing, the area is close to the ellipsoidal one. The trapezoidal wing has leading and trailing edges as straight lines, area and weight close, lift identical to, and drag is close to the ellipsoidal one. It is easily to construct, edges as straight lines, and ribbons decreasing linearly from central to the end of the wing. Rectangular wing has increased area, weight, and drag comparative to the ellipsoidal one, at the same lift. A reasonable approach can be rectangular – trapezoidal Uoptimum wing.
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Arghir, G., Construction of real wing close to the ideal wing, Acta Technica Napocensis, Series: Applied Mathematics, Mechanics, and Engineering, Vol. 58, Issue I, March 2015, p. 7-10. ISSN 1221-5872.
Arghir, G., 2016, Influence of wing tip shape on longitudinal stability of glider airplane model, Acta Technica Napocensis, Series: Applied Mathematics, Mechanics, and Engineering, Vol. 59, Issues IV, November, 2016, p. 347-352. ISSN 1221-5872.
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