INFLUENCE OF WING TIP SHAPE ON LONGITUDINAL

George ARGHIR

Abstract


Abstract: There were analyzed four different wing tip shapes. The coefficient of restoration, CR, is given by the ratio of the largest half wing to the smaller half wing in horizontal projection. Flight is stable for CR = 1.00. The influence of wing thickness profile is high. Increasing in the thickness from 5 mm to 15 mm (3 times), CR increases by 48% (5 mm) and 34% (15 mm). Increasing tilt angle, γ, CR increases from 1.00 to ∞ for γ = 0o, respectively, 80o (α = 10 °) (α - angle of the wing tip to the horizontal), then jump to -∞ and grow with negative values. CR increase from 1.00 to ∞ jumping to -∞ for γ = 60°, with α = 30°. Sideslip occurs when model aircraft has horizontally the longitudinal axes and wing is verticals. Airplane model is in an unstable area, for γ = 80o, respectively, 60o for α = 10o, respectively, 30o. The wing tip should be made of straight lines not rounded.
Key words: Glider airplane model, wing end shape, longitudinal stability.

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References


Arghir, G., Die Ausgleichsflanche des Ruderblattes (On the Shape of the Wings), Der Hangflieger (Germany), 21, October 81, p. E21/39 – 41.

Arghir, G., Aproximarea aripii ideale prin drepte (Ideal wing approzimation by streight lines), Ştiinţă şi Inginerie, An X, Vol. 17, Lucrările celei de A X-a Conferinţe Naţionale Multidisciplinare – cu participare internaţională “Profesorul Dorin PAVEL – fondatorul hidroenergeticii romanesti”, Sebeş, 2010, Editura AGIR, Bucureşti, 2010, p. 229-236. ISSN: 2067-7138.

Arghir, G., On the front view of real wing, Acta Technica Napocensis, Series: Applied Mathematics and Mechanics, 54, Issue 1, 2011, p. 7-12. ISSN: 1221-5872.

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.


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