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following this site: " http://www.charlesriverrc.org/articles/design/markdrela_vtailsizing.htm " , I converted the area of my tail in a v-tail that has an area of 0.052m^3 for each wing and a dihedral angle of 34°.

so I thought I'd go like this: I find the wingspan in my case: Hws = 0.495m Vws = 0.250m, divide them by two and then apply some trigonometry.

ex: wingspan of the V-tail of each surface = cos (34) * (Hws / 2) + sin (56) * (Vws / 2)

Do you think this is a correct approach? Can I use the same approach to determine the sweep angle?

thanks in advance for any reply.