<DOC>
<DOCNO>
246
</DOCNO>
<TITLE>
the design of minimum drag tip fins . with an appendix
- on the conformal transformation of a wing with a
fin .
</TITLE>
<AUTHOR>
falkner,v.m.
</AUTHOR>
<BIBLIO>
arc r + m 2279, 1945.
</BIBLIO>
<TEXT>
  the report describes an investigation into
the design of minimum drag tip fins by lifting line theory .  the
work is based on an exact solution of the conformal
transformation which is applicable to this problem following the
method of trefitz .  three types of solution are treated,
corresponding to symmetrical upper and lower fins, single
upper or lower fins, and unequal upper and lower fins .
a representative range of solutions for circulation distribution
along wing and fins has been calculated for each of the
three cases by the use of elliptic and theta functions .
  a detailed account is given, with examples, of the
procedure for calculating the plan of wing and fins, the lift and
induced drag, and the setting of the fins .
</TEXT>
</DOC>
