I think that the trouble there is that these days wood offers a
relatively poor value proposition in terms of strength and stiffness
per unit dollar. That is especially true when torsional stiffness is
as important as it is on the Blanik. The forward sweep means that the
structure is closer to divergence than would be an unswept wing.


If I were to redo the L-13 wing,first thing would be to remove the forward
sweep and use a strait leading edge with the taper on the trailing edge.
And leave off the wingtip torpedo's,maybe have 45degree winglet's
instead. It will need to go thru the whole certification process anyway so
may as well make change's to simlpify the build.

Ken