[Gmsh] Again 2D meshing problem

[Bernhard Stoevesandt]

thanx dave,

this helped a lot. now i got it running.

> 3D doesn't work because you try to mesh a huge volume with a very small
> characteristic length around the wing and a large characteristic lengths
> on the exterior sides of the box.

well, it's the geometry i need. but actually it's not been the real
reason. but with your help i found the real reason by myself:
the large characteristic lengths on the exterior box were larger than the
box width. this obviously got gmsh confused. if i use a broader exterior
box, it works. simple as that.

thanx a lot

bernhard