Dihedral

[Almandine]

1.Any recommended length for the dihedral? (Wing panel)
2.Do the dihedrals also count toward the maximum horizontally projected wingspan?

[retired1]

Typical is the wing tip 1" to 1.5" higher than the wing.

The magic word is "projected" . If you run a square or a block up to the wing tip, the edge of the block is that value. If you start a wing block as zero, then the other block is the distance. A quick way of checking is to cut a piece of balsa stick to the maximum length. If your wing is less than that, you are fine. If not simply un glue both tips and increase the height .