Semroc Wac Corporal Build, Part 4, Fin Shaping B

Start by sanding the taper from the wide root edge to the thin outside edge. Concentrate on getting the outside edge thin - you don't have to taper the full face yet.

On the right you can see the taper cutting into the black inked edge.

Continue until you get the thin outside edge to about .05" thick.

It's a compromise. You want the outside edge thin while still keeping it strong enough to survive a hard landing.

To show where we're at now, I pencil shaded the fin face down the high point sand line.

Now sand down that face joining the two different widths - a smooth flat face from the root edge to the thinner outside edge.