Estes Aries SST, #1927, Build, Part 7, Engine Shrouds

A comment by Naoto K. has proved true!

Those round leading and trailing edges cause the engine shrouds to overhang the balsa.

With the front of the shroud pulled back a little from the rounded edge, the rear of the cardstock overhangs the trailing edge.

I tried the fit of the shrouds over the middle rib.

The rib height is good, at 3/8" away from the root edge, it's just a hair off center.

I trimmed back the back side of the shroud to better fit at the rounded trailing edges.

The rounded wing trailing edge also required trimming back the middle rib.

There was some surface cracks at the sharp folds. The thicker the cardstock, the more likely the folds can start to break up.

I brushed on a thin coat of white glue, keeping the glue on the fold, not down the sides.

After the glue dries, some light sanding can smooth some of it out.