Estes Black Star Voyager Build, Part 18, Fitting The Fins

The leading edge width of the lower fin assembly was wider than the upper fins.

On the right I sanded the lower edge width to match the uppers.

On the left, you can see where I sanded into the balsa to adjust the width. This will have to get a recoat of CWF and smooth sanding.

Before the vanes are glued on,

The root edges are sanded to fit around the BT-60 tube body.

Wrap some 220 grit around the tube and sand using a up and down motion. Be sure the assembly is in line with the tube.

Do your fine fitting with a wrap of 400 grit.

Here's a good fit of the lower fin unit.

 

And a good fit of the upper fin assembly.