Semroc Goblin Build Part 5 Balsa Sanding & Filling

Everyone should know how to round the edges of a fin.
For those who might not, this is just one way to do it.
If you don't have a sanding block, pick one up at a hobby store. Preferably one that allows you can change sandpaper easily.


If you were to follow the original Estes instructions:
On the Goblin, only the leading edge and trailing edge of the fins are rounded.
The root edge and outside edges remain square.

For a consistent round edge use a sanding block with medium grit 220 grit sandpaper.





Using the block gives a more uniform pressure on the balsa and the square corners won't get rounded.
Look down the leading and trailing edges to make sure you have them sanded to a half circle.






Rough form the rounded edges with the 220 grit then switch over to a small piece of 400 grit, set into the soft pad (inside of the first joint) of your thumb or index finger.
Use the 400 grit to knock down any squareness or edges on the rounded edges.