Friday, March 21, 2025

Aerotech Mega Initiator #89541, Part 6, Fin Filling



One of the fins had a knot hole fill.
It won't be noticeable with an easy CWF fill and sanding.

This fin will go on the flying build.




Here's that inside angle trouble spot I mentioned earlier.

When sprayed with filler/primer you can better see what needs to be cleaned up with better rounding.



The root edge and fillet areas were taped off for the filler/primer spraying

The fin in back is before sanding,
The fin in front is after sanding with 400 grit.



Here's a close up of the sanded fin surface. 
It's easy to see the gray filler left in the shallow grain.

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