Scavenger! Build Part 11 Fin Slots

Using a fin marking guide, the tube was marked for three fins.
With the trailing edge of the fin even with the end of the body tube, the top and bottom of the thru-the-wall tab is marked.




The 1/8" fin width is marked on the three fin lines.
This is the area to be removed for the TTW tab.

The outside edges of the fins have been rounded.
Above the top of the fin slot rectangle is a drawn half circle to fit the rounded leading edge of the fin.
The rear of the fin slot remains square. The fin tab doesn't go all the way to the bottom of the body tube. The rear of the fin tab will rest right on the lower centering ring of the engine mount.



My aluminum angle was used for a secure straightedge to cut the fin slots.
For now, the three slots are square at the top and bottom. The tops will be rounded in the next post.