Semroc IRIS Build Part 9 Nose Cone Shoulder

The nose cone was filled at the same time with the fins

I mask off the base to keep the filler away from a good fitting nose cone shoulder






To get the best fit at the shoulder, I'll lightly rough up the body tube end (just the flat edge) with 220 grit sandpaper on a block. I don't want to take too much off or shorten the tube, just rough it up a bit.

To the left is the nose cone shoulder lip before.

The nose cone is reinserted into the tube and the balsa shoulder turned against the roughened tube end.
This rough tube actually sands down the rough shoulder lip a bit and gets a better fit to the body tube.

The picture to the right is the shoulder after using the roughened tube end to clean it up.