Tool used to shape the Fillets<\/h2>\n
I created a special tool (pictured below) to help shape the fillets.\u00a0This tool was created using my 3-D printer. It was shaped to give a fillet of radius approx 6 to 7mm.<\/p>\n The tool was created in FreeCad\u00a0 using a cylinder of radius of 7mm sliced at 45 degrees and attached to a “handle”. This allows me to drag the tool along the surface at 45 degrees, knowing that the curvature of the fillet is approx 7mm.<\/p>\n Here is a photo of it:-<\/p>\n I measured 105 Epoxy and 206 Hardener materials by volume using a syringe. I passed the 413 through a sieve to remove the lumps. Then I introduced 413 filler in small quantities, until it’s consistency was that it JUST held its shape. Then I loaded this Epoxy into another syringe and squeezed it into the fin roots and shaped them.<\/p>\n <\/p>\n Because the fin fillets are so small, I created ALL the fillets in one go.\u00a0 I actually ran out of epoxy and had to create a small second batch. I have it a few days to cure. Below are some photos of me preparing the rocket for filleting, by taping it up.<\/p>\n Below are photos of the finished job.<\/p>\n <\/p>\n The finish wasn’t flash, so I decided some sanding was required so that bumps to show through the tip-to-tip. NOTE: The aim was not to sand it down to completely remove the holes; The Tip-to-tip will handle this. I used a AA battery with Grit 60 sand paper.<\/p>\n <\/p>\n <\/p>\n The Fillet Epoxy I created the fillets using West Systems. The products used were:- 105 Epoxy 206 Hardener 413 Filler\u00a0 (this supersedes 403 filler) Masking tape Tool used to shape the Fillets I created a special tool (pictured below) to help shape the fillets.\u00a0This tool was created using my 3-D printer. It was shaped to … Continue reading Creating the fillets<\/span> ![\"Screenshot](\"http:\/\/leederville.net\/rocket\/wp-content\/uploads\/2018\/09\/tool.png\")
<\/a><\/a>The Procedure<\/h2>\n
<\/a><\/a><\/a>Creating the fillets<\/h2>\n
<\/a><\/a><\/a><\/a>Sanding it down<\/h2>\n
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