bigone5500
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- Jan 22, 2009
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I think I need to revamp my filleting technique as it seems I'm using too many steps to get it done...but I do get it done. Here is a list of steps I use in filleting a 4 fin rocket:
*edit*: I forgot to mention that I am using US Composites 150 thick resin and 4:1 fast hardener
- make tick marks to get tape at equal distances from fin root on both BT and fins.
- apply masking tape to fins and BT
- mix enough epoxy to do one fin in a medicine cup
- apply epoxy with a popsicle stick and spread with rounded end to obtain rough fillet
- remove tape from fin sides and at BT. also at rear of fin (epoxy dam)
- dip gloved fingertip in alcohol and smooth out fillet on both sides.
- build up leading edge of fillet by adding epoxy where needed and smoothing with finger.
- wait for epoxy to set up so rocket can be rotated without the it running down
- repeat step 1 for rest of fillets
*edit*: I forgot to mention that I am using US Composites 150 thick resin and 4:1 fast hardener