Test Fin Can Procedure
Required Materials
Raw Materials
Flight Fin Can Procedure
Required Materials
-15deg end mill (LOOK INTO THIS, talk to ethan)
Preparation:
FIT PHENOLIC OVER MOTOR TUBE
Fin jig
-1/4" MDF
-MAKE SURE HOLES ARE BIG ENOUGH
-Fin thickness
Test Fin Can Procedure
Cut and Sand Fins
1) Cut plywood fins to shape on the laser cutter
2) Put on safety glasses and a dust mask
3) Sand the face of each fin using 120 grit sandpaper
4) Bevel edges of fins using a Dremel and sanding bit
Cut and Sand Tube
5) Cut phenolic tube to size
6) Put on safety glasses and a dust mask
7) Sand tube until it fits over the motor case (start with 60 grit, work up to 220)
8) Score the tube (using 60-180 grit sandpaper)
Prepare Tip-to-Tip Cutouts
9) Prepare paper cutouts for tip-to-tip layup
10) Stick wax to fiberglass using spray glue
11) Cut fiberglass shapes with scissors
12) Record mass of fiberglass (will use later to calculate wetness ratio)
13) Mark centerline of each piece with sharpie
Attach Fins to Tube (Root Bond)
14) Score fins
15) Put tube in fin can jig (MORE DETAIL)
16) Put on gloves
17) Mix epoxy
18) Put 5-minute on root chord of each fin
19) Slide fins into slots in the jig
20) Finish assembling jig (put top layer on --> push so that it gets caught on leading edge, BE CAREFUL after glue is set and of messing up LE
21) Attach stabilizing feature
22) Let cure
Root Fillet
23) Remove the fin can from the jig
24) Put on gloves and respirator, ensuring the respirator fits well with a positive/negative pressure test
25) Mix laminating epoxy with colloidal silica
26) Use fillet tool to add fillets
27) Let cure (24 hours)
28) Sand the root fillets
29) Mark centerlines on the tube
Tip-to-tip Layup
30) Put on your respirator and gloves
31) Mix epoxy
32) Record mass of epoxy used
33) Wet the glass sheets with laminating epoxy using squeegees
34) Layup the sheets
35) Implement "Vacuum Procedure" (WHERE?)
Post -processing
Flight Fin Can Procedure
) cut fins
)wax spray CF
) cut shapes
) weight shapes
) cut tube to length
) make sure it fits over motor case
) score eryting
CF layup around tube
) make appropriate fin jig
) assemble in fin jig , root bond
) prepare preforms
) do inner fillets
) sand
) outer fillets
) sand outer fillets
TIP TO TIP
) mix epoxy
)weigh epoxy
) layup
)bag it up til past tacking (+ ONE DAY)
) oven cure? (autoclave)
) sand
) eat donuts