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| Design fin can | Approx. Time Required | # People Required | Notes |
|---|---|---|---|
| Fin Design & Manufacturing | 36 hours | The more the merrier. | Manufacturing procedure and detailed breakdown described in "Hermes 2 Fin Design & Manufacturing" |
Design/make jigs | |||
| Root bond jig | 3 | Allow for tolerance so fins fit, but don't make slots too loose. Make sure you have a top plate. | |
| Fillet jig | 3 | ||
Tube preparation | |||
| Sand tube | 2 | Sand inside with flapper wheel so that it fits over the motor case | |
| Tube layup | 6 | 2-4 | Rough up the outside of the tube before layup. |
| Root bond | 1 | 5-minute is ok, but if you have time, use a stronger epoxy. | |
| Root fillets | Need 4 sets of fillets but it takes 8 rounds cause you gotta do the ends of each side separately (read below for more detail). You'll have to backtrack from when you want to do the layup to when each fillet has to be done by (can speed up using heat gun) | ||
Layup preparation | |||
| Laser-cut CF cutouts | |||
| Spray-glue to wax paper | |||
| Sand fillets | |||
| Prep vacuum materials | |||
| Layup | |||
| Wet plies/weight | |||
| Layup | |||
| Put on vacuum bagging | |||
| Vacuuming | |||
| Oven Cure | |||
| Set up oven/vacuum materials | |||
| Follow epoxy cure cycle | |||
| Remove vacuum materials | |||
| Clean up edges | |||
| Static load test | |||
| Design/build jig | |||
| Determine testing loads | |||
| Static load test | |||
| Analyze data | |||
| Post-processing | |||
| Sand fillets/outside | |||
| Outer fillets on low spots | |||
| Paint | |||
| Total manufacturing time |
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