To test which fin fillet design is best for handling the stresses experienced during flight, a series of 20 fins with different fillets have been will be created.
Fillet Materials and Sizes
A fin was constructed for each combination of 5 radius sizes and 4 epoxies, resulting in 20 finsFins were manufactured with the combinations of fillet radii and epoxy types listed below:
| Fillet Radius* | ||||||
|---|---|---|---|---|---|---|
| 0.5" | 0.75" | 1" | 1.25" | 1.5" | ||
| Epoxy type | P | Fin A | Fin B | Fin C | Fin D | Fin E |
| S | Fin F | Fin G | Fin H | Fin I | Fin J | |
S, +P | Fin K | Fin L | Fin M | Fin N | Fin O | |
P, +S | Fin P | Fin Q | Fin R | Fin S | Fin T | |
- Epoxy types
- P: Proline
- S: Systems 3000
- S
- +P: Systems 3000 underneath, Proline on top
- P
- +S: Proline underneath, Systems 3000 on top
- * Fillet radii for S+P and P+S epoxy combinations
- 0.5": 0.25" underneath, 0.5" on top
- 0.75": 0.5" underneath, 0.75" on top
- 1": 0.5" underneath, 1" on top
- 1.25": 0.75" underneath, 1.25" on top
- 1.5": 0.75 underneath, 1.5" on top
Test Fin Design
G10 fiberglass was used for the fins and bases.
Progress So Far
| Fillet Radius | ||||||
|---|---|---|---|---|---|---|
| 0.5" | 0.75" | 1" | 1.25" | 1.5" | ||
| Epoxy type | P | Fin A | Fin B | Fin C | Fin D | Fin E |
| S | Fin F | Fin G | Fin H | Fin I | Fin J | |
S+P | Fin K | Fin L | Fin M | Fin N | Fin O | |
P+S | Fin P | Fin Q | Fin R | Fin S | Fin T | |
- Red: not started
- Yellow: not finished
- Green: finished