Fillet Design
Size: 0.75 inch radius fillet
¾” radius fillets and bigger, the fin breaks before fillet
Epoxy Comparison
EPOXY | TENSILE STRENGTH | ELONGATION AT BREAK | COMPRESSIVE STRENGTH | GLASS TRANSITION TEMP (K) |
|---|---|---|---|---|
Systems 3000 | >36,500 PSI | 1.7-1.9% | >15,000 PSI | 427 |
Proline | 9,500 PSI | 15,000 PSI | 408 | |
Aeropoxy | 8,000 PSI | 7% | 11,500 PSI | 443 |
Chosen Epoxy: systems 3000
higher temperature epoxy, better structural properties than alternatives
Risks: air bubbles weaken fillet (mitigation: 9% cabosil, vacuum epoxy for 45 minutes)