Use an airfoil geometry that will generate lift and thus improve the ability of the fin to generate corrective force
Use a combination of composite materials, plywood, and balsa to create a light, rigid, and well-formed airfoil:
OPTIONAL: Use a jig to ensure the fins are precisely aligned with the airframe
Select an airframe material that is strong, easy to work with, and easy to finish drawing on the work of John Coker
CANDIDATE: Fiber-glassed Cardboard Tube
CANDIDATE: Canvas Phenolic
CANDIDATE: Thin-walled filament-wound fiberglass
Select adhesives for construction, again drawing on the work of John Coker
Bonding: Aeropoxy Structural Adhesive
Laminating: Aeropoxy Laminating resin
Filleting: Rocketpoxy G5000
Keep the overall size and weight low enough to fly on mid-power motors. A G is still mid power! The MAC Performance Rocketry 54mm diameter rocket kits are rated G-J e.g.
Mid-power motors: Loki Research G reloads (38/120 case no Hazmat!)
Certification: Baby H e.g. Aerotech H128 or another RMS-29/180 motor: G75J, H165R, H238T
Test tracking & high altitude recover with an I59N (38/480 plugged)
Select materials and use construction techniques so that it can sustain multiple high-power flights
CANDIDATE MATERIAL: 8oz carbon fiber "cut-offs" from PML
OPTIONAL: Use a jig to help remove excess epoxy and ensure the fins remain flat during the lamination process
Allow for single or dual-deploy recovery configurations while maintaining a compact airframe
Single deploy: parachute size and geometry selection pending final construction weight
Spherachute Drone Rocket UAV Weather Balloon Parachute Recovery
Dual deploy: Jolly Logic Chute Release + Guide Chute
OPTIONAL: Capture downward-facing video of the flight
OPTIONAL: Allow for the use of electronic recovery
OPTIONAL: Use a baffle system to cool ejection gasses and protect the recovery system
OPTIONAL: Use a GPS telemetry package to aid in recovery for high-altitude flights
This article by Randy Steck in ROCKETS Magazine was the impetus for this project.
https://s3-us-west-2.amazonaws.com/secure.notion-static.com/fef3b789-4640-46a4-a3b2-738d40d5ce34/Fin-Design-Using-Airfoils--ROCKETS-Magazine.pdf
The author selected an airfoil listed on the Airfoil Tools Website:
Specifically, he chose m2-il airfoil profile: