Overview

Grain Geometry

• Went with cylindrical geometry, less complex than booster motor 

Nozzle

• Requirements 

• • Withstand 2*max operating pressure of the chamber

  • Attach securely to booster case

  • Support the fin can under high acceleration

  • Optimized for 14350 ft above ground level (sum of 2/3 of height difference from ignition to burnout and ignition

• Materials 

  • Aluminum 6061-T6

  • Canvas phenolic

  • Graphite

• Decided to go with a concave convex nozzle rather than a bell nozzle like on the booster 

• Two part phenolic seemed smart in design, but in practice was difficult to manufacture

• When making the top phenolic ring I got chastised by Todd for a completely infeasible design (was somehow able to manufacture it but it was super sketch)

• In the future it would be much better to make the phenolic into one whole part rather than two pieces

• "Should not do 'pointy sides' of phenolic on the bottom" - Derek

Case