This document provides step-by-step instructions for assembling the Estes 2421 Cosmic Explorer flying model rocket kit. It details the preparation of the recovery system, engine, and launch controller, along with safety warnings regarding flammable propellants and the National Association of Rocketry (NAR) Safety Code. The guide includes a complete parts list with part numbers and quantities required for the kit.
| Recommended Engines | B4-4, B6-4, C6-5 |
|---|---|
| Shock Cord Length | 30 inches (76.2 cm) |
| Lower Body Tube Length | 12 inches (30 cm) |
| Launch Lug Length | 2.75 inches (70 mm) |
The recommended engines are B4-4 for first flights, B6-4, and C6-5.
You must always follow the enclosed National Association of Rocketry (NAR) SAFETY CODE.
Take the key out of the controller, wait one minute, disconnect igniter clips, remove the engine, and replace the igniter.