EST1502 1/4A3-3T Engines/4pk

Solid propellant mini rocket engines in a four-pack built for single-stage ignition and lightweight model rocket flight. Each engine includes threaded ignition components for reliable start and is sized for small rocket airframes with ultra-light lift-off weights. Compatible with rockets requiring 13 mm diameter motors certified for hobby use.

• Precision cast propellant grain and casing for consistent thrust and burn rate

• Standardized 13 mm body fits micro/light hobby rocket mounts

• Short burn period tuned for minimal airframe stress during launch

• Time delay optimized to trigger recovery system ejection at safe apogee

• Includes ignition starters and plugs for complete launch readiness

• Constructed to resist moisture and maintain performance until use

• Meets established model rocketry safety and performance criteria in lightweight applications