Estes 1/2A3-4T Mini Engine



Key Features

  • Single stage engine
  • Mini engine designed for flights in lightweight rockets
  • Engines tested and certified by the NAR
  • Easy to use and comes with clear instructions
  • Available in blister pack package


  • Four 1/2A3-4T Engines
  • Four Igniters
  • Four Igniter Plugs


  • Length: 1.75″ (4.4cm)
  • Diameter: .5″ (13mm)

Tech Notes

This is the 1/2A3-4T Mini Model Rocket Engines/Motors from Estes.
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.

WARNING: Flammable. Read instructions before use

Do not burn, soak in water to destroy

Due to small parts that could cause a choking hazard please keep
away from children 3 years of age and younger

For your safety and enjoyment, always follow the NAR Model Rocketry
Safety Code while participating in any model rocketry activities

Residents of California, New Jersey, Rhode Island and North Dakota
please review the Terms of Sale for state specific restrictions

Estes products may contain chemicals known to the State of
California to cause cancer, birth defects or other reproductive

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