Estes 1/2A3-4T Engine Bulk Pack (24)


Can only be shipped via Standard shipping. If you ordered other items on the same order, these may be shipped separately.

Quantity: Only 1 left in stock.




Skill Level:Beginner

Estes model rocket engine bulk packs are available in four total impulse ranges: 1/2A (mini engine), A, B or C (standard engines). These packs may be used for the rocket bulk packs or other Estes rockets. Whether you are launching rockets at school with students, at a youth group activity or rocket club monthly launch, Estes engine bulk packs are a must.


The Estes 1/2A3-4T might be made to fit smaller rockets, but it will pack a punch! This bulk pack supplies all the model rocket engine supplies you need to launch 24 rockets. The pack includes 24 model rocket engines, 30 starters, 24 starter plugs and 75 squares of recovery wadding. Use the 1/2A3-4T engine to launch the UP Aerospace SpaceLoft and Gnome bulk pack rockets.



  • Length     1.75 in. (4.4 cm)
  • Diameter     13 mm
  • Estimated Weight     .23 oz. (6.5 g)


Used with permission, copyright ©2022 Estes-Cox Corp. Copyright ©2022 Brey Corp. t/a Hobby Works.

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