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Model Rocket Engines - B Series

Shop from our wide selection of Estes B Series Model Rocket Engines. If the Estes Model Rocket you are launching requires an Estes B Series Model Rocket Engine, find the correct Estes Engines on this page.

B Size rocket engines are twice as powerful as A size Estes rocket motors which will put your rockets higher into the sky. Many of the Estes model rockets will accept B size motors, however, it is always important to check to see exactly what size rocket engine you will need for you rocket. All the rockets you need can be found at 321Rockets.com and don't forget you can buy in bulk as well.

Launching the Cosmic Cobra, Metalizer, Converter, Dragonite or other Estes Model Rocket that uses an Estes B Series Model Rocket Engine? Review the recommended engine list in the Technical Specifications for each Estes Model Rocket on this site to determine the correct Model Rocket Engines.

What do the different color Estes B Series Model Rocket Engines mean? Each type of Estes Engine is printed in a different color:

  • Green Label = Single Stage Engine
  • Purple Label = Upper Stage Engine (can be used as single stage engines in lightweight rockets)
  • Red Label = Booster (contain no delay or ejection charge)
  • Blue Label = Plugged (used for R/C gliders and contain no delay or ejection charge)