Estes B-Class Model Rocket Engines

Shop verified Estes B-class model rocket engines by complete motor designation, delay, package type, and manufacturer part number. This focused page groups B4 and B6 options, including booster, delayed-ejection, and verified mixed-class packs that contain B motors.

Use the exact B motor approved for the rocket

The B impulse class alone does not establish compatibility. Average thrust and delay affect the flight profile and recovery timing, while booster motors serve a different function from motors with an ejection delay. Check the exact rocket instructions and approved motor list before choosing a B4 or B6 designation.

Compare package and delay details

Review the full code, motor diameter, package quantity, and manufacturer part number on each listing. A B6-0, B6-2, B6-4, and B6-6 should not be treated as interchangeable simply because each begins with B6.

Browse all Estes model rocket engines, compare model rocket kits, or return to the model rocket department. Regulated-motor shipping limits may apply.