Estes B6-4 Model Rocket Engines
Estes B6-4 Rocket Engines
Estes B6-4 Model Rocket Engines Plugs and Ignitors
Estes B6-4 Model Rocket Engines
Estes B6-4 Model Rocket Engine Assembly
B6 Model Rocket Engine Thrust Curve Chart
Model Rocket Thrust Curve Example
18mm Model Rocket Engine Assembly How-to

B6-4 Engines

SKU: 010021
$12.99
Sale Sold out

The Estes B6-4 engine is a versatile and dependable choice for launching standard-size model rockets. Designed for rockets weighing less than 4.0 ounces, it provides a solid boost with a 4-second delay for smooth parachute deployment.

Ideal for beginner to intermediate rocketeers, the B6-4 delivers a balanced combination of altitude and recovery timing—perfect for educational launches, club events, or weekend flights.

3 – B6-4 Engines
4 – Starters
4 – Starter Plugs

PLEASE NOTE: You must have a physical address for delivery.

Overview

The B6-4 is a widely trusted and well-balanced engine that offers reliable performance across a variety of model rocket kits. With a moderate level of thrust and a 4-second delay, it allows rockets to coast effectively before activating the recovery system, making it ideal for rockets that benefit from a longer delay phase after burnout.

Designed for single-stage rockets weighing less than 4.0 ounces, the B6-4 engine delivers consistent results and controlled recoveries, making it a great fit for both new flyers refining their skills and seasoned hobbyists looking for dependable flight profiles.

Whether you're launching for fun or using rockets in a STEM learning environment, the B6-4 engine provides an excellent combination of power, altitude, and control. Its predictable performance has made it a go-to for generations of rocketeers.

Each 3-pack includes everything you need for multiple flights: three B6-4 engines, starters, plugs, and recovery wadding. Just pair with your favorite Estes rocket and launch system for a fun and educational experience.

ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions or Click Here for State Specific Restrictions.

Overview

Estes B6-4 Model Rocket Engines Plugs and Ignitors

Compatible Rockets

Technical Specifications

Technical Specifications

  • Total Impulse

5.00 N-sec
  • Time Delay

4 Seconds
  • Max Lift Weight

4.0 oz (113 g)
  • Max Thrust

12.10 Newtons (2.7 lbs)
  • Thrust Duration

0.80 Seconds
  • Length

2.8 in. (7 cm)
  • Diameter

18 mm
  • Weight

.63 oz. (17.9 g)
  • Propellant Weight

0.23 oz (6.5 g)
B6 Model Rocket Engine Thrust Curve Chart

Customer Reviews

Based on 6 reviews
83%
(5)
17%
(1)
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E
Emmett
Great.

Great rocket motor for 3d printed rockets. The explosion at the end can blow up the print sometimes.

C
Charles Stephens
Ive I been with you since the 70s

I've always trusted your quality

R
Robert Utley
b-64 engines

perfect for my back field, they go high enough but not to high that we lose them

Estes-LP2-06

Live, Online Training and 1:1 Support

Estes Education has been a leader in STEM education for over 60 years. We know that STEM is a vital interdisciplinary topic that requires hands-on and inclusive learning. Explore these supporting materials to take learning to new heights!

Should you have need, you can meet with a member of Education team for FREE, 1:1 online support to learn rocketry basics, how to apply our curriculum, and discover unique teaching strategies. Our team is eager to answer your questions!

Learn About Model Rocket Safety!

Not sure how to safely launch a rocket with your group? Head over to our dedicated Safety instructions page for videos, support, and more!
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