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 Rocket Engine Assembly How-To

B6-4 Engines

SKU: 010021

$12.99
Sale

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
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(5)
17%
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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