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Estes A8-3 Rocket Engines Package
Estes A8-3 Model Rocket Engines
Estes A8-3 Rocket Engines Plugs and Ignitors
Estes A8-3 Model Rocket Engines
Estes A8-3 Rocket Engines Assembly
A8 Model Rocket Engine Thrust Curve Chart
Model Rocket Thrust Curve Example
    Estes A8-3 Rocket Engines Package
    Estes A8-3 Model Rocket Engines
    Estes A8-3 Rocket Engines Plugs and Ignitors
    Estes A8-3 Model Rocket Engines
    Estes A8-3 Rocket Engines Assembly
    A8 Model Rocket Engine Thrust Curve Chart
    Model Rocket Thrust Curve Example
    18mm Rocket Engine Assembly How-To
    Estes Rockets

    A8-3 Engines

    SKU: 010017
    $11.29
    Sale Sold out

    The Estes A8-3 engine is a reliable choice for launching standard-size model rockets to impressive heights. Designed for rockets weighing less than 3.0 ounces, it delivers consistent thrust and a smooth 3-second delay for parachute deployment.

    Perfect for beginners and seasoned rocketeers alike, the A8-3 offers a balanced flight profile that makes it ideal for classroom demonstrations, youth group launches, and everyday backyard fun.

    Includes:
    - 3 A8-3 Engines
    - 4 Starters
    - 4 Starter Plugs

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

    Overview 

    Recommended Rockets

    Specs

    Reviews

    Overview

    The A8-3 is one of Estes’ most popular engines—and for good reason. With a powerful yet manageable thrust profile, it’s designed to launch lightweight model rockets up to 500 feet. The 3-second delay allows the rocket to coast at apogee before deploying the recovery system, resulting in picture-perfect flights and gentle landings.

    This engine is ideal for use in smaller, single-stage rockets and offers a great introduction to model rocketry. Whether you're learning the basics or refining your skills, the A8-3 provides a reliable and predictable flight experience that helps build confidence with every launch.

    Each A8-3 engine is precision-manufactured for consistent performance, so you can trust it to deliver a thrilling liftoff and smooth recovery every time. It's an excellent option for schools, camps, STEM programs, or anyone seeking a safe and satisfying launch.

    The A8-3 three-pack includes everything needed for multiple flights, including starters, plugs, and recovery wadding. Just add your favorite Estes rocket and a launch system, and you're ready to take off.

    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 A8-3 Rocket Engines Plugs and Ignitors

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    Technical Specifications

    Technical Specifications

    • Total Impulse

    2.50 N-sec

    • Time Delay

    3 Seconds

    • Max Lift Weight

    3.0 oz (85 g)

    • Max Thrust

    10.70 Newtons (2.4 lbs)

    • Thrust Duration

    0.80 Seconds

    • Length

    2.8 in. (7 cm)

    • Diameter

    18 mm

    • Weight

    .55 oz. (15.6 g)

    • Propellant Weight

    0.14 oz (4.1 g)
    A8 Model Rocket Engine Thrust Curve Chart

    Customer Reviews

    Based on 7 reviews
    86%
    (6)
    0%
    (0)
    0%
    (0)
    14%
    (1)
    0%
    (0)
    R
    Rocketman
    Good engines

    Engines worked as expected. Had a few ignitor failures but was still able to launch all the engines (9) total. Would by again.

    S
    Stephen Webb

    Worked fine.

    T
    Tim Sinnott
    Igniter wouldn't ignite with the 6 volt Estes controller

    I was not able to ignite the igniter using the standard Estes controller (6 volt). I therefore couldn't get the engine to ignite. The controller is working based on a voltage check. Yesterday I was only able to get the igniters to heat if I bypassed the controller and used 9 volts with a 16 awg wire. I hope to try it this week with my son (who received the rockets for Christmas).

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