Skip to product information
1 of 4

Estes Rockets

A8-3 Engines

A8-3 Engines

Regular price $11.29
Regular price $11.29 Sale price $11.29
Sale Sold out

.The Estes A8-3 Rocket Engine is a single stage engine designed for model rocket flights. Estes 1598 contains an18 mm standard engine designed for flights in rockets weighing 3 ounces or less, including engine.

Each package includes:

  • 3 A8-3 Engines
  • 4 starters
  • 4 starter plugs

Estes 1598 is best for beginner-build level rocket kits that uses18 mm standard engines such as:

  • 1225 Alpha
  • 1256 Alpha III
  • 1261 Baby Bertha
  • 1292 Wizard
  • 1706 Orbis 3D

PLEASE NOTE: This item will ship by US Postal Service only. You MUST HAVE a physical mailbox or post office box for delivery.

ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions.


2.8 in. (7 cm)


18 mm

Estimated Weight

.55 oz. (15.6 g)

Total Impulse

2.50 N-sec

Time Delay

3 Seconds

Estimated Max Lift Weight

3.0 oz (85 g)

Max Thrust

10.70 Newtons (2.4 lbs)

Thrust Duration

0.50 Seconds

Initial Weight

0.55 oz (15.5 g)

Propellant Weight

0.14 oz (4.1 g)

Quantity Per Pack


View full details

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!

Get Support Now!

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!

How to Fly Safely!