A8-5 Engines

The Estes A8-5 Engine is an excellent choice for classrooms and STEM programs that prioritize safety, altitude, and reliability. With a peak thrust of 10.7 newtons and a -5 second delay, this engine is designed for lightweight model rockets up to 2.0 ounces. Its extended coast time supports key learning objectives by allowing students to observe flight dynamics before recovery deployment.

The 5 second delay ensures the rocket slows and arcs after thrust before the ejection charge activates—ideal for demonstrating Newton’s laws, trajectory analysis, and safe recovery system deployment. The standard 18 mm diameter makes the A8-5 compatible with many Estes kits used in education, making lesson planning and build integration simple and effective.

Each pack includes three engines, four igniters, and four igniter plugs—everything needed to prep rockets for a series of reliable launches. The engine’s consistent performance makes it easy for educators to run back-to-back flights during lab periods or rocket days with minimal troubleshooting and downtime.

Whether you're introducing students to physics, engineering, or aerospace design, the Estes A8-5 helps bring core STEM principles to life. It’s a trusted tool for hands-on learning and a reliable engine for classroom, club, or field-based programs that demand repeatable, high-quality launch results.

ATTENTION: Estes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.