1/2A3-2T Engines

The Estes 1/2A3‑2T engine is an ideal choice for early-stage STEM programs and elementary-level rocketry activities. This 13 mm mini engine is designed for lightweight rockets under 3 oz (85 g) and delivers a low-altitude, low-thrust launch experience perfect for schoolyards and small recovery areas. Each package includes four engines, four igniters, and four starter plugs—making it easy to equip multiple student groups for hands-on learning.

With a total impulse of 1.25 N‑s and a peak thrust of 8.3 N, the 1/2A3‑2T provides a safe yet exciting launch that introduces students to key aerospace concepts like Newton’s Laws, acceleration, and trajectory. The short 0.3-second thrust duration and 2-second delay before ejection allow for controlled flights and gentle recoveries, minimizing the risk of rocket damage and maximizing classroom success.

This engine pairs perfectly with Estes mini-engine model kits such as Mini Alpha™, Mini Honest John™, and Mini Bertha™, all commonly used in educational settings. Its compact size and consistent performance make it a top choice for early learners and instructors seeking manageable launch power with reliable outcomes. The 1/2A3‑2T’s reduced altitude and recovery distance are especially well-suited for school programs with space or safety constraints.

Developed with educators in mind, the 1/2A3‑2T engine offers repeatable, measurable performance that aligns with NGSS-aligned lesson plans and hands-on STEM learning. Whether you're introducing rocketry in an after-school program, science class, or summer camp, this engine empowers students to safely explore flight dynamics, engineering design, and real-world aerospace applications.

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.