1/2A3-4T Model Rocket Engines, (4pk)

The Estes 1/2A3-4T engine is a mini, single-stage engine built for lightweight model rockets up to 1.0 ounce. With a total impulse of 1.25 N-sec, a maximum thrust of 8.3 newtons, and a brief 0.3-second thrust duration, it's designed for quick, reliable flights in smaller models.

Each 1/2A3-4T engine pack includes four engines, four starters, and four starter plugs-providing hobbyists with the essentials for multiple launches. Its compact size and dependable performance make it an ideal choice for hobbyists and educators seeking a reliable mini engine option.