Estes A3-4T Engines #10013

Estes A3-4T Engines #10013 is an Estes model rocket engine for powered model-rocket flight and launch-day use.

The Estes A3-4T engine is a single-stage mini model rocket engine built for lightweight rockets and designed to deliver consistent, reliable performance. With a total impulse of 2.50 N-sec and a peak thrust of 6.80 newtons (1.5 lbs), this 13 mm diameter engine provides a solid boost for rockets weighing up to 2.0 ounces (57 g). Its 4-second delay allows for a steady coast before the ejection charge activates, helping ensure a controlled flight and dependable recovery system deployment. With a thrust duration of 0.60 seconds, the A3-4T delivers a quick, moderate-power lift-off that’s ideal for rockets requiring a longer delay before ejection. Whether you're launching a favorite kit or testing a new build, the A3-4T supplies reliable thrust and timing that supports a predictable flight path, perfect for hobbyists looking for dependable performance from a mini engine. Each engine pack inclu

Product details

• Manufacturer part number: 10013
• Heartland item number: EST10013

Use only as directed by Estes and follow all package safety, age, launch-site, and supervision requirements.