The Estes 1/4A3-3T engine is a single stage model rocket motor designed for flights in lightweight rockets.

Each package includes four engines, starters (igniters), and starter plugs.

• Designation: 1/4A3T
• Diameter: 13.0000 mm
• Length: 45.0000 mm
• Propellant Weight: 0.8300 g
• Total Weight: 6.1000 g
• Average Thrust: 2.3600 N
• Peak Thrust: 4.9500 N
• Total Impulse: 0.5900 Ns
• Class: 89% 1/4A

Note: We are required to ship orders containing motors by surface mail. So, please plan on your order possibly taking a few days longer than normal to arrive if it contains motors.

Model rocket motors cannot be shipped outside the US.